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- W2171869673 abstract "Genetic diversity among 49 Indian accessions of rice (Oryza sativa subsp. indica), including 29 landraces from Jeypore, 12 modern cultivars, and 8 traditional cultivars from Tamil Nadu, was investigated using AFLP markers. In total, nine primer combinations revealed 664 AFLPs, 408 of which were found to be polymorphic. The percentage of polymorphic AFLPs was approximately the same within the cultivars and landraces. Similar results were obtained when genetic diversity values were estimated using the ShannonWeiner index of diversity. Genetic diversity was slightly higher in the modern cultivars than in the traditional cultivars from Tamil Nadu. Among the landraces from Jeypore, the lowland landraces showed the highest diversity. The present study showed that the process of breeding modern cultivars did not appear to cause significant genetic erosion in rice. Cluster analysis and the first component of principle component analysis (PCA) both showed a clear demarcation between the cultivars and landraces as separate groups, although the genetic distance between them was narrow. The modern cultivars were positioned between the landraces from Jeypore and the traditional cultivars from Tamil Nadu. The second component of PCA further separated medium and upland landraces from lowland landraces, with the lowland landraces found closest to the traditional and modern cultivars.Key words: rice, Oryza sativa, AFLP, landraces, genetic diversity." @default.
- W2171869673 created "2016-06-24" @default.
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- W2171869673 date "2002-06-01" @default.
- W2171869673 modified "2023-10-16" @default.
- W2171869673 title "Genetic diversity in cultivars and landraces of <i>Oryza sativa</i> subsp. <i>indica</i> as revealed by AFLP markers" @default.
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- W2171869673 doi "https://doi.org/10.1139/g02-003" @default.
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