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Tea Improvement in Kenya

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Global Tea Breeding

Abstract

The chapter presents a detailed account of efforts at tea improvement in Kenya with achievements made and challenges to be surmounted since tea was first introduced into the country. Although tea was introduced into Kenya at the turn of the 20th century, concerted efforts at tea improvement could not take root until the early 1960s after the country gained self-rule from Britain. Owing to the heterogeneity of pioneer seedling populations that was accompanied by management constraints, early research efforts resulted in the development of whole single cuttings as propagation materials which, coupled with clonal selection, led to the release and commercialization of high yielding and quality clones. This resulted in rapid expansion of the Kenyan tea industry. To date, the Tea Research Foundation has released a total of 50 high yielding and good quality tea clones for commercial utilization, not just in Kenya alone but also in the entire East African region. The Kenyan tea industry, which almost solely involves the export of black CTC tea, is currently experiencing problems as a result of global annual over-production that is outstripping demand. To counter the declining revenue base of tea enterprises, attempts to undertake tea product diversification and value adding have been initiated. Furthermore, tea improvement activities integrating molecular markers and participatory clonal selection involving farmers and consumers are expected to fast-track the development and adoption of novel varieties within a relatively short period.

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References

  • Ackerman WL (1970) Inter-specific Hybridization of Camellia. Americana Camellia Year Book, pp.65–79.

    Google Scholar 

  • Ackerman WL (1973) Species compatibility relationships within the genus Camellia. Journal of Heredity, 64: 356–358.

    Google Scholar 

  • Anon (1962) Historical notes on tea introduction in Africa. In: Tea Estates in Africa (Compiled by Wilson, Smithett & Co). London: Mabey & Fitzclarence Ltd, 6–9.

    Google Scholar 

  • Anon (2003a) A spot of tea may be a shot in the arm for body’s defenses. The Kansas City Star, Washington.

    Google Scholar 

  • Anon (2003b) Five cups of tea keep the doctor away. The Guardian. 22 April, 2003.

    Google Scholar 

  • Apostolides Z, Nyirenda HE, Mphangwe NIK (2006) Review of tea (Camellia sinensis) breeding and selection in Southern Africa. International Journal of Tea Science, 5(1&2): 13–19.

    Google Scholar 

  • Arulpragasam PV (1990) Micropropagation of tea. In: Achievements and Future Prospects. International Conference on Tea Research: Global Perspective. 11-12 January, 1990, Culcutta, pp.1–5.

    Google Scholar 

  • Association for Strengthening Agricultural Research in Eastern and Central Africa (ASARECA) (2004) Regional Variety List for Kenya, Uganda and Tanzania. The Secretariat, Seed Regional Working Group, Kenya, p.100.

    Google Scholar 

  • Banerjee B (1992a) Botanical classification of tea. In: Willson KC & Clifford MN (eds.) Tea: Cultivation to Consumption. London: Chapman and Hall, pp.39–52.

    Google Scholar 

  • Banerjee B (1992b) Selection and breeding of tea. In: Willson KC & Clifford MN (eds.) Tea: Cultivation to Consumption. London: Chapman and Hall, pp.53–81.

    Google Scholar 

  • Banziger M. Betran FJ, Laffite HR (1997) Efficiency of high nitrogen selection environments for improving maize for low nitrogen target environments. Crop Science, 37: 1103–1109.

    Google Scholar 

  • Barth S, Busimi AK, Friedrich HU, Melchinger AE (2003) Heterosis for biomass yield and related traits in five hybrids of Arabidopsis thaliana L. Heynh. Heredity, 91: 36–42.

    CAS  Google Scholar 

  • Barua DN (1963) Selection of vegetative clone. Tea Encyclopaedia, 163: 32–88.

    Google Scholar 

  • Basu B (2003) Drink tea and keep healthy. International Journal of Tea Science, 2(3): 5–7.

    Google Scholar 

  • Becker WA (1984) Manual of Quantitative Genetics (4th Edition). Pullman: Academic Enterprises, p.188.

    Google Scholar 

  • Berry D, Cilas C (1994) Genetic study of the behavior to black pod disease of cocoa (Theobroma cacao L.) obtained by diallel crossings. Agronomie, 14(9): 599–609.

    Google Scholar 

  • Bezbaruah HP (1974) Tea breeding—a review. Indian Journal of Genetics and Plant Breeding (S), 34(A): 90–100.

    Google Scholar 

  • Bezbaruah HP (1987) Use of interspecific hybrids in tea breeding. Two and A Bud, 34: 1–4.

    Google Scholar 

  • Bradshaw HD (Junior) (1998) Case history in genetics of long-lived plants: Molecular approaches to domestication of a fast-growing forest tree: Populus. In: Paterson AH (eds.) Molecular Dissection of Complex Traits. New York: CRC Press, pp.219–228.

