Development and Characterization of Near-Isogenic Lines Derived from Synthetic Wheat Revealing the 2 kb Insertion in the PPD-D1 Gene Responsible for Heading Delay and Grain Number Improvement
文献类型： 外文期刊
作者： Ning, Shunzong 1 ; Li, Shengke 1 ; Xu, Kai 2 ; Liu, Dongmei 2 ; Ma, Li 2 ; Ma, Chunfang 2 ; Hao, Ming 2 ; Zhang, Lianquan 1 ; Chen, Wenjie 3 ; Zhang, Bo 3 ; Jiang, Yun 4 ; Huang, Lin 2 ; Chen, Xuejiao 2 ; Jiang, Bo 2 ; Yuan, Zhongwei 2 ; Liu, Dengcai 1 ;
作者机构： 1.Sichuan Agr Univ, State Key Lab Crop Gene Explorat & Utilizat Southw, Chengdu 611130, Peoples R China
2.Sichuan Agr Univ, Triticeae Res Inst, Chengdu 611130, Peoples R China
3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
4.Sichuan Acad Agr Sci, Biotechnol & Nucl Technol Res Inst, Chengdu 610061, Peoples R China
关键词： synthetic wheat; photoperiod-1; number of days to heading; grain number per spike; spike length; spikelet number per spike
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）
ISSN： 1661-6596
年卷期： 2023 年 24 卷 13 期
页码：
收录情况： SCI
摘要： Spikelet number and grain number per spike are two crucial and correlated traits for grain yield in wheat. Photoperiod-1 (Ppd-1) is a key regulator of inflorescence architecture and spikelet formation in wheat. In this study, near-isogenic lines derived from the cross of a synthetic hexaploid wheat and commercial cultivars generated by double top-cross and two-phase selection were evaluated for the number of days to heading and other agronomic traits. The results showed that heading time segregation was conferred by a single incomplete dominant gene PPD-D1, and the 2 kb insertion in the promoter region was responsible for the delay in heading. Meanwhile, slightly delayed heading plants and later heading plants obviously have advantages in grain number and spikelet number of the main spike compared with early heading plants. Utilization of PPD-D1 photoperiod sensitivity phenotype as a potential means to increase wheat yield potential.
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