J Integr Plant Biol. ›› 2015, Vol. 57 ›› Issue (11): 943-953.DOI: 10.1111/jipb.12421

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Maize orthologs of rice GS5 and their trans-regulator are associated with kernel development

Jie Liu, Min Deng, Huan Guo, Sharif Raihan, Jingyun Luo, Yuancheng Xu, Xiaofei Dong and Jianbing Yan*   

  1. National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China


Genome information from model species such as rice can assist in the cloning of genes in a complex genome, such as maize. Here, we identified a maize ortholog of rice GS5 that contributes to kernel development in maize. The genome-wide association analysis of the expression levels of ZmGS5, and 15 of its 26 paralogs, identified a trans-regulator on chromosome 7, which was a BAK1-like gene. This gene that we named as ZmBAK1-7 could regulate the expression of ZmGS5 and three of the paralogs. Candidate-gene association analyses revealed that these five genes were associated with maize kernel development-related traits. Linkage analyses also detected that ZmGS5 and ZmBAK1-7 co-localized with mapped QTLs. A transgenic analysis of ZmGS5 in Arabidopsis thaliana L. showed a significant increase in seed weight and cell number, suggesting that ZmGS5 may have a conserved function among different plant species that affects seed development.


Liu J, Deng M, Guo H, Raihan S, Luo J, Xu Y, Dong X, Yan J (2015) Maize orthologs of rice GS5 and their trans-regulator are associated with kernel development. J Integr Plant Biol 57: 943–953 doi: 10.1111/jipb.12421

Key words: Association analysis, kernel development, maize, ZmBAK1-7, ZmGS5

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