    Google Scholar 

  • Brown GR, Bassoni DL, Gill GP, Fontana JR, Wheeler NC, Megraw RA, Davis MF, Sewell MM, Tuskan GA, Neale DB (2003) Identification of quantitative trait loci influencing wood property traits in loblolly pines (Pinus taeda L.). III. QTL verification and candidate gene mapping. Genetics, 164: 1537–1546.

    PubMed  CAS  Google Scholar 

  • Cannell MGR, Njuguna CK, Ford ED (1977) Variation in yield among competing individuals within mixed genotypes of tea: A selection problem. Journal of Applied Ecology, 14: 969–985.

    Google Scholar 

  • Ceccarelli S, Grando S, Hamblin J (1992) Relationship between barley grain yield measured in low-and high-yielding environments. Euphytica, 64: 49–58.

    Google Scholar 

  • Chang HT, Bartholomew B (1984) Camellias. Portland: Timber Press.

    Google Scholar 

  • Chen ZM (1995) Tea in 21st Century. In: Proceedings of 1995 International Tea-Quality-Human Health Symposium. 7–10 November, 1995, Shanghai, China, pp.3–6.

    Google Scholar 

  • China Tea Varieties Compilation Committee (2001) China Tea Varieties. Shanghai: Shanghai Scientific and Technical Publishers, p.9 (in Chinese).

    Google Scholar 

  • Clifford MN (2000) Anthocyanins-nature, occurrence and dietary burden. Journal of the Science of Food and Agriculture, 80: 1063–1072.

    CAS  Google Scholar 

  • Collard BCY, Jahufer MZZ, Bronwer JB, Pang ECK (2005) An introduction to markers, quantitative trait loci (QTL) mapping and marker-assisted selection for crop improvement: The basic concepts. Euphytica, 142: 169–196.

    CAS  Google Scholar 

  • Cowen NM (1989) Multiple linear regression analysis of RFLP data sets used in mapping QTLs. In: Helentjaris T and Burr B (eds.) Development and Applications of Molecular Markers to Problems in Plant Genetics. New York: Cold Spring Harbor Laboratory Press.

    Google Scholar 

  • Crouzillat D, Menard B, Mora A, Phillips W, Petiard V (2000) Quantitative trait loci analysis in Theobroma cacao using molecular markers: Yield QTL detection and stability over 15 years. Euphytica, 114: 13–23.

    CAS  Google Scholar 

  • Dhawan BN (2006) Tea as a Rasayana. In: Jain NK, Siddiqi MA, Weisburger JH (eds.) Protective Effects of Tea on Human Health. CAB International, pp.6–15.

    Google Scholar 

  • Dias LAS, Kageyama PY (1995) Combining ability for cacao (Theobroma cacao L.) yield components under southern Bahia conditions. Theoretical and Applied Genetics, 90: 534–541.

    Google Scholar 

  • Dufresne CJ, Farnworth ER (2001) A review of latest research findings on the health promotion properties of tea. Journal of Nutritional Biochemistry, 12: 404–421.

    PubMed  CAS  Google Scholar 

  • Elberse IAM, Vanhala TK, Turin JHB, Stam P, van Damme JMM, van Tienderen PH (2004) Quantitative trait loci affecting growth-related traits in wild barley (Hordeum spontaneum) grown under different levels of nutrient supply. Heredity, 93: 22–33.

    PubMed  CAS  Google Scholar 

  • Falconer DS (1989) Introduction of Quantitative Genetic (3rd Edition). New York: John Wiley and Sons, Inc., p.438.

    Google Scholar 

  • Food and Agriculture Organization (FAO) (2010) http://faostat.fao.org/.

    Google Scholar 

  • Gazi MS (1978) Distributional pattern of yield and vacancy of tea in Bangladesh. Tea Journal, 14(2): 19–22.

    Google Scholar 

  • Gill M (1992) Speciality and herbal teas. In: Willson KC & Clifford MN (eds.) Tea: Cultivation to Consumption. London: Chapman and Hall, pp.513–528.

    Google Scholar 

  • Goodchild NA (1960) Vegetative propagation. TRIE Pamphlet, (17): 60–69.

    Google Scholar 

  • Green MJ (1966) Clonal selection in seedling stump nurseries. Tea in East Africa, 6(4): 11–12.

    Google Scholar 

  • Green MJ (1969) New clonal release from the TRI. Tea, 10(1): 15.

    Google Scholar 

  • Green MJ (1971) An evaluation of some criteria used in selecting large yielding tea clones. Journal of Agricultural Science, 76: 143–156.

