Journal ArticleDOI
Heterozygote excess in a self-incompatible and partially clonal forest tree species -- Prunus avium L.
Solenn Stoeckel,Jérôme Grange,Juan F. Fernández-Manjarrés,Isabelle Bilger,Nathalie Frascaria-Lacoste,Stéphanie Mariette,Stéphanie Mariette +6 more
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TLDR
The results revealed that clonality probably explains significant negative FIS in wild cherry populations when considering all individuals, and more theoretical effort is needed to develop expectations and hypotheses, and test them in the case of species combining self‐incompatibility and partially asexual reproduction.Abstract:
Wild cherry (Prunus avium L.), a partially asexual self-incompatible forest tree, shows heterozygote excess, which is a poorly studied phenomenon. In three natural populations, we found significant heterozygote excess at almost all investigated loci (eight microsatellites and markers for the self-incompatibility locus). We examined four hypotheses to account for this observed heterozygote excess. First, negative F(IS) can result from a lack of selfed progeny in small populations of outcrossing species. A second explanation for negative F(IS) is selection during the life cycle of the most heterozygous individuals. A third explanation is negative assortative mating when reproduction occurs between individuals bearing phenotypes more dissimilar than by chance. The last explanation for negative F(IS) relies on asexual reproduction. Expectations for each hypothesis were tested using empirical data. Patterns of F(IS) differed among loci. Nevertheless, our experimental results did not confirm the small sample size hypothesis. Although one locus is probably under a hitch-hiking effect from the SI locus, we rejected the effect of the self-incompatibility locus for the genome as a whole. Similarly, although one locus showed a clear pattern consistent with the selection of heterozygous individuals, the heterosis effect over the whole genome was rejected. Finally, our results revealed that clonality probably explains significant negative F(IS) in wild cherry populations when considering all individuals. More theoretical effort is needed to develop expectations and hypotheses, and test them in the case of species combining self-incompatibility and partially asexual reproduction.read more
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Journal ArticleDOI
The evolutionary ecology of clonally propagated domesticated plants.
TL;DR: It is argued that widespread notions about their evolution under domestication are oversimplified, and that clonal propagated crops offer rich material for evolutionary studies, and how their mixed clonal/sexual reproductive systems function is explored.
Journal ArticleDOI
Vicariance patterns in the Mediterranean Sea: East-west cleavage and low dispersal in the endemic seagrass Posidonia oceanica
Sophie Arnaud-Haond,Marianna Migliaccio,Elena Díaz-Almela,Sara Teixeira,Mirjiam Susanne Van De Vliet,Filipe Alberto,Gabriele Procaccini,Carlos M. Duarte,Ester A. Serrão +8 more
TL;DR: This work investigated the biogeography and dispersal of P. oceanica at various spatial scales in order to assess the influence of different evolutionary factors shaping the distribution of genetic diversity in this species.
Journal ArticleDOI
Population structure and genetic bottleneck in sweet cherry estimated with SSRs and the gametophytic self-incompatibility locus.
Stéphanie Mariette,Muriel Tavaud,Uraiwan Arunyawat,Uraiwan Arunyawat,Gaëlle Capdeville,Muriel Millan,Franck Salin +6 more
TL;DR: This study provides insights into domestication events of cherry, however, requires confirmation on a larger sampling scheme for both sweet cherry landraces and wild cherry.
Journal ArticleDOI
Construction of an intra-specific sweet cherry (Prunus avium L.) genetic linkage map and synteny analysis with the Prunus reference map
James W. Olmstead,James W. Olmstead,Audrey Sebolt,Antonio Cabrera,Suneth S. Sooriyapathirana,Sue A. Hammar,Gloria Iriarte,Dechun Wang,Charles Chen,Charles Chen,Esther van der Knaap,Amy Iezzoni +11 more
TL;DR: Linkage maps of the sweet cherry cultivar ‘Emperor Francis’ and the wild forest cherry ‘New York 54’ were constructed using primarily simple sequence repeat (SSR) markers and gene-derived markers with known positions on the Prunus reference map suggesting that the cherry genome is colinear with that of the other diploid PrunUS species.
Journal ArticleDOI
Genetic diversity in adult and seedling populations of Primula vulgaris in a fragmented agricultural landscape
TL;DR: Investigation of genetic variation and structure in adult and seedling Primula vulgaris shows a significant loss of observed heterozygosity, a trend for higher inbreeding levels (FIS), and higher differentiation (FST) between populations compared to the adult generation.
References
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