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Effect of Whole-Genome Duplication on the Evolutionary Rescue of Sterile Hybrid Monkeyflowers

Plant Communications 2020年第6期1卷 58-71页

作者： Sofie Meeus KristýnaSemberová Nico De Storme Danny Geelen Mario Vallejo-Marín Department of Biological and Environmental Sciences.University of Stirling Stirling FK94LAUK Department of Botany Charles University12843 Prague 2Czech Republic Department of Plants and Crops Ghent University9000 GhentBelgium Meise Botanic Garden Nieuwelaan 381860 MeiseBelgium Department of Biosystems KU LeuvenHeverlee 3001Belgium

Hybridization is a creative evolutionary force,increasing genomic diversity and facilitating adaptation and even *** often face significant challenges to establishment,including reduced fertility that arises from genomic incompatibilities between their ***-genome duplication in hybrids(allopolyploidy)can restore fertility,cause immediate phenotypic changes,and generate reproductive *** the survival of polyploid lineages is uncertain,and few studies have compared the performance of recently formed allopolyploids and their parents under field ***,we use natural and synthetically produced hybrid and polyploid monkeyflowers(Mimulus spp.)to study how polyploidy contributes to the fertility,reproductive isolation,phenotype,and performance of hybrids in the *** find that polyploidization restores fertility and that allopolyploids are reproductively isolated from their *** phenotype of allopolyploids displays the classic gigas effect of whole-genome duplication,in which plants have larger organs and are slower to *** experiments indicate that survival of synthetic hybrids before and after polyploidization is intermediate between that of the parents,whereas natural hybrids have higher survival than all other *** conclude that hybridization and polyploidy can act as sources of genomic novelty,but adaptive evolution is key in mediating the establishment of young allopolyploid lineages.

关键词： allopolyploid erythranthe Mimulus polyploidy speciation whole-genome duplication

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