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鸭亲本间遗传距离与杂交后代杂种优势关系的研究

DOI: 10.3321/j.issn:1000-7091.2006.02.031, PP. 127-131

Keywords: 随机扩增多态DNA,杂交子一代,杂交子二代,杂交优势,遗传距离

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Abstract:

运用随机扩增多态DNA方法,对樱桃谷鸭、麻鸭及其杂交一代和用F1作为母本再与父本番鸭属间杂交培育的三元杂交半番鸭(F2)基因组DNA进行了遗传分析。结果表明,RAPD可用于有效标记鸭品种之间遗传亲缘关系和杂种优势预测;在所使用的20种随机引物中,个鸭种共产生760条带,其中多态性带68条,占总条带数的74.7%,说明鸭群体具有较为丰富的遗传多样性;杂交一代多态性位点比例为67.9%,遗传相似度为0.8227,三元杂交二代多态性位点比例为83.1%,遗传相似度为0.8264。说明三元杂交子二代的杂种优势可以用杂种优势理论中的显形假说来解释。

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