    Google Scholar 

  • Green MJ (1973) TRI breeding schemes. Tea in East Africa, 13(2): 5.

    Google Scholar 

  • Greenway PJ (1945) Origins of some East African food plants. Part V. East African Journal of Sciences, 11: 56–63.

    Google Scholar 

  • Hackett CA, Wachira FN, Paul S, Powell W, Waugh R (2000) Construction of a genetic linkage map for Camellia sinensis (tea). Heredity, 85: 346–355.

    PubMed  CAS  Google Scholar 

  • Hainsworth E (1965) The 1965 clonal release. Tea, 6(1): 15.

    Google Scholar 

  • Hampton MG (1992) Production of black tea. In: Willson KC & Clifford MN (eds.) Tea: Cultivation to Consumption. London: Chapman and Hall, pp.459–511.

    Google Scholar 

  • Hara Y (2001) Green Tea: Health Benefits and Applications. New York: Marcel Dekker.

    Google Scholar 

  • Hara Y (2006) Prophylactic functions of tea catechins. In: Jain NK, Siddiqi MA, Weisburger JH (eds.) Protective Effects of Tea on Human Health. CAB International, pp.16–24.

    Google Scholar 

  • Hardon J (1995) Participatory Plant Breeding. The outcome of a workshop on participatory plant breeding, 26–29 July, 1995. Plant Genetic Resources, IPGRI Rome.

    Google Scholar 

  • Hasselo HN (1964) Productivity gradient in sloping tea land in Ceylon. Tea Quarterly, 35: 307–317.

    Google Scholar 

  • Horsch RB, Fry JE, Hoffmann NL, Eichholz D, Rogers SG, Fraley RT (1985) A simple and general method for transferring genes into plants. Science, 227: 1229–1231.

    CAS  Google Scholar 

  • Ichikawa H, Kunii M, Isemura M (2004) Mechanism of apoptosis induction selective for cancer cells by EGCG. In: Proceedings of 2004 International Conference on O-Cha (tea) Culture and Science. 4–6 November, 2004, Shizuoka, Japan, pp.458–459.

    Google Scholar 

  • International Plant Genetic Resources Institute (IPGRI) (1997) Descriptors for Tea (Camellia sinensis). Rome, Italy.

    Google Scholar 

  • International Tea Committee (ITC) (2010) Annual Bulletin of Statistics, London.

    Google Scholar 

  • International Union for the Protection of New Varieties of Plants (UPOV) (2008) TG/238/1: Guidelines for the Conduct of Tests for Distinctness, Uniformity and Stability of Tea (Camellia sinensis (L). O. Kuntze). Geneva.

    Google Scholar 

  • Jinks JL (1981) The genetic framework of plant breeding. Philosophical Transactions of the Royal Society (London), B. 292: 407–419.

    Google Scholar 

  • Kamunya SM, Wachira FN (2006) Two new clones (TRFK 371/3 and TRFK 430/90) released for commercial use. Tea, 27(1&2): 4–16.

    Google Scholar 

  • Kamunya SM, Muoki RC (2009) Botanical and Genetical Investigations. Proceedings of Annual Technical Conference. 13–14 March, 2009, Tea Research Foundation of Kenya Training Centre, Kericho, Kenya, pp.6–28.

    Google Scholar 

  • Kamunya SM, Muoki RC, Wachira FN, Pathak RS (2007) Inheritance of yield, drought tolerance and quality traits in tea (Camellia sinensis (L.) O. Kuntze). Tea, 28(2): 20–29.

    Google Scholar 

  • Kamunya SM, Wachira FN, Langát J, Otieno W, Sudoi V (2008) Integrated management of root knot nematode (Meloidogyne spp.) in tea. International Journal of Pest Management, 54(2): 129–136.

    CAS  Google Scholar 

  • Kamunya SM, Wachira FN, Pathak RS, Muoki RC, Wanyoko JK, Ronno WK, Sharma RK (2009) Quantitative genetic parameters in tea (Camellia sinensis (L.) O. Kuntze): I. Combining abilities for yield, drought tolerance and quality traits. African Journal of Plant Science, 3(5): 93–101.

    Google Scholar 

  • Kamunya SM, Wachira FN, Pathak RS, Korir R, Sharma V, Kumar R, Bhardwaj P, Muoki RC, Ahuja PS, Sharma RK (2010). Genomic mapping and testing for quantitative trait loci in tea (Camellia sinensis (L.) O. Kuntze). Tree Genetics and Genomes, 6: 915–929.

    Google Scholar 

  • Karori SM, Ngure RM, Wachira FN, Wanyoko JK, Mwangi JN (2008) Different types of tea products attenuate inflammation induced by Trypanosoma brucei infected mice. Parasitology International, 57: 325–333.

