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大豆科学  2007 

大豆磷效率QTL定位及互作分析

DOI: 10.3969/j.issn.1000-9841.2007.04.003, PP. 460-466

Keywords: 大豆,磷效率,重组自交系,数量性状位点

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Abstract:

磷效率是复杂的数量性状,有一系列基因参与其中。利用科丰1号×南农1138-2衍生的重组自交系群体NJRIKY,对影响大豆磷效率的加性和上位性QTL同时进行定位,比较在两种磷条件下的大豆磷效率QTL的表达差异。采用5个指标评估大豆的磷效率,包括:茎干重、根干重、根冠比、磷利用效率和磷吸收效率。结果表明:在高磷和低磷条件下在8个连锁群上分别检测到3个和12个加性的QTL,可解释4.0%~13.8%的表型变异;另外,在高磷和低磷条件下,分别检测到12对和7对互作的QTL,可解释3.3%~19.9%的表型变异。本研究的QTL定位结果为进一步了解大豆在不同磷条件下的磷效率遗传机制提供了重要的线索。

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