Campus Units
Ecology, Evolution and Organismal Biology
Document Type
Article
Publication Version
Published Version
Publication Date
2020
Journal or Book Title
Nature Genetics
DOI
10.1038/s41588-020-0614-5
Abstract
Polyploidy is an evolutionary innovation for many animals and all flowering plants, but its impact on selection and domestication remains elusive. Here we analyze genome evolution and diversification for all five allopolyploid cotton species, including economically important Upland and Pima cottons. Although these polyploid genomes are conserved in gene content and synteny, they have diversified by subgenomic transposon exchanges that equilibrate genome size, evolutionary rate heterogeneities and positive selection between homoeologs within and among lineages. These differential evolutionary trajectories are accompanied by gene-family diversification and homoeolog expression divergence among polyploid lineages. Selection and domestication drive parallel gene expression similarities in fibers of two cultivated cottons, involving coexpression networks and N6-methyladenosine RNA modifications. Furthermore, polyploidy induces recombination suppression, which correlates with altered epigenetic landscapes and can be overcome by wild introgression. These genomic insights will empower efforts to manipulate genetic recombination and modify epigenetic landscapes and target genes for crop improvement.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Chen, Z. Jeffrey; Sreedasyam, Avinash; Ando, Atsumi; Song, Qingxin; De Santiago, Luis M.; Hulse-Kemp, Amanda M.; Simpson, Sheron; Scheffler, Brian E.; Grover, Corrinne E.; Hu, Guanjing; Conover, Justin L.; Carlson, Joseph W.; Shu, Shengqiang; Wendel, Jonathan F.; Schmutz, Jeremy; and et al., "Genomic diversifications of five Gossypium allopolyploid species and their impact on cotton improvement" (2020). Ecology, Evolution and Organismal Biology Publications. 399.
https://lib.dr.iastate.edu/eeob_ag_pubs/399
Included in
Agriculture Commons, Agronomy and Crop Sciences Commons, Ecology and Evolutionary Biology Commons, Genetics and Genomics Commons
Comments
This article is published as Chen, Z. Jeffrey, Avinash Sreedasyam, Atsumi Ando, Qingxin Song, Luis M. De Santiago, Amanda M. Hulse-Kemp, Mingquan Ding et al. "Genomic diversifications of five Gossypium allopolyploid species and their impact on cotton improvement." Nature Genetics (2020). doi: 10.1038/s41588-020-0614-5.