Characterization of a naturally occurring early-flowering rice mutant resulting from a novel variation in the Ghd7 locus

Wen Li, Chongke Zheng, Jinjun Zhou, Zhizhen Zhang, Guanhua Zhou and Xianzhi Xie
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Wen Li: Shandong Rice Engineering Technology Research Center, Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan, P.R. China
Chongke Zheng: Shandong Rice Engineering Technology Research Center, Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan, P.R. China
Jinjun Zhou: Shandong Rice Engineering Technology Research Center, Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan, P.R. China
Zhizhen Zhang: Shandong Rice Engineering Technology Research Center, Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan, P.R. China
Guanhua Zhou: Shandong Rice Engineering Technology Research Center, Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan, P.R. China
Xianzhi Xie: Shandong Rice Engineering Technology Research Center, Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan, P.R. China

Czech Journal of Genetics and Plant Breeding, 2021, vol. 57, issue 4, 166-169

Abstract: Rice is one of the main staple food crops and is consumed by more than half of the global population. Optimizing the flowering time may help to maximize grain production. In this study, we characterized a rice mutant, Zixiangnuo early-flowering mutant (ZXN-E). Compared with the wild-type variety, Zixiangnuo (ZXN), the mutant plants flowered earlier, were shorter and produced smaller panicles. Bulked segregant analysis revealed a 7-bp deletion in the first exon of the Grain number, plant height, and heading date 7 (Ghd7) locus. The allele with the 7-bp deletion was not detected in the rice varieties included in the 3 000 Rice Genomes Project. Thus, the 7-bp deletion identified in the naturally occurring mutant ZXN-E is a novel variation. Our findings suggest that ZXN-E may be a useful germplasm for breeding new rice varieties.

Keywords: bulked segregant analysis; flowering time; Ghd7; rice (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjg:v:57:y:2021:i:4:id:36-2021-cjgpb

DOI: 10.17221/36/2021-CJGPB

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