J Integr Plant Biol. ›› 2013, Vol. 55 ›› Issue (8): 759-774.DOI: 10.1111/jipb.12054

• Molecular Ecology and Evolution • Previous Articles     Next Articles

Mapping Heterotic Loci for Yield and Agronomic Traits Using Chromosome Segment Introgression Lines in Cotton

Xian Guo1‡, Yuping Guo1‡, Jun Ma1, Fang Wang1, Mizhen Sun1, Lijuan Gui1, Jiajia Zhou1, Xianliang Song1*, Xuezhen Sun1* and Tianzhen Zhang2*   

  1. 1College of Agronomy/National Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an 271018, China
    2National Key Laboratory of Crop Genetics and Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2012-12-21 Accepted:2013-03-14 Published:2013-08-11
  • About author:***Corresponding author Tel: +86-538-8242309; E-mail: songxl999@163.com Tel: + 86-538-8242487; E-mail: sunxz@sdau.edu.cn Tel: +86-25-84395307; E-mail: cotton@njau.edu.cn
    Co-Editor: Catherine Kidner
    These authors contributed equally to this work.

Abstract:

In the present study, a set of chromosome segment introgression lines (CSILs) using Gossypium hirsutum L. TM-1 as the recipient parent and G. barbadense Hai7124 as the donor parent were used to explore the genetic basis of heterosis for interspecific hybrids. Two sets of F1 populations individually derived from CSILs crossing with both parents were configured to investigate heterotic loci (HL) and substitution effect loci (SL). A total of 58 HL and 39 SL were identified in 3 years. One stable HL, hLP-A4-3, could be detected in all 3 years. Three HLs, hBS-A8-1, hLP-D6-1, and hSI-D7-11, could be detected in 2 years. Four SLs, sBS-D7-1, sLP-A8-1, sLP-D7-1, and sLP-D12-1, could be detected in 2 years. HL and SL tended to be distributed in some HL-rich chromosome segments with close positions. Compared with QTL detected in a former study, HL showed little overlap with QTL, indicating that trait phenotype and heterosis might be controlled by different sets of loci. All three forms of genetic effects (partial-, full-, over-dominant) were identified, while the over-dominant effect made the main contribution to heterosis. These results may help lay the foundation for clarifying the heredity mechanism of heterosis in cotton.

Guo X, Guo Y, Ma J, Wang F, Sun M, Gui L, Zhou J, Song X, Sun X, Zhang T (2013) Mapping heterotic loci for yield and agronomic traits using chromosome segment introgression lines in cotton. J. Integr. Plant Biol. 55(8), 759–774.

Key words: Cotton, chromosome segment introgression lines, heterosis, heterotic loci

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