Working group session:
Germplasm and Genetic Stocks
Presentation type:
oral
Authors:
Zhanfeng, Si; Tianzhen, Zhang
Presenter:
Zhanfeng, Si
Correspondent:
Tianzhen, Zhang
Abstract:
The extra long staple cotton (G. barbadense) is characterized by its excellent fiber qualities and low yield, while Upland cotton (G. hirsutum) is characterized by its high yield and moderate fiber quality performance. In this study, we developed G. hirsutum chromosome segment substitution lines (CSSL) cotton in G. barbadense cv. Xinhai 25 by repeatedly backcrossing and selfing. Difference between these lines and their recipient parent is very small at genomic level. It is an ideal material for genome research especially for cotton yield QTL mapping. We investigated yield traits of these lines in 2013 in Aksu, Xinjiang Uygur Autonomous Region, and used molecular marker-assisted selection (MAS) to screen out several G. hirsutum chromosome segment substitution lines which have significantly better yield traits than the recipient parent in boll weight (BW) or lint percentage (LP). Two lines with boll weight (BW) and lint percentage (LP) higher than their recipient parent Xinhai #25 by 17.9% and 10.8%, respectively, and as the same as the extra long staple fiber qualities as Xinhai #25 were developed. How genomic selection to increase G. barbadense yield by introgressed G. hirsutum segments is discussed.