    PubMed  CAS  Google Scholar 

  • Kearsey MJ, Pooni HS (1996) The Genetical Analysis of Quantitative Traits. New York: Stanley Thornes (Publishers) Ltd., p.381.

    Google Scholar 

  • Kearsey MJ, Pooni HS, Syed NH (2003) Genetics of quantitative traits in Arabidopsis thaliana. Heredity, 91: 456–464.

    PubMed  CAS  Google Scholar 

  • Kenya Plant Health Inspectorate Service (KEPHIS) (2004) Kenya National Crop Variety List, 45.

    Google Scholar 

  • Kulasegaram S (1978) Progress in tea breeding. Proceedings of Symposium on Methods of Crop Breeding. October, 1977, Tropical Agricultural Research Service, Tokyo, Japan, 11: 151–160.

    Google Scholar 

  • Lander ES, Botstein D (1989) Mapping mendelian factors underlying quantitative traits using RFLP linkage maps. Genetics, 121: 743–756.

    Google Scholar 

  • Lipton R, Longhurst M (1989) New Seeds and Poor People. London: Unwin and Hyman, p.473.

    Google Scholar 

  • M’Imwere ZK (1997) Tea production in the smallholder sector in Kenya: Achievements, problems and prospects. Tea, 18(2): 75–86.

    Google Scholar 

  • Maeda Y (1989) Inhibitory effects of tea extracts on histamine release from mast cells. Food Hygiene and Safety Science Journal, 30(4): 295–299.

    CAS  Google Scholar 

  • Magoma GN, Wachira FN, Obanda M (2001) The pharmacological potential and catechin diversity inherent in Kenyan tea. Tea, 22(2): 83–93.

    Google Scholar 

  • Mamati GE, Wachira FN, Njuguna CK (2001) 2001 released clones. Tea, 22(1): 6–7.

    Google Scholar 

  • Mamedov MA (1961) Tea selection in Azarbajdzan. Agrobiologia, 1: 62–67.

    Google Scholar 

  • Mather K, Jinks JL (1982) Biometric Genetics. London: Chapman and Hall.

    Google Scholar 

  • Matheson JK (1950) Tea. East African Agriculture. Matheson & Bovill, E.W. OUP. pp.198–206.

    Google Scholar 

  • Matsubara Y, Kumamoto H, Lizuka Y, Murakami T, Okamoto K, Miyake H, Yokoi K (1985) Structure and hypotensive effect of flavonoid glycosides in Citrus unshiu peelings. Agricultural and Biological Chemistry, 49: 909–914.

    CAS  Google Scholar 

  • Medina-Filhno HP (1980) Linkage of Aps-1, Mi and other markers on chromosome 6. Report of Tomato Genetics Cooperative, 30: 26–28.

    Google Scholar 

  • Mondal TK, Bhattacharya A, Ahuja PS, Chand PK (2001) Transgenic tea (Camellia sinensis (L.) O. Kuntze cv. Kangra Jat) plants obtained by Agrobacterium-mediated transformation of somatic embryos. Plant Cell Reports, 20: 712–720.

    CAS  Google Scholar 

  • Mondal TK, Bhattacharya A, Laxmikumaran M, Ahuja PS (2004) Recent advances of tea (Camellia sinensis) biotechnology. Plant Cell, Tissue and Organ Culture, 76: 195–254.

    CAS  Google Scholar 

  • Muoki RC, Wachira FN, Pathak RS, Kamunya SM (2007) Assessment of the mating system of Camellia sinensis in biclonal seed orchards based on PCR markers. Journal of Horticultural Science & Biotechnology, 82(5): 733–738.

    CAS  Google Scholar 

  • Nagarajah S, Ratnasurya (1981) Clonal variability in root growth and drought resistance in tea (Camellia sinensis). Plant and Soil, 60: 153–155.

    Google Scholar 

  • Nakagawa M, Torii H (1965) Studies of flavanols in tea. 4. Enzyme oxidation of flavanols. Agricultural and Biological Chemistry, 20: 278–284.

    Google Scholar 

  • Nakane H, Ono K (1990) Differential inhibitory effects of some catechins derivatives on the activities of HIV reverse transcriptase and cellular deoxyribonucleic acid and RNA polymerase. Biochemistry, 29(11): 2841–2845.

    PubMed  CAS  Google Scholar 

  • Ng’etich WK, Stephens W (2001) Responses of tea to environment in Kenya. 1. Genotype × environment interactions for total dry matter production and yield. Experimental Agriculture, 37: 333–342.

    Google Scholar 

  • Ng’etich WK, Stephens W, Othieno CO (2001) Responses of tea to environment in Kenya: Yield and yield distribution. Experimental Agriculture, 37: 361–372.

