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Development of Ty1-copia retrotransposon-based SSAP molecular markers for the study of genetic diversity in peach

文献类型： 外文期刊

作者： Jiao, Yun 1 ; Ma, Rui-juan 1 ; Shen, Zhi-jun 1 ; Yu, Ming-liang 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Hort, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Jiangsu, Peoples R China

关键词： SSAP;LTR;Peach;Ornamental peach;Genetic diversity

期刊名称：BIOCHEMICAL SYSTEMATICS AND ECOLOGY （ 影响因子：1.381； 五年影响因子：1.351 ）

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收录情况： SCI

摘要： Sequence-specific amplified polymorphism (SSAP) technology is a novel, anchored PCR approach derived from AFLP, which amplifies the region between a transposon insertion and an adjacent restriction site and have higher levels of polymorphism. In the current study, we developed 16 SSAP markers based on the long terminal repeat (LTR) sequences of Ty1-copia retrotransposons in the peach and used them for DNA profiling of 52 individual peaches: 44 peach cultivars and 8 ornamental peaches. These primer combinations produced a total of 1,553 fragments and 1,517 polymorphic bands with a polymorphism percentage of 97.7%. Furthermore, the Shannon's information index of each primer combination ranged from 0.1593 to 0.4456. Neighbor-joining analyses revealed two main genetic clusters, corresponding to the fruit flesh types: (A-1) MF (melting flesh) with clingstone and ornamental peaches; (A-2) MF with freestone and NMF (non-melting flesh) with clingstone. Finally, cluster analyses revealed that all ornamental peaches are closely related to the MF with clingstone peach cultivars. The application of these primer combinations identified using SSAP will facilitate future cultivar identification and germplasm management in peaches. (C) 2014 Elsevier Ltd. All rights reserved.

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