Incongruent patterns of local and global genome size evolution in cotton.

ABSTRACT: Genome sizes in plants vary over several orders of magnitude, reflecting a combination of differentially acting local and global forces such as biases in indel accumulation and transposable element proliferation or removal. To gain insight into the relative role of these and other forces, approximately 105 kb of contiguous sequence surrounding the cellulose synthase gene CesA1 was compared for the two coresident genomes (AT and DT) of the allopolyploid cotton species, Gossypium hirsutum. These two genomes differ approximately twofold in size, having diverged from a common ancestor approximately 5-10 million years ago (Mya) and been reunited in the same nucleus at the time of polyploid formation, approximately 1-2 Mya. Gene content, order, and spacing are largely conserved between the two g

SUBMITTER: Grover CE 

PROVIDER: S-EPMC509256 | biostudies-literature | 2004 Aug

REPOSITORIES: biostudies-literature