Contrasting population genetic structure and gene flow between Oryza rufipogon and Oryza nivara.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Hai-Fei ZhouSong Ge

Abstract

The cross compatible wild relatives of crops have furnished valuable genes for crop improvement. Understanding the genetics of these wild species may enhance their further use in breeding. In this study, sequence variation of the nuclear Lhs1 gene was used to investigate the population genetic structure and gene flow of Oryza rufipogon and O. nivara, two wild species most closely related to O. sativa. The two species diverge markedly in life history and mating system, with O. rufipogon being perennial and outcrossing and O. nivara being annual and predominantly inbreeding. Based on sequence data from 105 plants representing 11 wild populations covering the entire geographic range of these wild species, we detected significantly higher nucleotide variation in O. rufipogon than in O. nivara at both the population and species levels. At the population level the diversity in O. rufipogon (Hd = 0.712; theta (sil) = 0.0017) is 2-3 folds higher than that in O. nivara (Hd = 0.306; theta (sil) = 0.0005). AMOVA partitioning indicated that genetic differentiation among O. nivara populations (78.2%) was much higher than that among O. rufipogon populations (52.3%). The different level of genetic diversity and contrasting population genetic ...Continue Reading

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Citations

Mar 10, 2011·Journal of Computational Biology : a Journal of Computational Molecular Cell Biology·Navodit MisraRussell Schwartz
Jun 17, 2010·BMC Evolutionary Biology·Michael ReagonAna L Caicedo
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Apr 16, 2015·Evolution; International Journal of Organic Evolution·Xin-Sheng Hu
Jun 9, 2010·Systematic Biology·Karen A CranstonRod A Wing

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