Theoretical and Applied Genetics

, Volume 108, Issue 2, pp 280–291 | Cite as

Genetic mapping and QTL analysis of fiber-related traits in cotton (Gossypium)

  • M. Mei
  • N. H. Syed
  • W. Gao
  • P. M. Thaxton
  • C. W. Smith
  • D. M. Stelly
  • Z. J. ChenEmail author


Cotton, the leading natural fiber crop, is largely produced by two primary cultivated allotetraploid species known as Upland or American cotton (Gossypium hirsutum L.) and Pima or Egyptian cotton (G. barbadense L.). The allotetraploid species diverged from each other and from their diploid progenitors (A or D genome) through selection and domestication after polyploidization. To analyze cotton AD genomes and dissect agronomic traits, we have developed a genetic map in an F2 population derived from interspecific hybrids between G. hirsutum L. cv. Acala-44 and G. barbadense L. cv. Pima S-7. A total of 392 genetic loci, including 333 amplified fragment length polymorphisms (AFLPs), 47 simple sequence repeats (SSRs), and 12 restriction fragment length polymorphisms (RFLPs), were mapped in 42 linkage groups, which span 3,287 cM and cover approximately 70% of the genome. Using chromosomal aneuploid interspecific hybrids and a set of 29 RFLP and SSR framework markers, we assigned 19 linkage groups involving 223 loci to 12 chromosomes. Comparing four pairs of homoeologous chromosomes, we found that with one exception linkage distances in the A-subgenome chromosomes were larger than those in their D-subgenome homoeologues, reflecting higher recombination frequencies and/or larger chromosomes in the A subgenome. Segregation distortion was observed in 30 out of 392 loci mapped in cotton. Moreover, approximately 29% of the RFLPs behaved as dominant loci, which may result from rapid genomic changes. The cotton genetic map was used for quantitative trait loci (QTL) analysis using composite interval mapping and permutation tests. We detected seven QTLs for six fiber-related traits; five of these were distributed among A-subgenome chromosomes, the genome donor of fiber traits. The detection of QTLs in both the A subgenome in this study and the D subgenome in a previous study suggests that fiber-related traits are controlled by the genes in homoeologous genomes, which are subjected to selection and domestication. Some chromosomes contain clusters of QTLs and presumably contribute to the large amount of phenotypic variation that is present for fiber-related traits.


Quantitative Trait Locus Linkage Group Seed Weight Quantitative Trait Locus Analysis Segregation Distortion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We thank Andrew Paterson for providing DNA clones in RFLP analysis and Clint Magill and Kelly Biddle for critical suggestions on improving the manuscript. The research was supported by funds from the Texas Agricultural Experiment Station, the Texas Biotechnology Initiative (TxCOT), and Texas Higher Education Coordinating Board (Advanced Technology Program, ATP 000517-0218-2001).


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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • M. Mei
    • 1
  • N. H. Syed
    • 1
    • 3
  • W. Gao
    • 1
    • 2
  • P. M. Thaxton
    • 1
  • C. W. Smith
    • 1
    • 2
  • D. M. Stelly
    • 1
    • 2
  • Z. J. Chen
    • 1
    • 2
    Email author
  1. 1.Department of Soil and Crop SciencesTexas A&M UniversityCollege StationUSA
  2. 2.Intercollegiate Program in GeneticsTexas A&M UniversityCollege StationUSA
  3. 3.Scottish Crop Research Institute University of DundeeDundeeUK

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