Relationship between molecular marker heterozygosity and hybrid performance in intra- and interspecific hybrids of cotton
2007
Zhang, X.Q. | Wang, X.D. | Jiang, P.D. | Hua, S.J. | Zhang, H.P. | Dutt, Y.
The present study was conducted to investigate the relationship between parental molecular marker diversity and hybrid performance in both intra- and interspecific hybrids of cotton to evaluate the feasibility of predicting hybrid performance using molecular markers. Three cytoplasmic male sterile (CMS) lines were crossed with 10 restorer lines to produce 22 F₁ hybrids during 2003. Of 22 F₁s, 14 hybrids were intraspecific (Gossypium hirsutum x G. hirsutum) and eight interspecific (G. hirsutum x G. barbadense). These 22 F₁ hybrids and their parents were evaluated for yield and fibre quality traits at Zhejiang University, Hangzhou, China during 2004 and 2005. Genetic distances (GD) among the parents were calculated from 56 random-amplified polymorphic DNAs (RAPD) and 66 simple sequence repeat (SSR) marker data, and their correlation with hybrid performance and heterosis were analysed. The parents could be discriminated into G. hirsutum and G. barbadense clusters by cluster analysis based on both RAPD and SSR markers data. The correlation (r = 0.503, P
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