基于CSSL-Z403及其剖析的单段和双段替代线的米粒大小QTL的遗传效应分析
Guangyi Xu1, Keli Deng1, Jinjin Yu1
1Rice Research Institute, Academy of Agricultural Science, Engineering Research Center of South Upland Agriculture, Ministry of Education, Southwest University, Chongqing 400715, China.
研究人员使用分子标记物识别了一种大粒大米 (CSSL-Z403) 品种. 他们为谷粒大小绘制了六个定量特征位点 (QTL),并构建了新的线条,发现了控制大米谷粒重量和大小的潜在的新型QTL.
科学领域:
- 植物遗传学 植物遗传学
- 农作物科学 农作物科学
- 分子育种是一种分子育种.
背景情况:
- 诸如大米的粒度大小等定量特征对于提高产量至关重要.
- 染色体段替代线 (CSSL) 是解剖复杂遗传特征的宝贵工具.
研究的目的:
- 识别和绘制与大粒大小相关的定量特征位点 (QTLs).
- 为进一步对谷物特征进行遗传分析,构建新的CSSL.
主要方法:
- 使用分子标记器辅助选择来识别大粒度CSSL (Z403).
- 一个次要的F2种群被用于定量性质位点 (QTL) 绘制的粒度大小.
- 单段替代线路 (SSSL) 和双段替代线路 (DSSL) 建成.
主要成果:
- 在5号,6号,7号,9号和12号染色体上检测到六个谷粒大小的QTL.
- 四个SSSL和两个DSSL成功建造.
- 确定了10个新的QTL,其中4个与现有文献相比可能是新的.
结论:
- Z403的大粒表型由多个QTLs控制,包括qGWT5,qGWT7,qGWT9和qGWT12.
- 谷物重量受到谷物长度和宽度QTL的影响.
- QTLs之间的表皮性相互作用可能在增强粒径方面发挥作用.
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