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Acta Agron Sin ›› 2016, Vol. 42 ›› Issue (04): 482-491.doi: 10.3724/SP.J.1006.2016.00482


Identification of Heterotic Loci for Yield and Ear Traits Using CSSL Test Population in Maize

PENG Qian**,XUE Ya-Dong**,ZHANG Xiang-Ge,LI Hui-Min,SUN Gao-Yang,LI Wei-Hua,XIE Hui-Ling,TANG Ji-Hua*   

  1. Key Laboratory of Wheat and Maize Crops Science / Collaborative Innovation Center of Henan Grain Crops/ College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2015-07-04 Revised:2016-01-11 Online:2016-04-12 Published:2016-01-26
  • Contact: 汤继华, E-mail: tangjihua1@163.com, Tel: 0371-63558377. E-mail:18613706657@163.com
  • Supported by:

    This study was supported by the National Natural Science Foundation of China.


Heterosis plays an important role in enhancingcrop yield and quality.Dissecting the genetic basis of heterosis can promote hybrid maize selection, however that is unclear up to now. In this study, a set of chromosome segment substitution lines (CSSLs) population,which was constructed using the inbred line lx9801 as the receptor parent and the inbred line Chang7-2 as the donor parent, was crossed with the inbred line T7296 to construct the corresponding test population. The test population was used to identify the heterotic loci (HL) for grain yield and ear traits in maize,which showed significant difference inheterosisbetween the corresponding chromosomal region of the inbred line Chang7-2 and lx9801as well as the test inbred line T7296. A total of 64HL were identified for gain yield and ear traits, and among them 23 HL were identified at the two environments simultaneously, including 4 HL for ear length, 4 HL for ear width, 4 HL for row number, 7 HL for kernels per row, and 4HL for grain yield. Additionally, the HL for both grain yield and its components simultaneously were found on many chromosomal regions.This study could offer a basic material for thoroughly dissecting the genetic basis of heterosis for grain yield and its components in maize.

Key words: Maize, Chromosome segment substitution lines, Grain yield, Heterosis, Quantitative trait loci

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