Molecular mapping and characterization of traits controlling fiber quality in cotton |
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Authors: | Russell J Kohel John Yu Yong-Ha Park Gerard R Lazo |
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Institution: | (1) Crop Germplasm Research Unit, USDA-ARS, 2765 F&B Road, College Station, TX, 77845, U.S.A.;(2) Korean Environmental Technology Research Institute, Kangnam-ku, Seoul, 135-090, Korea;(3) Western Regional Research Center, USDA-ARS, 800 Buchanan Street, Albany, CA, 94710, U.S.A. |
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Abstract: | Cotton (Gossypium spp) is the world's leading natural fiber crop. Genetic manipulation continues to play a key role in the improvement of fiber
quality properties. By use of DNA-based molecular markers and a polymorphic mapping population derived from an inter specific
cross between TM-1 (G. hirsutum) and 3-79 (G. barbadense), thirteen quantitative trait loci (QTLs) controlling fiber quality properties were identified in 3-79, an extra long staple
(ELS) cotton. Four QTLs influenced bundle fiber strength, three influenced fiber length, and six influenced fiber fineness.
These QTLs were located on different chromosomes or linkage groups and collectively explained 30% to 60%of the total phenotypic
variance for each fiber quality property in the F2 population. The effects and modes of action for the individual QTLs were characterized with 3-79 alleles in TM-1 genetic
background. The results indicated more recessive than dominant, with much less additive effect in the gene mode. Transgressive
segregation was observed for fiber fineness that could be beneficial to improvement of this trait. Molecular markers linked
to fiber quality QTLs would be most effective in marker-assisted selection (MAS) of these recessive alleles in cotton breeding
programs.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | cotton (Gossypium hirsutum L and G barbadense L ) fiber quality properties quantitative trait loci (QTLs) random amplified polymorphic DNAs (RAPDs) restriction fragment lengthpolymorphisms (RFLPs) |
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