Summary
A dismal 81% failure of newly bulked lines against checks was observed in Indian wheat material evolved by the pedigree method. This is considered to be the consequence of selection in space planting in early generations followed by yield tests in a competitive environment which did not allow any scope of selection for competitive ability. Thus, most of the homozygous lines, which were until now raised and carried forward under space planting, failed to compete with the checks for yield in close planting. It is, therefore, necessary to modify the method to combine both the competitive ability and identity of selected plants. The proposed modified procedure involves raising the population under spaced planting as well as under drilling from F2 onwards. Evaluation for tiller index marks an important step. On the basis of tiller index, single plants are isolated from spaced populations. Steps of the modified procedure are outlined in detail. The modified method, which economises on breeders' workload and other physical inputs, besides having other advantages, can also be used for certain other grain crops. Preliminary results based on the modified method during the past two seasons have indicated its utility.
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References
Aspinall D, Paleg LG (1964) Effect of daylength and light intensity on growth of barley. III. Vegetative development. Aust J Biol Sci 17:807–822
Begg JE, Turner NC (1976) Crop water deficits. Adv Agron 28:161–217
Bunting AH, Drennan DSH (1966) Some aspects of morphology and physiology of cereals in the vegetative phase. In: Milthorpe FL, Iwins JD (eds) Growth of cereals and grasses. Butterworths, London, pp 20–38
Chaturvedi GS, Aggarwal PK, Singh AK, Joshi MG, Sinha SK (1981) Effect of irrigation on tillering in wheat, triticale and barley in a water limited environment. Irrig Sci 2:225–235
Fasoulas AC (1984) Effect of competition in the selection process. In: Lange W, Zeven AC, Hogenboom NG (eds) Efficiency in plant breeding. Pudoc, Wageningen, pp 35–39
Friend DJC (1965) Tillering and leaf production in wheat as effected by temperature and light intensity. Can J Bot 43:1063–1076
Ishag HM, Taha MB (1974) Production and survival of tillers of wheat and their contribution to yield. J Agric Sci 83:117–124
Kelkar HA, Briggs KG (1979) The effect of intergenotypic competition and interplant spacing in simulated segregating rows of wheat. Proc 5th Intern Wheat Genet Symp, New Delhi, pp 778–786
Knott DR (1972) Effects of selection for F2 plant yield on subsequent generations in wheat. Can J Plant Sci 52:721–726
Kulshrestha VP, Chowdhury S (1987) A new selection criterion for yield in wheat. Theor Appl Genet 74:275–279
Mc Ginnis RC, Shebeski LH (1968) The reliability of single plant selection for yield in F2. In: Finley KW (ed) Proc 3rd Intern Wheat Genet Symp, Canberra, pp 109–114
Rawson HM (1971) Tillering pattern in wheat with special reference to shoot at the coleoptile node. Aust J Biol Sci 24:829–841
Saini AD, Nigam PK, Nanda R (1980) Growth characteristics of two wheat (Triticum aestivum L.) varieties differing in grain yield. Indian J Plant Physiol 23:127–136
Simmons SR, Rasmusson DC, Viersma JV (1982) Tillering in barley: genotype, row spacing and seeding rate effects. Crop Sci 22:801–805
Skorda EA (1973) Increasing the efficiency of selection in F2 plant yield by reducing environmental variability. Proc 4th Intern Wheat Genet Symp, Missouri, pp 595–600
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Communicated by B. R. Murty
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Kulshrestha, V.P. A modified pedigree method of selection. Theoret. Appl. Genetics 78, 173–176 (1989). https://doi.org/10.1007/BF00288795
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DOI: https://doi.org/10.1007/BF00288795