Genetic diversity and field uniformity of Korean rice (Oryza sativa L.) varieties
2001
Jong, S.K. (Chungbuk National Univ., San 48, Gaeshingdong, Heungduckgu, Chongju 361-763 (Korea). Coll. of Agriculture)
Field uniformity as well as genetic diversity is important for the plant breeders who try to develop highly adaptable varieties as well as to avoid genetic vulnerability in situ. Coefficient of percentage (CP) and pedigree analysis on total of 77 rice varieties cultivated currently in Korea were made to assess genetic and field uniformity. The 68 varieties were classified into 7 distinct clusters excluding 8 varieties which were genetically isolated from other clusters. Average CP between clusters ranged from 0.0306 in cluster 1 to 0.2110 in cluster 3. Both have high average CP within a cluster and low average CP between clusters indicated that clusters of rice varieties are genetically distinct from each other. However, the field uniformity, weighted CP by the proportion of the area occupied, was higher compared to the overall genetic diversity. The genetic diversity and field uniformity of rice varieties in different regions also appeared to be different
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