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11个中国杏品种S-RNase基因的检测与序列分析

DOI: 10.7685/j.issn.1000-2030.2008.04.007, PP. 37-42

Keywords: ,自交不亲和性,S-RNase,等位PCR扩增,基因型

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Abstract:

以11个未知基因型的中国杏品种为试材,根据李属植物S-RNase基因保守区设计2对引物组合检测各品种S-RNase基因,共获得22条等位扩增片段,电泳检测表明所有品种的扩增条带集中在300~1100bp的范围内,且表现出一定的长度多态性。序列分析进一步确定22个S-RNase基因为10个不同的等位基因,其中6个为首次发现,根据Gen-Bank中已登陆的杏S-RNase基因的顺序,分别命名为S19、S20、S23、S24、S25、S26,序列登陆号为EF185300、EF185301、EU037262、EU037263、EU037264、EU037265。推导氨基酸序列的同源分析表明,杏的S-RNase与李属植物的S-RNase表现较高的同源性,为59.3%~100%;与苹果和梨的S-RNase同源性较低,为19.6%~31.6%。试验确定11个中国杏品种资源的自交不亲和基因型分别为‘大果杏’S19/S20,‘张公园’S24/S25,‘二红’S9/S11,‘黄口外’S11/S26,‘植丸子’S11/S17,‘宇宙红’、‘大丰’S17/S23,‘超仁’、‘虹桥’S8/S11,‘冀光’、‘中华大杏梅’S8/S9;部分品种的田间杂交授粉座果与花粉管荧光显微镜观察证实了所鉴定基因型的可靠性。

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