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利用SSR标记划分爆裂玉米杂种优势群的研究

DOI: 10.3321/j.issn:1000-7091.2004.03.004, PP. 13-17

Keywords: 爆裂玉米,SSR标记,遗传距离,聚类分析,杂种优势群

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Abstract:

利用113对SSR多态性引物研究了来源比较广泛的6个爆裂玉米自交系的遗传多样性,并初步进行了杂种优势群划分.结果表明:供试自交系间存在较丰富的SSR多态性;6个爆裂玉米自交系可划分为6个杂种优势群,其中Ⅰ,Ⅴ,Ⅵ类群以国内种质选系为主,Ⅱ,Ⅲ,Ⅳ类群主要为外引杂交种选系,第Ⅰ类群又可分为3个亚群.该分群结果与杂交组合的组配效果相吻合,高优势组合的亲本均属于不同的优势类群(亚群),而在类群(亚群)内未组配出优良组合.SSR标记可以用于研究爆裂玉米自交系的种质基础.

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