Three QTL from Oryza meridionalis Could Improve Panicle Architecture in Asian Cultivated Rice

Rice

Research

Zhijuan Wu¹  Ying Yang²  Dayun Tao²  Yu Zhang²  Jiawu Zhou²  Qiuhong Pu²  Xianneng Deng²  Wei Deng²  Jing Li²  Yonggang Lv²  Peng Xu³  Sheikh Maniruzzaman⁴  Walid HassanAli Soliman Elgamal⁵ 

[1] School of Life Sciences, Yunnan University, 650091, Kunming, China;Yunnan Key Laboratory for Rice Genetic Improvement, Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, 650200, Kunming, China;Yunnan Key Laboratory for Rice Genetic Improvement, Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, 650200, Kunming, China;Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 650233, Kunming, China;Yunnan Key Laboratory for Rice Genetic Improvement, Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, 650200, Kunming, China;Plant Breeding Division, Bangladesh Rice Research Institute, 1701, Gazipur, Bangladesh;Yunnan Key Laboratory for Rice Genetic Improvement, Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, 650200, Kunming, China;Rice Research Department, Field Crops Research Institute, Agricultural Research Center, 33717, Sakha, Egypt;

关键词: Rice;    Panicle architecture;    Oryza meridionalis;    QTL mapping;    Near isogenic line (NIL);   

DOI  :  10.1186/s12284-023-00640-5

 received in 2022-08-03, accepted in 2023-04-20,  发布年份 2023

来源: Springer

【 摘 要 】

Rice panicle architecture is directly associated with grain yield and is also the key target in high-yield rice breeding program. In this study, three BC6F2 segregation populations derived from the crosses between two accessions of Oryza meridionalis and a O. sativa spp. japonica cultivar Dianjingyou 1, were employed to map QTL for panicle architecture. Three QTL, EP4.2, DEP7 and DEP8 were identified and validated using substitution mapping strategy on chromosome 4, 9 and 8, respectively. The three QTL showed pleiotropic phenotype on panicle length (PL), grain number per panicle (GNPP), number of primary branches (NPB), number of secondary branches (NSB), and grain width. DEP7 and DEP8 showed yield-enhancing potential by increasing GNPP, NPB and NSB, while EP4.2 exhibited wide grain, short stalk and panicle which can improve plant and panicle architecture, too. Moreover, epistatic interaction for PL was detected between EP4.2 and DEP7, and epistatic analysis between DEP7 and DEP8 for GNPP and NPB also revealed significant two QTL interactions. The result would help us understand the molecular basis of panicle architecture and lay the foundation for using these three QTL in rice breeding.

【 授权许可】

CC BY   
© The Author(s) 2023

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