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Journal of Heredity Advance Access originally published online on September 13, 2005
Journal of Heredity 2005 96(6):644-653; doi:10.1093/jhered/esi097
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Published by Oxford University Press on behalf of the American Genetic Association 2005.

Simple Sequence Repeat Marker Associated with a Natural Leaf Defoliation Trait in Tetraploid Cotton

I. Y. Abdurakhmonov, A. A. Abdullaev, S. Saha, Z. T. Buriev, D. Arslanov, Z. Kuryazov, G. T. Mavlonov, S. M. Rizaeva, U. K. Reddy, J. N. Jenkins, A. Abdullaev, and A. Abdukarimov

Laboratory of Genetic Engineering and Biotechnology, Institute of Genetics and Plant Experimental Biology, Academy of Sciences of Uzbekistan, Yuqori Yuz, Qibray Region, Tashkent District, 702151 Uzbekistan (Abdurakhmonov, Abdullaev, Buriev, Arslanov, Kuryazov, Mavlonov, Rizaeva, Abdullaev, Abdukarimov); USDA-ARS, Crop Science Research Laboratory, Genetics and Precision Agriculture Research Unit, P.O. Box 5367, 8120 Highway 12E, Mississippi State, MS 39762 (Saha and Jenkins); and Department of Biology, 103 Hamblin Hall, West Virginia State University, Institute, WV 25112 (Reddy)

Address correspondence to I. Y. Abdurakhmonov at the address above, or e-mail: ibrokhim_a{at}yahoo.com.

Cotton (Gossypium hirsutum L.) leaf defoliation has a significant ecological and economical impact on cotton production. Thus the utilization of a natural leaf defoliation trait, which exists in wild diploid cotton species, in the development of tetraploid cultivated cotton will not only be cost effective, but will also facilitate production of very high-grade fiber. The primary goal of our research was to tag loci associated with natural leaf defoliation using microsatellite markers in Upland cotton. The F2 populations developed from reciprocal crosses between the two parental cotton lines—AN-Boyovut-2 (2n = 52), a late leaf defoliating type, and Listopad Beliy (2n = 52), a naturally early leaf defoliating type—demonstrated that the naturally early leaf defoliation trait has heritability values of 0.74 and 0.84 in the reciprocal F2 population. The observed phenotypic segregation difference in reciprocal crosses suggested a minor cytoplasmic effect in the phenotypic expression of the naturally early leaf defoliation trait. Results from the Kruskal-Wallis (KW) nonparametric test revealed that JESPR-13 (KW = 6.17), JESPR-153 (KW = 9.97), and JESPR-178 (KW = 13.45) Simple sequence repeat (SSR) markers are significantly associated with natural leaf defoliation in the mapping population having stable estimates at empirically obtained critical thresholds (P < .05–.0001). JESPR-178 revealed the highest estimates (P < .0001) for association with the natural leaf defoliation trait, exceeding maximum empirical threshold values. JESPR-178 was assigned to the short arm of chromosome 18, suggesting indirectly that genes associated with natural leaf defoliation might be located on this chromosome. This microsatellite marker may have the potential for use to introgress the naturally early leaf defoliation quantitative trait loci (QTL) from the donor line Listopad Beliy to commercial varieties of cotton through marker-assisted selection programs.


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This article has been cited by other articles:


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