在直接播种大米 (Oryza Sativa L.) 中确定与杂草竞争能力相关的种子活力相关的QTL集群
Shan Xu1, Yuexin Fei1, Yue Wang1
1College of Advanced Agricultural Sciences, Zhejiang A & F University, Hangzhou, 311300, Zhejiang, China.
概括
研究人员在米染色体11上发现了一个关键的基因集群,该集群显著改善了种子和苗木的活力. 这一发现可以提高直接种植大米种植的苗木支架密度和杂草竞争能力.
科学领域:
- 植物遗传学 植物遗传学
- 农作物科学 农作物科学
- 农业生物技术 农业生物技术
背景情况:
- 直接种植大米 (DSR) 种植是一种可持续的,低劳动力方法,对全球粮食安全至关重要.
- 种子活力和早期幼苗活力对于成功的DSR至关重要,影响幼苗支架密度 (SSD) 和杂草竞争能力 (WCA).
- 识别控制这些特征的遗传因素对于改善DSR系统至关重要.
研究的目的:
- 确定与米的种子活力和早期苗木活力相关的定量特征位置 (QTL).
- 精确地绘制与活力特征相关的QTL,并了解它们对DSR性能的影响.
- 为增强DSR种植提供遗传资源.
主要方法:
- 开发了使用Xiushui134 (受体) 和Yangdao6 (捐赠者) 的染色体段替代线 (CSSL).
- 用发芽率 (GP),发芽能量 (GE) 和发芽指数 (GI) 评估种子活力.
- 根数 (RN),根长度 (RL) 和长度 (SL) 的基础上评估幼苗活力,在14天内进行植入.
主要成果:
- 在四个染色体中检测到十个QTL,在Chr.上有一个显著的集群 (qGP11,qGE11,qGI11,qRL11). 11. 11. 一个人的生活.
- 精细映射将该QTL集群定位到RM26797和RM6680.0之间的0.7Mb间隔.
- QTL集群显著影响了早期活力 (水培和直接播种) 和种子活力,影响了根长度,耕机数量和干重等特征.
结论:
- 一个主要的QTL集群在米 Chr. 11控制了种子和早期苗的活力.
- 这种已识别的QTL集群是标记器辅助选择的有希望的目标,以改善DSR中的SSD和WCA.
- 在该地区利用有利的等位基因可以显著提高DSR种植效率和可持续性.
关键词:
直接种子米 (Oryza sativa L.) 是一种直接种子米.早期的活力 早期的活力定量特征位置 (QTL) 集群.种子活力 种子活力种苗支架密度 (SSD) 是指种子支架的密度.播种活力 播种活力杂草的竞争能力 (WCA)更多相关视频
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