在小麦线中对谷物形态和产量组件的遗传剖析,其中有缺陷的谷物填充
Bingyan Liu1, Lingli Li1, Chao Fu1
1Institute of Crop Sciences, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China.
概括
研究人员确定了控制小麦谷物填充和产量的关键遗传区域 (QTL). 这些发现为通过小麦的标记器辅助育种改善谷物质量和产量提供了关键的标记.
科学领域:
- 植物遗传学 植物遗传学
- 农业科学 农业科学
- 分子生物学分子生物学
背景情况:
- 粮食填充能力对于谷物作物的产量和质量至关重要.
- 关于小麦粒填充的遗传研究是有限的.
- 缺陷的谷物填充 (DGF) 影响小麦产量.
研究的目的:
- 确定控制谷物形态和小麦产量成分的遗传位置.
- 了解缺陷谷物填充 (DGF) 的遗传基础.
- 开发用于小麦改进的与繁殖相关的标记.
主要方法:
- 从一个DGF线 (wdgf1) 和一个正常的谷物线生成了一个复合杂交 (RIL) 种群.
- 使用小麦15K SNP芯片构建了一个遗传地图.
- 在各种品种中检测到谷物特征的定量特征位置 (QTL) 和验证的标记物.
主要成果:
- 对谷物形态和产量组件确定了25个稳定的QTL,其中包括3个DGF.
- 发现了DGF的主要QTL (QDGF.caas-7A),与千粒重量的QTL.
- 确定了候选基因 (TaSus2-2B,Rht-B1),并开发了稳定的QTL.
结论:
- 在小麦中确定了谷物形态和产量特征的稳定QTL.
- 一个主要的位置控制有缺陷的谷物填充被精确地确定.
- 开发的标记物可以帮助标记物辅助育种提高小麦产量和质量.
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