Maize orthologs of rice GS5 and their transregulator are associated with kernel development |
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Authors: | Jie Liu Min Deng Huan Guo Sharif Raihan Jingyun Luo Yuancheng Xu Xiaofei Dong and Jianbing Yan |
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Institution: | National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China |
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Abstract: | 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 genomewide association analysis of the expression levels of ZmGS5,and 15 of its 26 paralogs,identified a trans-regulator on chromosome 7,which was a BAKi-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 ZmGSs 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. |
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Keywords: | Association analysis kernel development maize ZmBAK1-7 ZmGS5 |
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