Theoretical and Applied Genetics

, Volume 100, Issue 3–4, pp 409–418

QTL analysis of leaf morphology in tetraploid Gossypium (cotton)

  • C. Jiang
  • R. J. Wright
  • S. S. Woo
  • T. A. DelMonte
  • A. H. Paterson
Original Article

Abstract 

Molecular markers were used to map and characterize quantitative trait loci (QTLs) determining cotton leaf morphology and other traits, in 180 F2 plants from an interspecific cross between a Gossypium hirsutum genotype carrying four morphological mutants, and a wild-type Gossypium barbadense. The prominent effects of a single region of chromosome 15, presumably the classical ”Okra-leaf” locus, were modified by QTLs on several other chromosomes affecting leaf size and shape. For most traits, each parent contained some alleles with positive effects and others with negative effects, suggesting a large potential for adapting leaf size and shape to the needs of particular production regimes. Twenty one QTLs/loci were found for the morphological traits at LOD≥3.0 and P≤0.001, among which 14 (63.6%) mapped to D-subgenome chromosomes. Forty one more possible QTLs/loci were suggested with 2.0≤LOD<3.0 and 0.001<P≤0.01. Among all of the 62 possible QTLs (found at LOD≥2.0 and P≤0.01) for the 14 morphological traits in this study, 38 (61.3%) mapped to D-subgenome chromosomes. This reinforces the findings of several other studies in suggesting that the D-subgenome of tetraploid cotton has been subject to a relatively greater rate of evolution than the A-subgenome, subsequent to polyploid formation.

Key words DNA markers Quantitative trait loci (QTLs) Morphological traits Okra leaf Polyploid formation 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • C. Jiang
    • 1
  • R. J. Wright
    • 1
  • S. S. Woo
    • 1
  • T. A. DelMonte
    • 1
  • A. H. Paterson
    • 1
  1. 1.Plant Genome Mapping Laboratory, Department of Soil and Crop Science, Texas A&M University, College Station, Texas 77843-2474, USAUS
  2. 2.Garstseeds, Slater IA, USAUS
  3. 3.Agrevo, Leland, MS 38756, USAUS
  4. 4.Dept. Agronomy, Konkuk University, Seoul, South KoreaKR
  5. 5.Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USAUS
  6. 6.Department of Crop and Soil Science, University of Georgia, Athens, GA 30602, USAGE

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