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ARS Home » Plains Area » College Station, Texas » Southern Plains Agricultural Research Center » Crop Germplasm Research » Research » Publications at this Location » Publication #363636

Research Project: Cotton Genetic Resource Management and Genetic Improvement

Location: Crop Germplasm Research

Title: Genetic analysis of the transition from wild to domesticated cotton (G. hirsutum L.)

item GROVER, CORRINNE - Iowa State University
item YOO, MI-JEONG - University Of Florida
item LIN, MENG - Cornell University
item MURPHY, MATTHEW - University Of Illinois
item HARKER, DAVID - University Of Texas Southwestern Medical Center
item BYERS, ROBERT - Brigham Young University
item LIPKA, ALEXANDER - University Of Illinois
item HU, GUANJING - Iowa State University
item YUAN, DAOJUN - Iowa State University
item CONOVER, JUSTIN - Iowa State University
item Udall, Joshua - Josh
item PATERSON, ANDREW - University Of Georgia
item GORE, MICHAEL - Cornell University
item WENDEL, JONATHAN - Iowa State University

Submitted to: G3, Genes/Genomes/Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/5/2019
Publication Date: 2/1/2020
Citation: Grover, C.E., Yoo, M., Lin, M., Murphy, M.D., Harker, D.B., Byers, R.L., Lipka, A.E., Hu, G., Yuan, D., Conover, J., Udall, J.A., Paterson, A.H., Gore, M.A., Wendel, J. 2020. Genetic analysis of the transition from wild to domesticated cotton (G. hirsutum L.). G3, Genes/Genomes/Genetics. 10(2):731-754.

Interpretive Summary: This publication contains details regarding the construction of a genetic map of cotton and its association with cotton fiber traits. Cotton fiber traits are often quantitative. Quantitative traits are mapped to the chromosomes using Quantitative Trait Loci (QTL) mapping. The results of this work indicate regions of the cotton genome that control cotton fiber quantitative traits. Results of this work reflect a significant contribution to ongoing efforts by cotton scientists to use modern genetics/genomics techniques to improve cotton productivity by and profitability for U.S. farmers.

Technical Abstract: The evolution and domestication of cotton is of great interest from both economic and evolutionary standpoints. Although many genetic and genomic resources have been generated for cotton, the genetic underpinnings of the transition from wild to domesticated cotton remain poorly known. Here we generated an intraspecific QTL mapping population specifically targeting the domesticated cotton fiber phenotype. We used 465 F2 individuals derived from an intraspecific cross between the wild Gossypium hirsutum var. yucatanense (TX2094) and the elite cultivar G. hirsutum cv. Acala Maxxa, in two environments, to identify 68 QTL associated with phenotypic changes under domestication. These QTL average approximately 46 Mbp in size, and together represent 29% (647 Mbp) of the 2,260 Mbp genome. Although over 70% of QTL were recovered from the A-subgenome, many key fiber QTL were detected in the D-subgenome, which was derived from a species with unspinnable fiber. We found that many QTL are environmentally labile, with only 41% shared between the two environments, indicating that QTL associated with G. hirsutum domestication are genomically clustered but environmentally labile. Possible candidate genes were recovered and discussed in the context of the phenotype. We found some support for the previously noted biased recruitment under domestication of factors from one of the two co-resident genomes of allopolyploid cotton. We conclude that the evolutionary forces that shape intraspecific divergence and domestication in cotton are complex, and that phenotypic transformations likely involved multiple interacting and environmentally responsive factors.