TaZIM-A1 negatively regulates flowering time in common wheat (Triticum aestivum L.)

文献类型： 外文期刊

第一作者： Liu, Hong

作者： Liu, Hong;Zhang, Xueyong;Liu, Hong;Li, Tian;Wang, Yamei;Zheng, Jun;Li, Huifang;Hao, Chenyang;Zhang, Xueyong

作者机构：

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）

ISSN： 1672-9072

年卷期： 2019 年 61 卷 3 期

页码：

收录情况： SCI

摘要： Flowering time is a critical determinant of regional adaptation for crops and has strong effects on crop yields. Here, we report that TaZIM-A1, an atypical GATA-like transcription factor, is a negative regulator of flowering in wheat. TaZIM-A1 possessed weak transcriptional repression activity, with its CCT domain functioning as the major inhibitory region. TaZIM-A1 expression exhibited a typical circadian oscillation pattern under various light regimes. Overexpression of TaZIM-A1 caused a delay in flowering time and a decrease in thousand-kernel weight (TKW) in wheat under long-day conditions. Moreover, TaZIM-A1 directly bound to the promoters of TaCO-1 and TaFT-1 and downregulated their expression. Sequence analysis of a collection of common wheat cultivars identified three and two haplotypes for TaZIM-A1 and TaZIM-B1, respectively. Association analysis revealed that TaZIM-A1-HapI/-HapIII and TaZIM-B1-HapI have undergone strong positive selection during modern wheat breeding, likely due to their association with earlier heading and higher TKW. Diagnostic markers were developed for these haplotypes that can be used for wheat cultivar improvement, via marker-assisted breeding.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序