    Google Scholar 

  • Niehuis J, Helentjaris T, Slocum M, Ruggero B, Schaefer A (1987) Restriction fragment length polymorphism analysis of loci associated with insect resistance in tomato. Crop Science, pp.797–803.

    Google Scholar 

  • Njuguna CK (1985) 1986 TRFK released clones. Tea, 6(2): 4–5.

    Google Scholar 

  • Njuguna CK (1987) 1988 TRFK released clones. Tea, 8(2): 40–42.

    Google Scholar 

  • Njuguna CK (1989a) TRFK released clones. Tea, 10(1): 5–6.

    Google Scholar 

  • Njuguna CK (1989b) Yield performance of TRFK new released clones from the breeding program. Tea, 10(2): 64–72.

    Google Scholar 

  • Obanda M, Owuor PO, Njuguna CK (1992) The impact of clonal variation of total polyphenols content and polyphenol oxidase activity of fresh tea shoots on plain black tea quality parameters. Tea, 13(2): 129–132.

    Google Scholar 

  • Obanda M, Owuor PO, Taylor SJ (1997) Flavanol composition and caffeine content of green leaf as quality indicators of Kenyan black teas. Journal of the Science of Food and Agriculture, 74: 209–215.

    CAS  Google Scholar 

  • Ohta T, Kobayashi T, Kondo T, Hara Y, Kaji K (2004) Suppression of tumor angiogenesis by EGCG—Comparison with the effect of propolis. In: Proceedings of 2004 International Conference on O-Cha (tea) Culture and Science. 4–6 November, 2004, Shizuoka, Japan, pp.481–482.

    Google Scholar 

  • Ohtsura M (1991) Biochemical examination of chronic tea consumption in the rabbit. Journal of Japanese Food Industry, 38(7): 52–54.

    Google Scholar 

  • Otieno W, Sudoi V, Wachira F, Mamati GE, Chalo R (2002) A report on outbreak of root knot nematodes on tea in Kerugoya and Imenti. TRFK Quarterly Bulletin, 7(3): 6–8.

    Google Scholar 

  • Owuor PO (1992) Comparison of gas chromatographic volatile profiling methods for assessing the flavour quality of Kenya black teas. Journal of the Science of Food and Agriculture, 59: 189–197.

    CAS  Google Scholar 

  • Owuor PO, Othieno CO (1987) Environmental effects on tea quality. I. Locational effects on chemical composition and quality of clonal teas. Proceedings of International Symposium on the Chemistry of Tropical Natural Products. on 24–28 August 1987 Moi University, Kenya.

    Google Scholar 

  • Owuor PO, Reeves SG, Wanyoko JK (1986) Correlation of theaflavins content and valuations of Kenyan teas. Journal of the Science of Food and Agriculture, 37: 507–513.

    CAS  Google Scholar 

  • Owuor PO, Tsushida T, Horita H, Murai T (1988) Effects of geographical area of production on the composition of the volatile flavour compounds in Kenyan clonal black CTC teas. Experimental Agriculture, 24(2): 227–235.

    Google Scholar 

  • Owuor PO, Obaga SMO, Othieno CO (1990) The effect of altitude on the chemical composition of black tea. Journal of the Science of Food and Agriculture, 50: 9–17.

    CAS  Google Scholar 

  • Owuor PO, Obanda M, Apostolides Z, Wright LP, Nyirenda HE, Mphangwe NIK (2006) The relationship between the chemical plain black tea quality parameters and black tea color, brightness and sensory evaluation. Food Chemistry, 97: 644–653.

    Google Scholar 

  • Paul S, Wachira FN, Powell W, Waugh R (1997) Diversity and genetic differentiation among populations of Indian and Kenyan tea (Camellia sinensis (L.) O. Kuntze) revealed by AFLP markers. Theoretical and Applied Genetics, 94(2): 255–263.

    CAS  Google Scholar 

  • Roberts EAH (1958) Chemistry of tea manufacturing of N.E. India. Journal of the Science of Food and Agriculture, 9: 381–390.

    CAS  Google Scholar 

  • Roberts EAH (1962) Economic importance of flavanoid compounds. The Chemistry of Flavanoid Compounds, Pergamon, New York, pp.468–510.

    Google Scholar 

  • Reeves SG, Owuor PO, Othieno CO (1987) Biochemistry of black tea manufacture in Kenya. Tropical Science, 27: 121–123.

    CAS  Google Scholar 

  • Rogers SS (1975) Preliminary observations on pollen tube incompatibility in some tea clones. Tea Quarterly, 45: 463–470.

