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棉花学报  2015 

转MvNHX1和MvP5CS基因棉花耐盐抗旱性比较与育种价值分析

DOI: 10.11963/issn.1002-7807.201503002, PP. 198-207

Keywords: MvNHX1,MvP5CS,转基因棉花,耐盐,抗旱,育种价值分析

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Abstract:

通过对花粉管通道法获得的T7转MvNHX1基因的10个棉花株系和转MvP5CS基因的3个棉花株系与对照非转基因棉花D5在温室内盐和干旱胁迫下的发芽率、生理生化指标以及田间花期干旱胁迫下农艺性状和纤维品质进行分析发现温室内盐和干旱胁迫后,转基因棉花叶片叶绿素含量、脯氨酸含量均高于对照,而丙二醛含量低于对照;田间花期干旱胁迫下,2种转基因植株果枝数、有效果枝数、铃数、有效铃数、铃重、子棉、皮棉、衣分、子指和衣指均高于对照,说明转MvNHX1基因和转MvP5CS基因植株在干旱逆境下的产量高于非转基因;经花期干旱胁迫后,2种转基因棉花的纤维断裂伸长率、短纤维率、马克隆值和纺纱一致性指数优于非转基因棉花D5。综合分析表明2种转基因棉花的耐盐抗旱性均有提高,其中转MvNHX1基因棉花的耐盐性优于转MvP5CS基因棉花植株,而转MvP5CS基因棉花植株的抗旱性优于转MvNHX1基因棉花植株。

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