Acetyl-CoA carboxylase is an important enzyme， which catalyzes acetyl-CoA's carboxylation to produce malonyl-CoA and to serve as a committed step for fatty acid biosynthesis in plastids. In this study， 24 putative cotton genes were identified based on the lately published genome data in . Among them， 4， 4， 8， and 8 homologs were identified in ， and ， respectively. These genes were divided into two classes based on a phylogenetic analysis. In each class， these homologs were relatively conserved in gene structure and motifs. The chromosomal distribution pattern revealed that all the genes were distributed equally on corresponding chromosomes or scaffold in the four cotton species. Segmental ... More
Acetyl-CoA carboxylase is an important enzyme， which catalyzes acetyl-CoA's carboxylation to produce malonyl-CoA and to serve as a committed step for fatty acid biosynthesis in plastids. In this study， 24 putative cotton genes were identified based on the lately published genome data in . Among them， 4， 4， 8， and 8 homologs were identified in ， and ， respectively. These genes were divided into two classes based on a phylogenetic analysis. In each class， these homologs were relatively conserved in gene structure and motifs. The chromosomal distribution pattern revealed that all the genes were distributed equally on corresponding chromosomes or scaffold in the four cotton species. Segmental duplication was a predominant duplication event in both of and The analysis of the expression profile showed that 8 genes expressed in all the tested tissues with changed expression levels， and genes belonging to class II were predominantly expressed in developing ovules. Meanwhile， the expression analysis for the 16 cotton genes from and showed that they were induced or suppressed by cold or salt stress， and their expression patterns varied among different tissues. These findings will help to determine the functional and evolutionary characteristics of the genes in species.
