Short communication: QTL mapping for ear tip-barrenness in maize
SPANISH JOURNAL OF AGRICULTURAL RESEARCH(2016)
摘要
Barren tip on corn ear is an important agronomic trait in maize, which is highly associated with grain yield. Understanding the genetic basis of tip-barrenness may help to reduce the ear tip-barrenness in breeding programs. In this study, ear tip-barrenness was evaluated in two environments in a F-2:3 population, and it showed significant genotypic variation for ear tip-barrenness in both environments. Using mixed-model composite interval mapping method, three additive effects quantitative trait loci (QTL) for ear tip-barrenness were mapped on chromosomes 2, 3 and 6, respectively. They explained 16.6% of the phenotypic variation, and no significant QTL x Environment interactions and digenic interactions were detected. The results indicated that additive effect was the main genetic basis for ear tip-barrenness in maize. This is the first report of QTL mapped for ear tip-barrenness in maize. Additional key words: quantitative trait loci; Zea mays (L.); mixed-model composite interval mapping; SSR.
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关键词
quantitative trait loci,Zea mays (L.),mixed-model composite interval mapping,SSR
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