ARS | Publication request: MOLECULAR TAGGING OF A MAJOR QTL FOR FIBER STRENGTH IN UPLAND COTTON AND INTO MARKER ASSISTED SELECTION

Submitted to: Theoretical and Applied Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: November 22, 2002
Publication Date: August 10, 2003
Citation: Zhang, T., Yuan, Y., Yu, J., Guo, W., Kohel, R.J. 2003. Molecular tagging of a major QTL for fiber strength in upland cotton and its marker-assisted selection. Theoretical and Applied Genetics. 106:262-268.

Technical Abstract: Fiber is a basic raw material in the textile industry. The changes in spinning technology have in common the requirement of unique and often greater cotton fiber quality, especially strength, for processing. We used a G. anomalum introgression line, 7235, characterized as good fiber quality properties, to identify molecular markers linked to fiber strength QTLs. By use of F2 and F3 populations derived from a cross between 7235 and TM-1, a genetic standard of Upland cotton, nine molecular markers, 3 SSRs and 6 RAPDs, were identified to be linked to two QTLs for fiber strength. One was a major QTL, QTLFS1, detected both in Nanjing and Hainan, China and College Station, USA. It was found to be associated with 8 markers and explained more than 30% of the phenotypic variation. The QTLFS1 was mapped to chromosome 10. The major QTL in 7235 was identified to be transferred from an Acala 3080 cotton. The marker assisted-selection in increasing fiber strength of commercial cultivars.