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Cited by 340

The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.

Rate Variation Among Nuclear Genes and the Age of Polyploidy in Gossypium

Open access
Senchina, D. S.·2003·Molecular Biology and Evolution
DOI 10.1093/molbev/msg065
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Abstract

Molecular evolutionary rate variation in Gossypium (cotton) was characterized using sequence data for 48 nuclear genes from both genomes of allotetraploid cotton, models of its diploid progenitors, and an outgroup. Substitution rates varied widely among the 48 genes, with silent and replacement substitution levels varying from 0.018 to 0.162 and from 0.000 to 0.073, respectively, in comparisons between orthologous Gossypium and outgroup sequences. However, about 90% of the genes had silent substitution rates spanning a more narrow threefold range. Because there was no evidence of rate heterogeneity among lineages for any gene and because rates were highly correlated in independent tests, evolutionary rate is inferred to be a property of each gene or its genetic milieu rather than the clade to which it belongs. Evidence from approximately 200,000 nucleotides (40,000 per genome) suggests that polyploidy in Gossypium led to a modest enhancement in rates of nucleotide substitution. Phylogenetic analysis for each gene yielded the topology expected from organismal history, indicating an absence of gene conversion or recombination among homoeologs subsequent to allopolyploid formation. Using the mean synonymous substitution rate calculated across the 48 genes, allopolyploid cotton is estimated to have formed circa 1.5 million years ago (MYA), after divergence of the diploid progenitors about 6.7 MYA.

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Metadata

Authors
Senchina, D. S.
Venue
Molecular Biology and Evolution
Publisher
Oxford University Press (OUP)
Published
2003-04-01
Volume
20
Issue
4
Pages
633-643
ISSN
  • 0737-4038 (ISSN-L)
  • 1537-1719
DOI
10.1093/molbev/msg065
OpenAlex
W2132584083
Cited by
340
References
59
FWCI
20.27
Type
journal article
Language
en
Open access
bronze

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