    Google Scholar 

  • Saiki RK, Gelford DH, Stoffel A, Scharf SJ, Higuchi R, Horn GT, Mullis KB, Erlich HA (1988) Primer directed enzymatic amplification of DNA with a thermostable DNA polymerase. Science 239: 487–491.

    PubMed  CAS  Google Scholar 

  • Saintagne C, Bodenes C, Barreneche Pot D, Plomion C, Kremer A (2004) Distribution of genomic regions differentiating oak species assessed by QTL detection. Heredity, 92: 20–30.

    PubMed  CAS  Google Scholar 

  • Sanderson GW (1963) The chloroform test: A study of its suitability as a means of rapidly evaluating fermenting properties of clones. Tea Quarterly, 34: 193–196.

    Google Scholar 

  • Sebastiampillai AR (1963) Report on plant breeding. Annual Report, Tea Research Institute of Ceylon, pp.87–89.

    Google Scholar 

  • Sharma VS, Ranganathan V (1985) The world of tea today. Outlook on Agriculture, 14: 35–40.

    Google Scholar 

  • Shearer W (2003) Green tea extract may fight HIV. BBC News.

    Google Scholar 

  • Singh ID (1979) Indian tea germplasm and its contribution to the world’s tea industry. Two and A Bud, 26(1): 23–26.

    Google Scholar 

  • Singh ID (1980) Non-conventional approaches to the breeding of tea in North East India. Two and A Bud, 27: 3–6.

    Google Scholar 

  • Singh ID, Sharma PC (1982) Studies in radiation breeding in tea plants. Proceedings of the 4th Annual Symposium on Plantation Crops, pp.1–19.

    Google Scholar 

  • Soller M, Brody T, Genizi A (1976) On the power of experimental designs for the detection of linkage between marker loci and quantitative loci in crosses between inbred lines. Theoretical and Applied Genetics, 47: 35–39.

    Google Scholar 

  • Sperling L, Ashby JA, Smith ME, Weltzien E, McGuire S (2001) A framework for analyzing participatory plant breeding approaches and results. Euphytica, 122: 439–450.

    Google Scholar 

  • Stam P (1991) Some aspects of QTL analysis. In: Pesek J, Hartmann J (eds.) Biometrics in plant breeding. Proceedings of the 8th Meeting of the Eucarpia Section, Biometrics in Plant Breeding. 1-6 July, 1991, Brno, Czechoslovakia.

    Google Scholar 

  • Su MH, Yang SZ, Hsieh CF (2004) The identity of Camellia buisanensis Sasaki (Theaceae). Taiwania, 49(3): 201–208.

    Google Scholar 

  • Sudoi V (1995) Effects of spraying petroleum oil on the control of scale insects Apidiotus sp. and their effects on natural enemies. Tea, 16: 119–123.

    Google Scholar 

  • Sudoi V (1996) Influence of soil applied nitrogen (NPKS 25: 5: 5: 5) on Brevipalpus phoenicis Geikjkes (Acari: Tenuipalpidae) mite incidence and damage symptoms on tea. PhD Thesis, Moi University, Eldoret, Kenya.

    Google Scholar 

  • Sudoi V, Khaemba BM, Wanjala FME (1996) Screening of tea clones for their resistance to Brevipalpus phoenicis Geikjkes (Acari: Tenuipalpidae) attack. Journal of Plantation Crops, 24: 291–295.

    Google Scholar 

  • Sugiyama K (1995) Anti-allergic effects of tea. In: Proceedings of the 3rd International Green Tea Seminar. 1 September, 1995, Seoul, Korea, pp.59–64.

    Google Scholar 

  • Takeda Y (1994) Difference in caffeine and tannin contents between tea cultivars, and application to tea breeding. Japan Agriculture Research Quarterly, 28(2): 117–123.

    CAS  Google Scholar 

  • Takeo T (1992) Green and semi-fermented teas. In: Willson KC & Clifford MN (eds.) Tea: Cultivation to Consumption. London: Chapman and Hall, pp.413–457.

    Google Scholar 

  • Tanksley SD (1993) Mapping polygenes. Annual Review of Genetics, 27: 205–233.

    PubMed  CAS  Google Scholar 

  • Tanksley SD, Medina-Filho H, Rick SM (1982) Use of naturally-occurring enzyme variation to detect and map genes controlling quantitative traits in an interspecific backcross of tomato. Heredity, 49: 11–25.

    Google Scholar 

  • Tea Board of Kenya (TBK) (2010) Annual Report and Accounts 2009/2010.

    Google Scholar 

  • Thiele G, Gardner G, Torrez R, Gabriel J (1997) Farmer involvement in selection of new varieties: Potatoes in Bolivia. Experimental Agriculture, 33: 1–16.

    Google Scholar 

  • Thompson JN, Thoday JM (1974) A definition and standard nomenclature for “polygenic loci”. Heredity, 33: 430–437.

