Journal ArticleOpen Access
Genetic variation in resistance to blast (<i>Pyricularia oryzae</i> Cavara) in rice (<i>Oryza sativa</i> L.) germplasms of Bangladesh
Author Affiliations
Bangladesh Rice Research Institute, University of Tsukuba, Japan International Research Center for Agricultural Sciences
Published InBreeding Science
Year2017
Citations14
Abstract
Genetic variation in blast resistance was clarified in 334 Bangladesh rice accessions from 4 major ecotypes (Aus, Aman, Boro and Jhum). Cluster analysis of polymorphism data of 74 SSR markers separated these accessions into cluster I (corresponding to the Japonica Group) and cluster II (corresponding to the Indica Group). Cluster II accessions were represented with high frequency in all ecotypes. Cluster II was further subdivided into subclusters IIa and IIb. Subcluster IIa accessions were represented with high frequency in only Aus and Jhum ecotypes. Cluster I accessions were more frequent in the Aman ecotype than in other ecotypes. Distinct variations in resistance were found, and accessions were classified into 4 groups (A1, A2, B1 and B2) based on their reactions…
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