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Curr Opin Plant Biol. 2003 Apr;6(2):134-8.

Genome-wide intraspecific DNA-sequence variations in rice.

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National Centre for Gene Research, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, 500 Caobao Road, Shanghai 200233, China.


Genome-wide comparative analysis of the DNA sequences of two major cultivated rice subspecies, Oryza sativa L. ssp indica and Oryza sativa L. ssp japonica, have revealed their extensive microcolinearity in gene order and content. However, deviations from colinearity are frequent owing to insertions or deletions. Intraspecific sequence polymorphisms commonly occur in both coding and non-coding regions. These variations often affect gene structures and may contribute to intraspecific phenotypic adaptations.

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