Dissection of the genetic basis of heterosis in an elite maize hybrid by QTL mapping in an immortalized F2 population.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Jihua TangJiansheng Li

Abstract

The genetic basis of heterosis for grain yield and its components was investigated at the single- and two-locus levels using molecular markers with an immortalized F(2) (IF(2)) population, which was developed by pair crosses among recombinant inbred lines (RILs) derived from the elite maize hybrid Yuyu22. Mid-parent heterosis of each cross in the IF(2) population was used to map heterotic quantitative trait loci. A total of 13 heterotic loci (HL) were detected. These included three HL for grain yield, seven for ear length, one for ear row number and two for 100-kernel weight. A total of 143 digenic interactions contributing to mid-parent heterosis were detected at the two-locus level involving all three types of interactions (additive x additive = AA, additive x dominance = AD or DA, dominance x dominance = DD). There were 25 digenic interactions for grain yield, 36 for ear length, 31 for ear row number and 51 for 100-kernel weight. Altogether, dominance effects of HL at the single-locus level as well as AA interactions played an important role in the genetic basis of heterosis for grain yield and its components in Yuyu22.

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Citations

Sep 29, 2012·Proceedings of the National Academy of Sciences of the United States of America·Gang ZhouQifa Zhang
May 21, 2014·Journal of Genetics·Qingzhi LiangJinping Hua
Aug 12, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Tingting GuoJianbing Yan
Sep 14, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Tingting GuoJiankang Wang
Mar 16, 2013·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Guodong ZhangZeli Wang
Apr 6, 2012·Current Opinion in Plant Biology·Eyal Fridman, Dani Zamir
Jul 21, 2015·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Lei LiuZuxin Zhang
Mar 3, 2011·Proteomics·Zhiyuan FuJihua Tang
Apr 11, 2013·Journal of Integrative Plant Biology·Xian GuoTianzhen Zhang
Mar 24, 2016·BMC Plant Biology·Xiangyuan WuJihua Tang
Jul 22, 2014·Journal of Integrative Plant Biology·Guojing ShenYongzhong Xing
Sep 10, 2015·Proceedings of the National Academy of Sciences of the United States of America·Xin LiJianming Yu
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May 4, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Lianguang ShangJinping Hua
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