![]() ![]() The results indicate that, despite a slightly higher population differentiation in C. We inferred the population structure and demographic history of the two species, and tested the occurrence of signatures of local adaptation in these genes. ![]() ![]() ![]() impatiens from the Italian Alps (Trentino). In this study we surveyed patterns of molecular evolution and genetic variability in a set of 19 genes, including neutral and candidate genes involved in cold response, across 10 populations each of C. Previous genome-wide analyses revealed the occurrence of distinct selective pressures in the two species, with genes involved in cold response evolving particularly fast in C. Here we study the demographic history and the possible existence of local adaptation in two related species of Brassicaceae, Cardamine impatiens and Cardamine resedifolia, which occupy separate habitats along the elevation gradient. This is particularly relevant in plants, which are often characterized by limited dispersal ability and the need to respond to abiotic and biotic stress factors specific to the local environment. For example, local adaptation and population structure affect the evolutionary history of species living along environmental clines. Species evolution depends on numerous and distinct forces, including demography and natural selection. ![]()
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