    PubMed  Google Scholar 

  • Todd JR (1955) Green leaf and yellow leaf. TRIEA Pamphlet, 12: 23–29.

    Google Scholar 

  • TRFK (1980) Breeding. Annual Technical Report. Tea Research Foundation of Kenya (TRFK), Tea Board of Kenya, p.30.

    Google Scholar 

  • TRFK (1990) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • (TRFK), Tea Board of Kenya, p.25.

    Google Scholar 

  • TRFK (1991) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • (TRFK), Tea Board of Kenya, pp.15–25.

    Google Scholar 

  • TRFK (1998) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • (TRFK), Tea Board of Kenya, pp.38–41.

    Google Scholar 

  • TRFK (1999) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • (TRFK), Tea Board of Kenya, p.41.

    Google Scholar 

  • TRFK (2001a) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • (TRFK), Tea Board of Kenya, pp.22–25.

    Google Scholar 

  • TRFK (2001b) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • TRFK (2002) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • (TRFK), Tea Board of Kenya, pp.20–28.

    Google Scholar 

  • TRFK (2004) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • TRFK (2005) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • TRFK (2006) Annual Technical Report. Tea Research Foundation of Kenya

    Google Scholar 

  • TRIEA (1966) Tea estate practice. Tea Research Institute of East Africa (TRIEA).

    Google Scholar 

  • Vallejos CE, Tanksley SD (1983) Segregation of isozyme markers and cold tolerance in an interspecific backcross of tomato. Theoretical and Applied Genetics, 66: 241–247.

    Google Scholar 

  • Venkatachalam P, Jayashree R, Rekha K, Sushmakumari S, Sobha S, Jayasree PK, Kala RG, Thulaseedharan A (2006) Rubber Tree (Hevea brasiliensis Muell. Arg). Methods in Molecular Biology, 344: 153–164.

    PubMed  CAS  Google Scholar 

  • Venkataramani KS, Padmanabhan TS (1964) A preliminary assessment of the relationship between certain leaf characteristics and cup quality. Annual Report United Plant Association of South India, Science Department, Tea Section, pp.50–63.

    Google Scholar 

  • Vinson JA, Wu N, Teufel K, Zhang J (2001) Beneficial effects of green and black tea on animal models of antherosclerosis and diabetes. In: Proceedings of 2001 International Conference on O-Cha (tea) Culture and Science (Session III). 5–8 October, 2001, Shizuoka, Japan, p.367.

    Google Scholar 

  • Virk DS, Singh DN, Kumar R, Prasad SC, Gangwar JS, Witcombe JR (2003) Collaborative and consultative participatory breeding of rice for the rainfed uplands of eastern India. Euphytica, 132: 95–108.

    Google Scholar 

  • Visser T (1969) Tea (Camellia sinensis) (L.) O. Kuntze. In outlines of perennial crop Breeding in the Tropics. Miscellaneous paper 4, 459–493. (Ferwerda FP, Wit F eds.) Wageningen — The Netherlands.

    Google Scholar 

  • Visser T, Kehl FH (1958) Selection and vegetative propagation of tea. Tea Quarterly, 29: 76–86.

    Google Scholar 

  • Wachira FN (1990) Biotechnology: An assessment of its applicability in the improvement of Kenyan tea clones-tissue and cell culture. Tea, 11(1): 34–41.

    Google Scholar 

  • Wachira FN (1994a) Clonal yield performance of some cambod teas (Shan tea), C. sinensis var. assamica ssp. lasiocalyx (Planchon ex-Watt). Tea, 15(2): 70–73.

    Google Scholar 

  • Wachira FN (1994b) Triploidy in tea (Camellia sinensis): Effect on yield and yield attributes. Journal of Horticultural Science & Biotechnology, 69(1): 53–60.

    Google Scholar 

  • Wachira FN (1996) Development of molecular markers in Camellia. PhD Thesis, Dundee University, Scotland, p.222.

    Google Scholar 

  • Wachira FN (2002a) Genetic diversity and characterisation of Kenyan tea germplasm. A tea genetic diversity (TGD) project. TGD final project document, Kericho, Kenya.

    Google Scholar 

  • Wachira FN (2002b) Genetic mapping of tea: A review of achievements and opportunities. Tea, 23(2): 91–102.

    Google Scholar 

  • Wachira FN, Kiplangat JK (1991) Newly identified Kenyan polyploid tea strains. Tea, 12(1): 10–13.

    Google Scholar 

  • Wachira FN, Ng’etich W (1999) Dry-matter production and partition in diploid, triploid and tetraploid tea. Journal of Horticultural Science & Biotechnology, 74: 507–512.

