Botanical Journal of the Linnean Society, Volume 186, Issue 2, 25 January 2018, Pages 247–258, https://doi.org/10.1093/botlinnean/box094
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https://academic.oup.com/botlinnean/article-abstract/186/2/247/4825229?redirectedFrom=fulltext
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Abstract
We investigated the structure of genetic diversity in populations of Passiflora contracta across the range of the species in the Brazilian Atlantic Rainforest to understand better the impact of forest fragmentation on genetic structure. One hundred and ninety-eight samples were taken at 11 sites and genotyped using seven microsatellite loci. Complementary methods including F-statistics, analyses of molecular variance and clustering analyses were used to assess genetic diversity and population structure. Most of the genetic diversity was partitioned within populations, and c. 28% was due to differences among populations. The mean expected and observed heterozygosities were 0.65 and 0.48, respectively, with an FIS of 0.27, suggesting high levels of inbreeding. Samples were sorted into two Bayesian groups, which were not associated with geographical distribution. Admixture levels varied between populations, but estimated migration levels were low, with less than one individual per generation migrating among populations. The mean genetic diversity of P. contracta was 0.66. Combined with previous studies, our results provide evidence that populations of P. contracta evolved under geographical, but not genetic, isolation. This pattern of genetic diversity is shared with other phylogenetically unrelated taxa associated with the Atlantic Forest that have similar life history traits and ecological attributes.
For further details log on website :
https://academic.oup.com/botlinnean/article-abstract/186/2/247/4825229?redirectedFrom=fulltext
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