Exploration and selection of elite Sd1 alleles for rice design breeding
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Exploration and selection of elite Sd1 alleles for rice design breeding Lin Zhang & Zhong Bian & Bin Ma & Xiaoyuan Li & Yiting Zou & Dong Xie & Jiyun Liu & Yonghong Ren & Changquan Zhang & Junmin Wang & Shenghai Ye & Yiwen Deng & Qun Li & Xiaoming Zhang & Zuhua He & Qiaoquan Liu
Received: 23 October 2019 / Accepted: 27 July 2020 # Springer Nature B.V. 2020
Abstract Plant height is the important determinant for the yield formation of rice, and selecting of an optimal plant height is necessary during rice breeding to achieve ideal biomass and lodging resistance. In this study, allele variation of Sd1, the well-known “green revolution” gene, was clarified as the major factor for plant height segregation in the breeding populations from an indica and japonica cross. Two null sd1 alleles (sd1N1, sd1N2) and two functional Sd1 alleles (Sd1Jap and Sd1Ind) were characterized by newly developed functional markers, which demonstrated high efficiency for genotyping a
large set of germplasms. We found that the null alleles, which were enriched in the modern indica but not japonica varieties in China, presented universal effects to shorten plant height despite the genetic backgrounds and environments. The effect of the Sd1Jap allele for plant height was weaker than that of Sd1Ind but sensitive to the genetic background of different subspecies, suggesting complex epistatic interactions between Sd1Jap and other plant height loci. In addition, Sd1Jap was identified to be compatible with some hybrid varieties recently developed in China, raising its potential value
Lin Zhang, Zhong Bian and Bin Ma contributed equally to this work. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11032-020-01161-5) contains supplementary material, which is available to authorized users. L. Zhang : Z. Bian : Y. Zou : D. Xie : C. Zhang : Q. Liu Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou 225009, China L. Zhang (*) : J. Liu : C. Zhang : Y. Deng : Q. Li : Z. He : Q. Liu (*) Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China e-mail: [email protected] e-mail: [email protected]
B. Ma : X. Li School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China J. Liu : Y. Deng : Q. Li : Z. He National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology & Ecology, Chinese Academy of Sciences, Shanghai 200032, China Y. Ren CapitalBio Technology, Beijing 101111, China J. Wang : S. Ye : X. Zhang Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
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for hybrid rice breeding. Finally, we carried out a breeding practice by introgressing the null
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