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The Journal of Heredity 2002:93(2)
© 2002 The American Genetic Association 93:130-132

Tests of Six Cotton (Gossypium hirsutum L.) Mutants for Association with Aneuploids

R. J. Kohel, D. M. Stelly, and J. Yu

From the U.S. Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, Crop Germplasm Research Unit, 2765 F&B Road, College Station, TX 77845 (Kohel and Yu), and Texas A&M University, Soil Crop Science Department, College Station, TX 77843 (Stelly).

Address correspondence to R. J. Kohel at address above or e-mail: kohel{at}kapas.tamu.edu.

Genetic mutants are useful tools for basic and applied research to elucidate the developmental and regulatory processes of the cotton plant (Gossypium hirsutum L.). Their value is enhanced with knowledge of their location in the genome. The results of aneuploid tests used to locate mutant loci on specific chromosomes in G. hirsutum L. are reported. Thirty-four monosomes and telosomes, representing 18 of the 26 chromosomes, were used in combination with six mutants that were associated with nine loci. The mutant loci were glandless stem and boll (gl1gl6), immature fiber (im), Ligon lintless-2 (Li2), methylation (me), nonpinking (np1np2), and Raimondal (Ra1Ra2). We found that im was associated with chromosome 3 that contains linkage group VI (accessory involucre and frego bract); Li2 was associated with chromosome 18 that contains linkage group XVI (open bud and yellow pollen-2); and me was associated with chromosome 9. The remaining three mutants were not associated with the aneuploids in the tests. Knowledge of these chromosome assignments provides a valuable reference for specific studies of mutants and for further genome mapping efforts.


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