Utilization of Genetic Diversity on Establishing Chinese Soybean (G.max) Core Collection

摘要

Genetic diversity plays a veryimportant role in establishing core collation. Inthis study, A total of 405 Chinese soybeanaccessions was selected from the preliminarycore collection, which had 5 different ecotypesfrom three cultivation regions, includingnortheastern spring sowing soybean (NSpSS),huanghuai summer sowing soybean (HSuSS),southern spring sowing soybean (SSpSS),southern summer sowing soybean (SSuSS),southern autumn sowing soybean (SAuSS). Thegenetic diversities and genetic relationship offive ecotypes were analyzed at DNA level byusing SSR markers in order to provideinformation for establishment of Chinesesoybean core collection. A set of 67 SSRprimers were used to analyze these accessions,and detected 502 alleles with averaged 7.49alleles per locus. SAuSS appeared to be thehighest number of alleles, HSuSS had thebiggest genetic diversity indexes and NSpSSwere lowest for both numbers of alleles andgenetic d versity indexes among 5 ecotypes.Since five ecotypes differentiated obviously,various sampling strategy for establishing corecollection should be adapted for differentecotypes based on the number of alleles andgenetic diversity indexes.