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萝卜雄性不育细胞质的鉴定与分类

DOI: 10.7668/hbnxb.2014.05.021, PP. 125-129

Keywords: 萝卜,细胞质雄性不育系,分类

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Abstract:

通过对不同萝卜雄性不育细胞质进行鉴定与分类,确定不育细胞质的类型,为更好地利用这些不育细胞质提供科学依据。利用5个来源不同的萝卜细胞质雄性不育材料和8个可育的白萝卜品种,从恢保关系、花粉败育方式及线粒体DNA的分子标记等3个方面对其进行了研究。结果发现,根据5个细胞质雄性不育的恢保关系,可将其分为2种细胞质类型。进一步对其花器官形态及花粉败育方式研究发现,类型1花丝短缩,花药瘦小,败育从四分体时期开始,表现为绒毡层细胞液泡化,最终药室的基本结构消失,内无花粉粒;类型2花药大小与可育相似,雄蕊稍低于柱头,败育从单核小孢子时期开始,能够保持药室的基本结构,药室内存在没有活力的花粉粒外壳。PCR检测结果表明:类型1为Ogura不育细胞质类型,类型2为NWB不育细胞质类型。

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