    Google Scholar 

  • Wachira FN, Kamunya SM (2005a) Pseudo-self incompatibility in tea clones (Camellia sinensis (L.) O. Kuntze). Journal of Horticultural Science & Biotechnology, 80(6): 716–720.

    Google Scholar 

  • Wachira FN, Kamunya SM (2005b) Kenyan teas are rich in antioxidants. Tea, 26(2): 81–89.

    Google Scholar 

  • Wachira FN, Waugh R, Hackett CA, Powell W (1995) Detection of genetic diversity in tea (Camellia sinensis) using RAPD markers. Genome, 38: 201–210.

    PubMed  CAS  Google Scholar 

  • Wachira FN, Powell W, Waugh R (1997) An assessment of genetic diversity among Camellia sinensis L. (cultivated tea) and its wild relatives based on randomly amplified polymorphic DNA and organelle-specific STS. Heredity, 78: 603–611.

    CAS  Google Scholar 

  • Wachira FN, Tanaka J, Takeda Y (2001) Genetic variation and differentiation in tea (Camellia sinensis) germplasm revealed by RAPD and AFLP variation. Journal of Horticultural Science & Biotechnology, 76: 557–563.

    CAS  Google Scholar 

  • Wachira FN, Ng’etich W, Omolo J, Mamati G (2002) Genotype × environment interaction for tea yields. Euphytica, 127: 289–296.

    CAS  Google Scholar 

  • Walker JRL (1975) The biology of plant phenolics. The Institute of Biology’s Studies in Biology, (54): 23–32.

    Google Scholar 

  • Weisburger JH (2006) Tea is health-promoting beverage in lowering the risk of premature killing chronic diseases: A review. In: Jain NK, Siddiqi MA, Weisburger JH (eds.) Protective Effects of Tea on Human Health. CAB International, pp.1–5.

    Google Scholar 

  • Wight W (1956) Commercial selection and breeding of tea in India. World Crops, 8: 263–268.

    Google Scholar 

  • Wight W (1958) The agrotype in tea taxonomy. Nature, 181: 893–895.

    Google Scholar 

  • Wight W (1961) Combiners for tea breeding. Two and A Bud, 8(3): 3–5.

    Google Scholar 

  • Wight W, Barua DN (1939) The tea plant industry: Some general principles. Tropical Agriculture (Ceylon), 93: 4–13.

    Google Scholar 

  • Wight W, Barua DN (1954) Morphological basis of quality in tea. Nature, 173: 630–631.

    Google Scholar 

  • Wight W, Gilchrist RCHH, Wight J (1963) Note on the colour and quality of tea leaf. Empire Journal of Experimental Agriculture, 31: 124–126.

    Google Scholar 

  • Witcombe JR Joshi A, Joshi KD, Sthapit BR (1996) Farmer participatory crop improvement. I. Variety selection and plant breeding methods and their impact on biodiversity. Experimental Agriculture, 32: 445–460.

    Google Scholar 

  • Witcombe JR, Joshi A, Goyal SN (2003) Participatory plant breeding in maize: A case study from Gujarat, India. Euphytica, 130: 413–422.

    Google Scholar 

  • Woods DJ, Roberts EAH (1964) The chemical basis of quality in tea. Journal of the Science of Food and Agriculture, 15:19–25.

    Google Scholar 

  • Wu CT (1964) Studies on the hereditary variation and morphology of pubescence on young tea shoots. Journal of the Agricultural Association of China, 47(1): 22.

    Google Scholar 

  • Wu JN (1987) Review on ‘Cha Ching’. Beijing: Agriculture Publish Press, pp.168–206.

    Google Scholar 

  • Yamada K (1995) Immune regulatory function of food components and the development of anti-allergic food. Journal of Food Science and Technology, 42(11): 952–958.

    CAS  Google Scholar 

  • Yao GK, Wu X, Xu N (1987) Analysis of the ‘optimum type’ structure of tea plant. Proceedings of International Tea Quality-Human Health Symposium, China, pp.32–36.

    Google Scholar 

  • Yayabe F (2001) Industrial application of tea extracts. In: Proceedings of 2001 International Conference on O-Cha (tea) Culture and Science. 5–8 October, 2001, Shizuoka, Japan, pp.80–83.

    Google Scholar 

  • Yilddizogle-Ari N, Atlan VM, Altinkurt O, Ozturk Y (1991) Pharmacological effects of rutin. Phytotherapy Research, 5: 19–23.

    Google Scholar 

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Kamunya, S.M., Wachira, F.N., Pathak, R.S., Muoki, R.C., Sharma, R.K. (2012). Tea Improvement in Kenya. In: Global Tea Breeding. Advanced Topics in Science and Technology in China. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31878-8_5

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