Molecular characterization of a novel photoperiod-insensitive allele Ppd-B1a.3 and its effect on heading date in Chinese wheat (Triticum aestivum) cultivar Qingchun 37
文献类型： 外文期刊
作者： Song, Tianqi 1 ; Shi, Caiyin 1 ; Wang, Yukun 1 ; Guo, Sihai 1 ; Zhang, Weijun 2 ; Wang, Xiaoxing 3 ; Zhou, Jianfei 1 ; Bu, Yaning 1 ; Li, Siyi 1 ; Fan, Qiru 1 ; Wei, Fan 1 ; Xiang, Jishan 3 ; Chen, Dongsheng 2 ; Zhang, Xiaoke 1 ;
作者机构： 1.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
2.Ningxia Acad Agr & Forestry Sci, Crop Res Inst, Yinchuan 750002, Ningxia, Peoples R China
3.Yili Normal Univ, Coll Biol Sci & Technol, Yili 830500, Xinjiang, Peoples R China
4.Yili Normal Univ, Xinjiang Key Lab Lavender Conservat & Utilizat, Yili 830500, Xinjiang, Peoples R China
关键词：
Allelic variant; Heading date; Photoperiod gene;
期刊名称：JOURNAL OF PLANT RESEARCH （ 影响因子：2.3； 五年影响因子：2.9 ）
ISSN： 0918-9440
年卷期： 2024 年
页码：
收录情况： SCI
摘要： Breeders adjust wheat heading dates to improve regional adaptability and reduce or mitigate yield losses caused by meteorological disasters, pests and diseases. The Ppd-1 genes play a crucial role in determining wheat sensitivity to changes in day-length and serve as key regulators of heading dates once the vernalization requirement is satisfied. In this study, we identified a new allelic variant of the promoter region, Ppd-B1a.3, in the Chinese wheat cultivar Qingchun 37. Compared to the Ppd-B1b.1 (carried by Chihokukomugi), the main mutation sites in Ppd-B1a.3 include a substitution of C with G at the -505-bp, a T base insertion at the -625-bp, a mutation of TCG to GGT at the -632 to -634-bp, and a 163-bp insertion at the -691 bp. Analysis of F2 populations indicated that Ppd-B1a.3 promotes heading and flowering (approximately 6 days earlier in population 1 and 17 days in population 2) under short-day conditions in a greenhouse. However, the evaluation of Ppd-B1a.3's effect under field conditions may be influenced by the copy number of the Ppd-B1 locus inherited from the other parent in the F2 populations. Ppd-B1a.3 disrupts circadian rhythm expression and exhibits a stronger effect on heading and flowering than the three-copy Ppd-B1 allele carried by Jing 411. Origin analysis suggests that Ppd-B1a.3 may have derived from non-native germplasm. These results deepen our understanding of wheat photoperiod genes and provide useful genetic resources for fine-tuning wheat heading dates during breeding.
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