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核农学报  2014 

小麦体细胞无性系变异及4-8抗条锈遗传分析

DOI: 10.11869/j.issn.100-8551.2014.10.1751, PP. 1751-1759

Keywords: 小麦,体细胞无性系,抗条锈病,遗传分析

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Abstract:

体细胞无性系变异可以用于植物品种改良及种质创制.本研究以陇春21号、宁春4号和花培9355三个不同基因型材料为供试材料,取其幼胚为外植体进行组织培养,继代愈伤组织培养6个月后进行分化培养获得了再生植株,在田间栽培条件下对这些无性系进行了农艺性状的鉴定筛选,从R5中筛选出了12份综合性状表现突出的材料.同时,为明确体细胞无性系4-8的抗条锈性的遗传基础,对试验材料进行了苗期和成株期接种鉴定及田间自然发病鉴定,结果表明小麦体细胞无性系4-8具有较好的抗条锈特性,尤其对当前甘肃省主要流行小种条中33号(CY33)表现免疫;且抗性遗传分析结果表明该品系对条中33号的抗性基因是由1对显性基因控制.这为利用体细胞无性系变异进行小麦抗锈新种质的创制和新品种选育提供了依据.

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