Chinese Science Bulletin

, Volume 52, Issue 4, pp 477–483 | Cite as

Detection of quantitative trait loci and heterotic loci for plant height using an immortalized F2 population in maize

  • Tang JiHua 
  • Ma XiQing 
  • Teng WenTao 
  • Yan JianBing 
  • Wu WeiRen 
  • Dai JingRui 
  • Li JianSheng 
Articles

Abstract

A set of recombinant inbred lines (RIL) derived from Yuyu22, an elite hybrid widespread in China, was used to construct an immortalized F2 (IF2) population comprising 441 different crosses. Genetic linkage maps were constructed containing 10 linkages groups with 263 simple sequence repeat (SSR) molecular markers. Twelve and ten quantitative trait loci (QTL) were detected for plant height in the IF2 and RIL populations respectively, using the composite interval mapping method, and six same QTL were identified in the two populations. In addition, ten unique heterotic loci (HL) located on seven different chromosomes were revealed for plant height using the mid-parent heterosis as the input data. These HL explained 1.26%–8.41% of the genotypic variance in plant height heterosis and most expressed overdominant effects. Only three QTL and HL were located in the same chromosomal region, it implied that plant height and its heterosis might be controlled by two types of genetic mechanisms.

Keywords

maize plant height heterotic loci QTL detection 

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Copyright information

© Science in China Press 2007

Authors and Affiliations

  • Tang JiHua 
    • 1
    • 2
  • Ma XiQing 
    • 1
  • Teng WenTao 
    • 1
  • Yan JianBing 
    • 1
  • Wu WeiRen 
    • 3
  • Dai JingRui 
    • 1
  • Li JianSheng 
    • 1
  1. 1.National Maize Improvement Center of ChinaChina Agricultural UniversityBeijingChina
  2. 2.College of AgronomyHenan Agricultural UniversityZhengzhouChina
  3. 3.Institute of BioinformaticsZhejiang UniversityHangzhouChina

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