Evaluation of Genetic Variation Among Wild Populations and Local Varieties of RiceReport as inadecuate




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Rice

, Volume 4, Issue 3–4, pp 170–177

First Online: 19 November 2011Received: 21 October 2011Accepted: 01 November 2011

Abstract

Cultivated rice Oryza sativa L. is derived from Asian wild rice Oryza rufipogon Griff. Vietnamese local varieties and wild natural populations in Vietnam and Myanmar were examined to evaluate the levels of genetic variation in cultivated and wild rice. In total, 222 Vietnamese local varieties were analyzed with ten microsatellite markers. Using marker genotype and gene diversity data, the local varieties were differentiated based on geographical distribution, cropping season, and human preference. A total of 976 wild plants were collected at six natural sites of wild populations three each in Myanmar and Vietnam, and the degrees of variation among populations were analyzed with five microsatellite markers. Phylogenetic analyses revealed wide genetic differentiation among wild populations. The diversity values detected in a single wild population in Vietnam were higher than those in whole Vietnamese local varieties. These results indicate that wild rice has much greater genetic variation than cultivated rice.

KeywordsGenetic variation Rice Local variety Wild rice Oryza rufipogon  Download fulltext PDF



Author: Takashige Ishii - Takashi Hiraoka - Tomoyuki Kanzaki - Masahiro Akimoto - Rieko Shishido - Ryo Ishikawa

Source: https://link.springer.com/







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