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TitleRepeated polyploidization of Gossypium genomes and the evolution of spinnable cotton fibres
AuthorsAndrew H. Paterson, Jonathan F. Wendel, Heidrun Gundlach, Hui Guo, Jerry Jenkins, Dianchuan Jin, Danny Llewellyn, Kurtis C. Showmaker, Shengqiang Shu, Joshua Udall, Mi-jeong Yoo, Robert Byers, Wei Chen, Adi Doron-Faigenboim, Mary V.Duke, LeiGong, Jane Grimwood, Corrinne Grover,Kara Grupp, GuanjingHu, Tae-ho Lee, Jingping Li, Lifeng Lin, Tao Liu, Barry S. Marler, Justin T. Page, Alison W. Roberts, Elisson Romanel,William S. Sanders, Emmanuel Szadkowski, Xu Tan, Haibao Tang, Chunming Xu, Jinpeng Wang, ZiningWang, Dong Zhang, Lan Zhang, Hamid Ashrafi, Frank Bedon, John E. Bowers, Curt L. Brubaker, Peng W. Chee, Sayan Das, Alan R. Gingle, Candace H. Haigler, David Harker, Lucia V. Hoffmann, Ran Hovav, Donald C. Jones, Cornelia Lemke, Shahid Mansoor, Mehboob ur Rahman, Lisa N. Rainville, Aditi Rambani, Umesh K. Reddy, Jun-kang Rong, Yehoshua Saranga, Brian E. Scheffler, Jodi A. Scheffler, David M. Stelly, Barbara A. Triplett, Allen Van Deynze, Maite F. S. Vaslin, Vijay N. Waghmare, Sally A. Walford, Robert J. Wright, Essam A. Zaki, Tianzhen Zhang, Elizabeth S. Dennis, Klaus F. X. Mayer, Daniel G. Peterson, Daniel S. Rokhsar, Xiyin Wang, & Jeremy Schmutz
Year2012
Taxoncotton
PDFnature11798.pdf
PublicationNature | Vol 492 | 20/27 December 2012
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AbstractPolyploidy often confers emergent properties, such as the higher fibre productivity and quality of tetraploid cottons than diploid cottons bred for the same environments. Here we show that an abrupt five- to sixfold ploidyincrease approximately 60 million years (Myr) ago, and allopolyploidy reuniting divergent Gossypium genomes approximately 12 Myr ago, conferred about 3036-fold duplication of ancestral angiosperm (flowering plant) genes in elite cottons (Gossypium hirsutum and Gossypium barbadense), genetic complexity equalled only by Brassica among sequenced angiosperms. Nascent fibre evolution, before allopolyploidy, is elucidated by comparison of spinnable-fibred Gossypium herbaceum A and non-spinnable Gossypium longicalyx F genomes to one another and the outgroup D genome of non-spinnable Gossypium raimondii. The sequence of a G. hirsutum AtDt (in which t indicates tetraploid) cultivar reveals many non-reciprocal DNA exchanges between subgenomes that may have contributed to phenotypic innovation and/or other emergent properties such as ecological adaptation by polyploids. Most DNA-level novelty in G. hirsutum recombines alleles from the D-genome progenitor native to its New World habitat and the Old World A-genome progenitor in which spinnable fibre evolved. Coordinated expression changes in proximal groups of functionally distinct genes, including a nuclear mitochondrial DNA block, may account for clusters of cotton-fibre quantitative trait loci affecting diverse traits. Opportunities abound for dissecting emergent properties of other polyploids, particularly angiosperms, by comparison to diploid progenitors and outgroups.

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.: 2009 :: Barry Marler :: Plant Genome Mapping Laboratory :: University of Georgia