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Hybrid speciation via inheritance of alternate alleles of parental isolating genes

Molecular Plant 2021年第2期14卷 208-222页

作者： Zefu Wang Yuanzhong Jiang Hao Bi Zhiqiang Lu Yazhen Ma Xiaoyue Yang Ningning Chen Bin Tian Bingbing Liu Xingxing Mao Tao Ma Stephen P.DiFazio Quanjun Hu Richard J.Abbott Jianquan Liu Key Laboratory for Bio-Resource and Eco-Environment of Ministry of Education College of Life Sciences&State Key Lab of Hydraulics&Mountain River EngineeringSichuan UniversityChengdu 610065China State Key Laboratory of Grassland Agro-Ecosystem Innovation Institute of Ecology and Life SciencesLanzhou UniversityLanzhou 730000China CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China Key Laboratory of Biodiversity Conservation in Southwest China State Forestry and Grassland AdministrationSouthwest Forestry UniversityKunming 650224China Institute of Loess Plateau Shanxi UniversityTaiyuan 030006China Department of Biology West Virginia UniversityMorgantownWV 25606USA School of Biology University of St AndrewsSt Andrews KY169THUK

It is increasingly realized that homoploid hybrid speciation(HHS),which involves no change in chromosome number,is an important mechanism of *** will likely increase in frequency as ecological and geographical barriers between species are continuing to be disrupted by human *** requires the establishment of reproductive isolation between a hybrid and its parents,but the underlying genes and genetic mechanisms remain largely *** this study,we reveal by integrated approaches that reproductive isolation originates in one homoploid hybrid plant species through the inheritance of altemate alleles at genes that determine parental premating *** parent species of this hybrid species are reproductively isolated by differences in flowering time and survivorship on soils containing high concentrations of *** found that the hybrid species inherits alleles of parental isolating major genes related to flowering time from one parent and alleles of major genes related to iron tolerance from the other *** this way,it became reproductively isolated from one parent by the difference in flowering time and from the other by habitat adaptation(iron tolerance).These findings and further modeling results suggest that HHS may occur relatively easily via the inheritance of alternate parental premating isolating genes and barriers.

关键词： hybrid speciation genetic mechanism reproductive isolation alternate alleles parental species

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