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Dinesh Raj, R. and Kiran , A G and George , Thomas (2010) Population genetic structure and conservation priorities of Oryza rufipogon Griff. populations in Kerala, India. Current science , 98 (1). pp. 65-68. ISSN 0011-3891

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Abstract

Oryza rufipogon Griff. is a valuable reservoir of useful traits for rice genetic improvement. We evaluated the genetic diversity of six populations of O. rufipogon from Kerala using random amplified polymorphic DNA (RAPD) markers. Various estimates revealed high genetic diversity in the populations. However, gene flow between the populations was low and 47% of the total genetic diversity was partitioned between populations, suggesting moderate differentiation between them. Clustering of all individuals from the same populations under distinct nodes supported the population differentiation. Considering its outbreeding behaviour, the low gene flow and moderate differentiation recorded in this study indicate that the recent habitat destruction and fragmentation have had an impact on the genetic characteristics of O. rufipogon populations in Kerala. The high genetic diversity observed in this study, contrary to expectations for fragmented populations, is presumably contributed by the recurring gene flow from cultivated rice grown in nearby fields. We recommend immediate conservation of a large number of populations of this species, including establishment of isolated conservatories away from rice fields to maintain the purity of the wild gene pool.

Item Type: Article
Subjects: Plant Disease Biology & Biotechnology
Depositing User: Rgcb Library
Date Deposited: 12 Jul 2019 06:57
Last Modified: 12 Jul 2019 06:57
URI: http://rgcb.sciencecentral.in/id/eprint/823

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