Location: Crop Germplasm ResearchTitle: The Gossypium longicalyx genome as a resource for cotton breeding and evolution
|GROVER, CORRINNE - Iowa State University|
|PAN, MENGQIAO - Nanjing Agricultural University|
|YUAN, DAOJUN - Huazhong Agricultural University|
|ARICK, MARK - Mississippi State University|
|HU, GUANJING - Iowa State University|
|BRASE, LOGAN - Washington University|
|STELLY, DAVID - Texas A&M University|
|LU, ZEFU - University Of Georgia|
|SCHMITZ, ROBERT - University Of Georgia|
|PETERSON, DANIEL - Mississippi State University|
|WENDEL, JONATHAN - Iowa State University|
|Udall, Joshua - Josh|
Submitted to: Genes, Genomes, Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/1/2020
Publication Date: 3/2/2020
Citation: Grover, C.E., Pan, M., Yuan, D., Arick, M.A., Hu, G., Brase, L., Stelly, D.M., Lu, Z., Schmitz, R.J., Peterson, D.G., Wendel, J.F., Udall, J.A. 2020. The Gossypium longicalyx genome as a resource for cotton breeding and evolution. Genes, Genomes, Genetics. 10:1457-1467. https://doi.org/10.1534/g3.120.401050.
Interpretive Summary: Gossypium longicalyx is a close, diploid relative of cultivated cotton. The genome of Gossypium longicalyx was sequenced and reported to the cotton research community. G. longicalyx was found to have natural resistance to reniform nemotode and genome segements conferring resistance have been introduced into domesticated cotton (G. hirsutum). These genes provide a source of natural resistance to a major cotton pest. G. longicalyx contains other valuable traits for cotton production. These other traits will be easier to introduce and breed into cultivated cotton now that a genome sequence is available.
Technical Abstract: Cotton is an important crop that has made significant gains in production over the last century. Emerging pests such as the reniform nematode have threatened cotton production. The rare African diploid species Gossypium longicalyx is a wild species that has been used as an important source of reniform nematode immunity. While mapping and breeding efforts have made some strides in transferring this immunity to the cultivated polyploid species, the complexities of interploidal transfer combined with substantial linkage drag have inhibited progress in this area. Moreover, this species shares its most recent common ancestor with the cultivated A-genome diploid cottons, thereby providing insight into the evolution of long, spinnable fiber. Here we report a newly generated de novo genome assembly of G. longicalyx. This high-quality genome leveraged a combination of PacBio long-read technology, Hi-C chromatin conformation capture, and BioNano optical mapping to achieve a chromosome level assembly. The utility of the G. longicalyx genome for understanding reniform immunity and fiber evolution is discussed.