J Integr Plant Biol. ›› 2017, Vol. 59 ›› Issue (8): 526-530.DOI: 10.1111/jipb.12546

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Natural hybridization and reproductive isolation between two Primula species

Yanping Xie1,2, Xingfu Zhu1, Yongpeng Ma3, Jianli Zhao4, Li Li2 and Qingjun Li4*   

  1. 1Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
    2Graduate University of Chinese Academy of Sciences, Beijing 10049, China
    3Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
    4Laboratory of Ecology and Evolutionary Biology, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming 650091, China
  • Received:2017-03-28 Accepted:2017-04-17 Published:2017-04-21
  • About author:*Correspondences: E-mail: Qingjun Li (qingjun.li@ynu.edu.cn)


Natural hybridization frequently occurs in plants and can facilitate gene flow between species, possibly resulting in species refusion. However, various reproductive barriers block the formation of hybrids and maintain species integrity. Here, we conducted a field survey to examine natural hybridization and reproductive isolation (RI) between sympatric populations of Primula secundiflora and P. poissonii using ten nuclear simple sequence repeat (SSR) loci. Although introgressive hybridization occurred, species boundaries between P. secundiflora and P. poissonii were maintained through nearly complete reproductive isolation. These interfertile species provide an excellent model for studying the RI mechanisms and evolutionary forces that maintain species boundaries.

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