Genetic Structure and Diversity in Oryza sativa L.

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ID: 296983
2005
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Abstract
The population structure of domesticated species is influenced by the natural history of the populations of predomesticated ancestors, as well as by the breeding system and complexity of the breeding practices exercised by humans. Within Oryza sativa, there is an ancient and well-established divergence between the two major subspecies, indica and japonica, but finer levels of genetic structure are suggested by the breeding history. In this study, a sample of 234 accessions of rice was genotyped at 169 nuclear SSRs and two chloroplast loci. The data were analyzed to resolve the genetic structure and to interpret the evolutionary relationships between groups. Five distinct groups were detected, corresponding to indica, aus, aromatic, temperate japonica, and tropical japonica rices. Nuclear and chloroplast data support a closer evolutionary relationship between the indica and the aus and among the tropical japonica, temperate japonica, and aromatic groups. Group differences can be explained through contrasting demographic histories. With the availability of rice genome sequence, coupled with a large collection of publicly available genetic resources, it is of interest to develop a population-based framework for the molecular analysis of diversity in O. sativa.
Reference Key
openalex_W2127367029 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Amanda Garris, Thomas H. Tai, Jason Coburn, S. Kresovich, Susan R. McCouch
Journal current genetics
Year 2005
DOI
10.1534/genetics.104.035642
URL
https://academic.oup.com/genetics/article-pdf/169/3/1631/42071372/genetics1631.pdf
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