科研之友
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摘要
Phylogeny of 246 Korean rice varieties from 3 breeding institutes were evaluated using 26 SSR primers. Two hundred ninety alleles were detected on 11 chromosomes. The number of alleles detected per locus ranged 7-16, with an average of 11.15 alleles per locus. The highest frequency of allele occurrence was 22.1% on chromosome 6 and the lowest frequency was 1.7% on chromosome 11. The polymorphic information content (PIC) values ranged 0.523-0.879 with an average of 0.731. Higher PIC values suggests that primer sets could be used in identifying Korean rice varieties. Genetic similarity analysis revealed two major groups. Group 1 included most of the japonica varieties, and Group 2 included predominantly the tongil type rice which is a hybrid of indica and japonica. Cluster analysis showed that there were no distinct clusters among breeding institutes however, some varieties from the same breeding institute occurred in the same sub-cluster. Rice varieties released by the Department of Rice and Winter Cereal Crop exhibited the greatest genetic differences, whereas those of the National Institute of Crop Science exhibited the lowest among the breeding institutes. The phylogenic data suggests that genetic diversity of varieties released by National Institute of Crop Science was greater than that of Department of Rice and Winter Cereal Crop and the Department of Functional Crop. Genetic diversity of special purpose rice such as aromatic, pigmented, waxy, and super yield was greater than rice grown for premium quality. Phylogenic analyses provide a reference data in determining parents to cross for genetic improvement.
- 出版日期2017-4
