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Genetic diversity and offspring fitness in the red and white fruit color morphs of the wild strawberry Fragaria pentaphylla

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Journal of Plant Ecology 2020年第1期13卷 36-41页

作者： Lu-Xi Chen Su-Ting Xu Wei-Hang Ding Jun-Min Li Peter Alpert Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation Taizhou UniversityTaizhou 318000China School of Life Science Shanghai Normal UniversityShanghai 200234China Biology Department University of MassachusettsAmherstMA 01003USA

Aims fruit color polymorphisms are widespread in plants,but what maintains them is largely *** hypothesis is that some morphs are preferred by dispersers while others have higher pre-or postdispersal *** leads to the prediction that fruit color morphs will differ in pre-or postdispersal *** We compared genetic and clonal diversity,mating system,morphological traits that might be associated with resistance to freezing,and germination,survival and seed production of progeny of the red and white fruit morphs in a population of a diploid,wild strawberry,Fragaria pentaphylla,from south-central *** Findings The red morph was much more abundant than the white but did not show higher genetic diversity as measured by observed and effective numbers of alleles,Shannon information index,or expected or observed *** showed that most of the genetic variation in the population was within rather than between *** did not differ in mating system parameters,and no significant biparental inbreeding was found in either *** flow between two morphs was high(N_(m)=6.89).Seeds of the red morph germinated about 2 days earlier and had a 40%higher rate of germination than those of the white morph,but survival of seedlings and seed production by surviving offspring did not differ between *** whole postdispersal fitness of the red morph was about two times higher than that of the white *** morphs had hairier petioles but not more surface wax on ***,results showed partial evidence for difference in pre-and postdispersal fitness between fruit color morphs in *** in fitness independent of dispersal may thus partially account for fruit color polymorphism in all cases.

关键词： Fragaria pentaphylla fruit color polymorphism genetic diversity mating system south-central China

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