Cited by 31Chromosomal and Genetic VariationsResearch in Cotton CultivationGenome Rearrangement Algorithms

Gene copy number evolution during tetraploid cotton radiation

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Rong, J, Feltus, F A, Liu, L, Lin, L, Paterson, A H·2010·Heredity

Abstract

After polyploid formation, retention or loss of duplicated genes is not random. Genes with some functional domains are convergently restored to 'singleton' state after many independent genome duplications, and have been referred to as 'duplication-resistant' (DR) genes. To further explore the timeframe for their restoration to the singleton state, 27 cotton homologs of genes found to be 'DR' in Arabidopsis were selected based on diagnostic Pfam domains. Their copy numbers were studied using southern hybridization and sequence analysis in five tetraploid species and their ancestral A and D genome diploids. DR genes had significantly lower copy number than gene families hybridizing to randomly selected cotton ESTs. Three DR genes showed complete loss of D genome-derived homoeologs in some or all tetraploid species. Prior analysis has shown gene loss in polyploid cotton to be rare, and herein only one randomly selected gene showed loss of a homoeolog in only one of the five tetraploid species (Gossypium mustelinum). BAC sequencing confirmed two cases of gene loss in tetraploid cotton. Divergence among 5' sequences of DR genes amplified from G. arboreum, G. raimondii, and Gossypioides kirkii was correlated with gene copy number. These results show that genes containing Pfam domains associated with duplication resistance in Arabidopsis have also been preferentially restored to low copy number after a more recent polyploidization event in cotton. In tetraploid cotton, genes from the progenitor D genome seem to experience more gene copy number divergence than genes from the A genome. Together with D subgenome-biased alterations in gene expression, perhaps gene loss may contribute to the relatively larger portion of quantitative trait variation attributable to D than A subgenome chromosomes of tetraploid cotton.

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Authors
Rong, J., Feltus, F. A., Liu, L., Lin, L., & Paterson, A. H.
Affiliations
University of Georgia (US)
Corresponding author
Paterson, A H
Venue
Heredity
Published
2010-02-17
Volume
105
Issue
5
Pages
463-472
ISSN
  • 0018-067X (ISSN-L)
  • 1365-2540
OpenAlex
W2094844584
Cited by
31
References
72
Citations by year
2025: 1 · 2024: 5 · 2023: 1 · 2021: 2 · 2020: 4 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 4 · 2013: 2 · 2012: 4
FWCI
3.07
Type
journal article
Language
en
Open access
Locations
  • Heredity (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Research in Cotton Cultivation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genome Rearrangement Algorithms
Keywords
gene copy number, polyploidy, tetraploid cotton, whole-genome duplication, Pfam domains, Gossypium, Gossypium arboreum, Gossypium raimondii, Gossypium mustelinum, quantitative trait variation
MeSH terms
Autoradiography, Gossypium, Polyploidy, Blotting, Southern, Polymerase Chain Reaction, Gene Dosage, Evolution, Molecular, Expressed Sequence Tags, Gene Duplication

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