Abstract
Dasypyrum villosum (L.) Candargy is a weedy annual diploid (2n = 14, VV genomes) allogamous grass species (Poaceae, Triticeae). Genetic variation for 12 traits was studied in 43 natural populations (31 from Italy and 12 from Croatia and Montenegro of former Yugoslavia) grown in a common field environment in California. Although 7 of 12 traits followed the theoretical prediction that a larger proportion of genetic variation was distributed within populations than among populations, exceptions were found for spike length, plant height, and days to flag-leaf emergence, heading, and anthesis. Covariate analysis showed that developmentally closely related characters were more likely correlated at both population and family within population levels. Geographically closer populations shared more genetic similarity than distant populations as indicated by mean coefficients of variation and cluster analysis of the Euclidean distances among populations. As few as five populations, each population with five or more half-sib seeds taken randomly from 5 plants, is expected to capture more than 95% of the total genetic variation of this species in the region sampled, but sampling a much larger number of seeds per population (> 1000) for long-term storage would supply research and plant breeding needs for several decades. If seed regeneration is required, populations can be sampled from clusters having similar genetic variation, and grown in reproductive isolation or bulked seed samples from all populations of each cluster group can be grown in isolation. The former is recommended if population integrity is desired while the latter is sufficient to provide genetic resources for plant-breeding purposes.
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References
Allard RW (1970) Population structure and sampling methods. In: Frankel OH, Bennett E (eds) Genetic resources in plants. IBP Handbook No 11, Blackwell Scientific Publications, Oxford Edinburgh, pp 97–107
Allard RW (1988) Genetic changes associated with the evolution of adaptedness in cultivated plants and their wild progenitors. J Hered 79:225–238
Blanco A, Simeone R, Resta P (1987) The addition of D. villosum (L.) Candargy chromosomes to durum wheat (Triticum durum Desf). Theor Appl Genet 74:328–333
Brown AHD (1979) Enzyme polymorphism in plant populations. Theor Pop Biol 15:1–42
De Pace C, Qualset CO (1995) Mating system and genetic differentiation in Dasypyrum villosum (L.) Candargy in Italy. Plant Syst Evol (in press)
De Pace C, Paolini R, Scarascia Mugnozza GT, Qualset CO, Delre V (1990) Evaluation and utilization of Dasypyrum villosum as a genetic resource for wheat improvement. In: Srivastava JP, Damania AB (eds) Wheat genetic resources: meeting diverse needs. John Wiley and Sons, UK, pp 279–290
Della Gata C, Tanzarella OA, Resta A, Blanco A (1984) Protein content in a population of Haynaldia villosa and electrophoretic pattern of the amphiploid T. durum x H. villosa. In: Porceddu E (ed) Breeding methodologies in durum wheat and Triticale. University of Tuscia, Viterbo, Italy, pp 39–43
Falconer DS (1981) Introduction to quantitative genetics, 2nd edn. Longman, New York
Frederiksen S (1991) Taxonomic studies in Dasypyrum (Poaceae). Nord J Bot 11:135–142
Goodman MM (1972) Distance analysis in biology. Syst Zool 21:174–186
Hamrick JL, Godt MJ (1989) Allozyme diversity in plant species. In: Brown AHD, Clegg MT, Kahler AL, Weir BS (ed) Plant population genetics, breeding, and genetic resources. Sinauer Associates Inc Publishers, Sunderland, Massachusetts, pp 43–63
Hoskinson PE, Qualset CO (1967) Geographic variation in Balbo rye. University of Tennessee Agricultural Experimental Station: Tennessee Farm and Home Science Progress Report 62:8–9
Jan CC, De Pace C, McGuire PE, Qualset CO (1986) Hybrids and amphiploids of Triticum aestivum L. and T. turgidum L., with Dasypyrum villosum (L.) Candargy. Z Pflanzenzuchtg 96:97–106
Knowles PF (1943) Improving an annual brome grass, Bromus mollis L. for range purposes. J Am Soc Agron 35:584–594
Loeschcke V (1987) Genetic constraints on adaptive evolution. Springer-Verlag, Berlin Heidelberg
Marshall DR (1989) Crop genetic resources: current and emerging issues. In: Brown AHD, Clegg MT, Kahler AL, Weir BS (eds) Plant population genetics, breeding, and genetic resources. Sinauer Associates, Sunderland, Massachusetts, pp 367–388
Marshall DR, Brown AHD (1975) Optimum sampling strategies in genetic conservation. In: Frankel OH, Hawkes JG (eds) Crop genetic resources for today and tomorrow. Cambridge University Press, London, pp 53–80
Murray TD, De La Pena RC, Yildirim A, Jones SS (1994) A new source of resistance to Pseudocercosporellaherpotrichoides, cause of eyespot disease of wheat, located on chromosome 4V of Dasypyrum villosum. Plant Breed 113:281–286
Oka HI (1969) A note on the design of germplasm preservation work in grain crops. SABRAO Newslett 1:127–134
Oka HI (1975) Consideration of the population size necessary for conservation of crop germplasms. In: Matsuo T (ed) Japanese Committee for the International Biological Program, Synthesis 5, University of Tokyo Press, Tokyo, pp 57–63
Qualset CO (1975) Sampling germplasm in a center of diversity. An example of disease resistance in Ethiopian barley. In: Frankel OH, Hawkes JG (eds) Crop genetic resources for today and tomorrow. Cambridge University Press, London, pp 81–96
Qualset CO (1978) Mendelian genetics of quantitative characters with reference to adaptation and breeding in wheat. In: Ramanujam S (ed) Proc 5th Int Wheat Genet Symp, New Delhi, India, pp 577–590
Qualset CO, McGuire PE, Stupar M, Pavicevic L (1984) Collection of Dasypyrum villosum (syn). Haynaldia villosa, Aegilops spp., and Hordeum bulbosum in Yugoslavia. University of California, Davis Agricultural Experiment Station: Agronomy Progress Report 157
Qualset CO, Zhong G-Y, De Pace C, McGuire PE (1993) Population biology and evaluation of genetic resources of Dasypyrum villosum. In: Damania AB (ed) Biodiversity and wheat improvement. John Wiley and Sons, UK, pp 227–232
Sears ER (1953) Addition of the genome of Haynaldia villosa to Triticum aestivum. Am J Bot 40:168–174
Snow L, Brody T (1984) Genetic variation in Hordeum spontaneum in Israel: eco-geographical races, detected by trait measurements. Pl Syst Evol 145:15–28
Sokal RR, Michener CD (1958) A statistical method for evaluating systematic relationships. Univ Kansas Sci Bull 38: 1409–1438
Via S (1984) The quantitative genetics of polyphagy in an insect herbivore. II. Genetic correlations in larval performance within and among host plants. Evolution 38:896–905
Wright S (1942) Statistical genetics and evolution. Bull Am Maths Soc 48:223–246
Zhang Q (1985) Interrelationships of allozyme, morphological markers, disease resistance and quantitative characters in the genetic systems of barley Hordeum vulgare L. PhD Dissertation, University of California, Davis
Zhong G-Y, Qualset CO (1993) Allelic diversity of high-molecularweight glutenin protein subunits in natural populations of Dasypyrum villosum (L.) Candargy. Theor Appl Genet 86:851–858
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Communicated by A. L. Kahler
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Zhong, GY., Qualset, C.O. Quantitative genetic diversity and conservation strategies for an allogamous annual species, Dasypyrum villosum (L.) Candargy (Poaceae). Theoret. Appl. Genetics 91, 1064–1073 (1995). https://doi.org/10.1007/BF00223920
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DOI: https://doi.org/10.1007/BF00223920