Genomic variation in rice: genesis of highly polymorphic linkage blocks during domestication.

ABSTRACT: Genomic regions that are unusually divergent between closely related species or racial groups can be particularly informative about the process of speciation or the operation of natural selection. The two sequenced genomes of cultivated Asian rice, Oryza sativa, reveal that at least 6% of the genomes are unusually divergent. Sequencing of ten unlinked loci from the highly divergent regions consistently identified two highly divergent haplotypes with each locus in nearly complete linkage disequilibrium among 25 O. sativa cultivars and 35 lines from six wild species. The existence of two highly divergent haplotypes in high divergence regions in species from all geographical areas (Africa, Asia, and Oceania) was in contrast to the low polymorphism and low linkage disequilibrium that were obse

SUBMITTER: Tang T 

PROVIDER: S-EPMC1636696 | biostudies-literature | 2006 Nov

REPOSITORIES: biostudies-literature