2019

Journal of Biogeography

Rocznik: 2019 | Tom: 46 | Numer: 2

artykuł naukowy

angielski

EN To assess the origin and genetic relationship of the northernmost populationofRhododendron ferrugineumin the Karkonosze Mts. (the Sudetes), located 350 kmnorth of the previously acknowledged species limit, in the context of the whole spe-cies range; to discuss, based on this case study, the glacial history of the CentralEuropean mountain flora and importance of rare, relict populations for biogeographi-cal inference and diversity conservation.Location:European mountains: Sudetes, Alps, Pyrenees.Methods:We sampled 90 individuals from 26R. ferrugineumpopulations spanningthe whole species’range. To infer genetic structure, diversity and relationshipsamong populations and isolated parts of the geographical range, we applied gen-ome‐wide amplified fragment length polymorphism (AFLP) genotyping and sequenc-ing of four cpDNA fragments and nrDNA ITS region.Results:Our AFLP analysis revealed four distinct genetic groups inR. ferrugineum,one formed by the northernmost population from (a) the Karkonosze Mts. (theSudetes) and the other three comprising populations from the (b) Western Alps andPyrenees, (c) South‐Westernmost Alps and (d) Eastern Alps. Genetic isolation of theKarkonosze population was further corroborated by a repetitive pattern differentia-tion in plastid DNA sequences, otherwise almost monomorphic across the range.Population from the Karkonosze was most closely related to those from the Wes-tern Alps and not from the geographically closest Eastern Alps.Main conclusions:We show that the population ofR. ferrugineumin the KarkonoszeMts. is a glacial relict and not a recently established or introduced population. Itsdistinctiveness and high genetic diversity show that it represents a northern, previ-ously undetected, genetic lineage of the species in Europe, which persisted throughclimatic changes in a small but stable microrefugium. Our case study highlights theimportance of an adequate coverage of a species’range in phylogeographical studiesand the significance of peripheral parts of the range to reveal biogeographical his-tory of lineages. It also supports the Karkonosze Mountains as an important refu-gium for the Central European mountain flora.

392 - 404

10.1111/jbi.13512

http://dx.doi.org/10.1111/jbi.13512

CC BY (uznanie autorstwa)

otwarte czasopismo

ostateczna wersja opublikowana

18.12.2018

w momencie opublikowania

140

140