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Primitive Genepools of Asian Pears and Their Complex Hybrid Origins Inferred from Fluorescent Sequence-Specific Amplification Polymorphism (SSAP) Markers Based on LTR Retrotransposons

文献类型： 外文期刊

作者： Jiang, Shuang 1 ; Zheng, Xiaoyan 3 ; Yu, Peiyuan 1 ; Yue, Xiaoyan 1 ; Ahmed, Maqsood 4 ; Cai, Danying 5 ; Teng, Yuanwe 1 ;

作者机构： 1.Zhejiang Univ, Dept Hort, State Agr Minist Key Lab Hort Plant Growth Dev &, Hangzhou 310058, Zhejiang, Peoples R China

2.Shanghai Acad Agr Sci, Forest & Fruit Tree Inst, Shanghai 201403, Peoples R China

3.Lishui Univ, Inst Hort & Landscape, Coll Ecol, Lishui 323000, Zhejiang, Peoples R China

4.MUST, Dept Biotechnol, Main Allama Iqbal Rd, Mirpur 10250, Azad Kashmir, Pakistan

5.Zhejiang Acad Agr Sci, Inst Hort, Hangzhou, Zhejiang, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2016 年 11 卷 2 期

页码：

收录情况： SCI

摘要： Recent evidence indicated that interspecific hybridization was the major mode of evolution in Pyrus. The genetic relationships and origins of the Asian pear are still unclear because of frequent hybrid events, fast radial evolution, and lack of informative data. Here, we developed fluorescent sequence-specific amplification polymorphism (SSAP) markers with lots of informative sites and high polymorphism to analyze the population structure among 93 pear accessions, including nearly all species native to Asia. Results of a population structure analysis indicated that nearly all Asian pear species experienced hybridization, and originated from five primitive genepools. Four genepools corresponded to four primary Asian species: P. betulaefolia, P. pashia, P. pyrifolia, and P. ussuriensis. However, cultivars of P. ussuriensis were not monophyletic and introgression occurred from P. pyrifolia. The specific genepool detected in putative hybrids between occidental and oriental pears might be from occidental pears. The remaining species, including P. calleryana, P. xerophila, P. sinkiangensis, P. phaeocarpa, P. hondoensis, and P. hopeiensis in Asia, were inferred to be of hybrid origins and their possible genepools were identified. This study will be of great help for understanding the origin and evolution of Asian pears.

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