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United States Department of Agriculture

Agricultural Research Service

Research Project: Developing Genomic and Genetic Tools for Exploiting Cotton Genetic Variation

Location: Crop Germplasm Research

Title: Toward cotton molecular breeding: challenges and opportunities

Authors
item Yu, John
item Young, Carla Jo Logan -
item Pepper, Alan -
item Li, Fuguang -
item Yu, Shuxun -
item Buyyarapu, Ramesh -
item Sharma, Govind -
item Hinze, Lori
item Percy, Richard

Submitted to: Plant and Animal Genome Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: December 1, 2013
Publication Date: N/A

Technical Abstract: Cotton (Gossypium spp) is the leading natural fiber in the global textile market, but progress in the development and applications of molecular tools to improve cotton lags behind other major crop plants. The slow progress is in part due to cotton's large complex allotetraploid genome of 26 partially homoeologous chromosomes. Recently we have made significant progress in understanding the allotetraploid genome by: 1) mapping it with SSR and SNP markers, 2) sequencing its two diploid progenitor genomes, and 3) analyzing the genetic variation within and between the Gossypium genomes. Currently, the simultaneous discovery and mapping of genes/loci via genotyping by sequencing (GBS) and other new technologies are accelerating the development of genetic tools and associated knowledge essential for cotton molecular breeding. One example of the potential exploitation of abundant but underutilized genetic diversity in the Gossypium germplasm lies within the floral regulatory gene network in cotton. Various orthologous and paralogous loci in the cotton genomes can be identified using long-read next-generation sequencing (NGS). A number of chromosomal segments in the genomes contain desirable genes for enhanced performance of cotton yield and quality. Innovative designs for cotton genetic improvement through genomics-assisted techniques are necessary and will be discussed, especially in light of the forthcoming reference sequence of whole allotetraploid cotton genome (G. hirsutum).

Last Modified: 10/30/2014
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