Affordable Access

Differential evolutionary dynamics of duplicated paralogous Adh loci in allotetraploid cotton (Gossypium).

Authors
  • Small, Randall L
  • Wendel, Jonathan F
Type
Published Article
Journal
Molecular biology and evolution
Publication Date
May 01, 2002
Volume
19
Issue
5
Pages
597–607
Identifiers
PMID: 11961094
Source
Medline
License
Unknown

Abstract

Levels and patterns of nucleotide diversity vary widely among lineages. Because allopolyploid species contain duplicated (homoeologous) genes, studies of nucleotide diversity at homoeologous loci may facilitate insight into the evolutionary dynamics of duplicated loci. In this study, we describe patterns of sequence diversity from an alcohol dehydrogenase homoeologous locus pair (AdhC) in allotetraploid cotton (Gossypium, Malvaceae). These data are compared with equivalent information from another homoeologous alcohol dehydrogenase gene pair (AdhA, Small, Ryburn, and Wendel 1999. Mol. Biol. Evol. 16:491-501) which has an overall slower evolutionary rate than AdhC. As expected from the predicted correlation between nucleotide diversity and evolutionary rate, nucleotide diversity was higher for AdhC than for AdhA. In addition, nucleotide diversity is higher in the D-subgenome of allotetraploid cotton for AdhC, confirming earlier observations for AdhA. These observations indicate that for these two pairs of Adh loci, the null hypothesis of equivalent evolutionary dynamics for duplicated genes in allotetraploid cotton is rejected.

Report this publication

Statistics

Seen <100 times