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TaWOX14在小麦遗传转化中的功能。

The function of TaWOX14 in wheat genetic transformation.

作者信息

Wang Dan, Guo Yajie, Liu Mengtian, Liu Huiyun

机构信息

College of Agronomy and the State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, Henan, China.

出版信息

Plant Cell Rep. 2025 Jul 14;44(8):176. doi: 10.1007/s00299-025-03545-3.

Abstract

Overexpression of TaWOX14 can significantly improve the genetic transformation and genome editing efficiencies of some wheat immature embryos, and TaPLD serves as a promising candidate gene for haploid induction in wheat. Genetic transformation and genome editing systems have the potential for accelerating the breeding process in crops. However, their effectiveness is often limited by the regeneration efficiency of explants. The WUSCHEL-related homeobox (WOX) family, a group of plant-specific transcription factors, plays a crucial role in somatic embryogenesis. In wheat, WOX genes are categorized into three clades: ancient, intermediate, and WUS. In this study, we systematically analyzed the function of the WUS clade genes in wheat transformation. Our results demonstrated that overexpression of TaWOX14 significantly improved genetic transformation efficiencies in several wheat genotypes, including Fielder, Kenong199, Zhengmai7698, and Yangmai13. Furthermore, by combining the CRISPR-Cas9 system with TaWOX14, we observed enhanced genome editing efficiency in the wheat variety Fielder. Additionally, we explored the potential of TaPLD as a candidate gene for haploid induction in wheat. Based on the amino acid sequence of Zea mays PHOSPHOLIPASE D3 (ZmPLD3), we edited its homologs in wheat and identified a TaPLD-edited plant with a ploidy level intermediate between haploid and hexaploid. Overall, these findings are expected to accelerate the wheat breeding process by improving genetic transformation efficiency and identifying a potential haploid induction gene. Future research will focus on further characterizing the mechanisms of TaWOX14 and TaPLD, and exploring their applications in breeding programs.

摘要

TaWOX14的过表达能够显著提高一些小麦未成熟胚的遗传转化和基因组编辑效率,并且TaPLD有望成为小麦单倍体诱导的候选基因。遗传转化和基因组编辑系统具有加速作物育种进程的潜力。然而,它们的有效性常常受到外植体再生效率的限制。WUSCHEL相关同源异型框(WOX)家族是一组植物特有的转录因子,在体细胞胚胎发生中起关键作用。在小麦中,WOX基因被分为三个进化枝:古老进化枝、中间进化枝和WUS进化枝。在本研究中,我们系统地分析了WUS进化枝基因在小麦转化中的功能。我们的结果表明,TaWOX14的过表达显著提高了包括费尔德、科农199、郑麦7698和扬麦13在内的几种小麦基因型的遗传转化效率。此外,通过将CRISPR-Cas9系统与TaWOX14相结合,我们在小麦品种费尔德中观察到基因组编辑效率得到提高。此外,我们还探索了TaPLD作为小麦单倍体诱导候选基因的潜力。基于玉米磷脂酶D3(ZmPLD3)的氨基酸序列,我们对其在小麦中的同源基因进行编辑,并鉴定出一株倍性水平介于单倍体和六倍体之间的TaPLD编辑植株。总体而言,这些发现有望通过提高遗传转化效率和鉴定潜在的单倍体诱导基因来加速小麦育种进程。未来的研究将集中于进一步阐明TaWOX14和TaPLD的作用机制,并探索它们在育种计划中的应用。

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