基因位置和功能基因赋予大豆在多个环境中的深播耐受性
Rui Tian1,2, Zhenqi Shao1, Hua Zhang1
1State Key Laboratory of North China Crop Improvement and Regulation, North China Key Laboratory for Crop Germplasm Resources of Education Ministry, Hebei Agricultural University, Lekai South Street 2596, Baoding, 071000, Hebei, People's Republic of China.
概括
深播增加了大豆在干旱期间的产量,通过促进 hypocotyl 延伸. 研究人员确定了两个关键基因,GmHYL05和GmHYL14,通过影响细胞扩张来调节这一关键特征.
科学领域:
- 植物遗传学和育种.
- 农学和作物科学 农学和作物科学
背景情况:
- 深度播种是改善作物生长和产量的重要农业实践,特别是在干旱压力下.
- hypocotyl 和 mesocotyl 延伸对于分别在双胞胎和单胞胎中种植苗的建立至关重要.
研究的目的:
- 在深播种条件下识别控制大豆 hypocotyl 长度的遗传位置和功能基因.
- 为了了解背后的分子机制 hypocotyl延伸增强干旱耐受性.
主要方法:
- 在深播种下的9个环境中,对500个大豆加入的低球体长度的评估.
- 全基因组关联研究 (GWAS) 使用深度重新测序数据 (20×) 识别与皮长度相关的SNP/SV.
- 候选基因 (GmHYL05和GmHYL14) 的功能验证,使用Arabidopsis中的转基因方法和大豆中的CRISPR/Cas9.
主要成果:
- 发现了2,007个与下垂体长度相关的SNP/SV,在14号和5.5号染色体上具有显著的丰富性.
- 在染色体14和5的多个环境中分别识别了630个和90个一致的SNP/SV.
- 功能验证证实,GmHYL05和GmHYL14通过增加细胞长度而不是细胞数量来增强 hypocotyl 延长,这表明它们在细胞扩张中的作用.
结论:
- 在深播种条件下,GmHYL05和GmHYL14是大豆 hypocotyl 延长的关键调节者.
- 这些基因在增强幼苗的建立和通过细胞扩张潜在的干旱耐受性方面发挥着至关重要的作用.
- 这些已识别的基因为培育大豆品种提供了有价值的标,具有更好的深播性能和应激弹性.
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