title: Distribution and evolution of cotton fiber development genes in the fibreless Gossypium raimondii genome.
abstract: Cotton fiber represents the largest single cell in plants and they serve as models to study cell development. This study investigated the distribution and evolution of fiber Unigenes anchored to recombination hotspots between tetraploid cotton (Gossypium hirsutum) At and Dt subgenomes, and within a parental diploid cotton (Gossypium raimondii) D genome. Comparative analysis of At vs D and Dt vs D showed that 1) the D genome provides many fiber genes after its merger with another parental diploid cotton (Gossypium arboreum) A genome although the D genome itself does not produce any spinnable fiber; 2) similarity of fiber genes is higher between At vs D than between Dt vs D genomic hotspots. This is the first report that fiber genes have higher similarity between At and D than between Dt and D. The finding provides new insights into cotton genomic regions that would facilitate genetic improvement of natural fiber properties.
authors: USDA-ARS, Southern Plains Agricultural Research Center, College Station, TX, USA; Bioinformatics and Computational Biology, Iowa State University, Ames, IA, USA.
authors: Zhanyou
authors: Z
authors: Xu
authors: USDA-ARS, Southern Plains Agricultural Research Center, College Station, TX, USA; Department of Horticulture, Washington State University, Pullman, WA, USA.
authors: Jing
authors: J
authors: Yu
authors: USDA-ARS, Southern Plains Agricultural Research Center, College Station, TX, USA.
authors: Russell J
authors: RJ
authors: Kohel
authors: USDA-ARS, Southern Plains Agricultural Research Center, College Station, TX, USA.
authors: Richard G
authors: RG
authors: Percy
authors: Bioinformatics and Computational Biology, Iowa State University, Ames, IA, USA.
authors: William D
authors: WD
authors: Beavis
authors: Department of Horticulture, Washington State University, Pullman, WA, USA.
authors: Dorrie
authors: D
authors: Main
authors: USDA-ARS, Southern Plains Agricultural Research Center, College Station, TX, USA. Electronic address: john.yu@ars.usda.gov.
authors: John Z
authors: JZ
authors: Yu
mesh_terms: D032461:Chromosomes, Plant; D032561:Cotton Fiber; D019143:Evolution, Molecular; D018745:Genome, Plant; D003368:Gossypium / Q000235:genetics*; D011123:Polyploidy; D011995:Recombination, Genetic
keywords: Cotton (Gossypium spp.); EST Unigenes; Fiber development; Gene distribution; Genome evolution; Recombination hotspots