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Acta Agron Sin ›› 2017, Vol. 43 ›› Issue (05): 678-690.doi: 10.3724/SP.J.1006.2017.00678


Mapping of QTLs and Heterotic Loci for Flowering Time-related Traits in Maize

YANG Hui-Li1,LIN Ya-Nan1,ZHANG Huai-Sheng1,WEI Xiao-Yi2,DING Dong1,XUE Ya-Dong1,*   

  1. 1 College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China; 2 Xinxiang Academy of Agricultural Sciences, Xinxiang 453003, China
  • Received:2016-06-04 Revised:2016-11-02 Online:2017-05-12 Published:2016-11-25
  • Contact: Xue Yadong, E-mail: yadongxue@aliyun.com, Tel: 0371-63558122 E-mail:yanghuili000@126.com
  • Supported by:

    This study was supported by the National Natural Science Foundation of China (31271732) and the National Key Basic Research Program (2014CB138203).


Flowering is an important trait in maize evolution and adaptation. Dissecting the genetic basis of heterosis of flowering will promote the selection for elite hybrids adapted to different ecosystems. In this study, a panel of 203 single segment substitution lines (SSSLs) and its testcross population derived from an elite inbred line Xu178 as recipient parent and inbred line Zong3 as donor parent, were applied for mapping flowering time-related traits in maize. Flowering time-related traits, including days to anthesis (DTA), days to silk (DTA) and anthesis-to-silking interval (ASI), were scored in the two populations at three locations in two years. A total of 40 quantitative trait loci (QTLs) and 37 heterosis loci (HLs) for flowering-related traits were detected. Of them, six QTLs and four HLs were detected at the three locations simultaneously. Of all detected chromosomal regions, there were 11 regions in which the genes affected both flowering time-related QTLs and HLs.

Key words: Maize, Single segment substitution line, Flowering time, QTL, Heterosis

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