QTL mapping for ear tip-barrenness in maize

• Ding, Junqiang ^[1] ; Ma, Jinliang ^[1] ; Chen, Jiafa ^[1] ; Ai, Tangshun ^[1] ; Li, Zhimin ^[1] ; Tian, Zhiqiang ^[1] ; Wu, Suowei ^[1] ; Chen, Wei ^[1] ; Wu, Jianyu ^[1]
  1. [1] Henan Agricultural University

     Henan Agricultural University

     China

     
• Localización: Spanish journal of agricultural research, ISSN-e 2171-9292, ISSN 1695-971X, Vol. 14, Nº. 3, 2016
• Idioma: inglés
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• Resumen

  • 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 F2:3 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 × 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.