Population history of European mountain pines Pinus mugo and Pinus uncinata revealed by mitochondrial DNA markers  

作　　者：Julia Zaborowska Bartosz tabiszak Witold Wachowiak 

机构地区：[1]Institute of Environmental Biology,Adam Mickiewicz University in Poznan,Uniwersytetu Poznanskiego 6,61-614 Poznan,Poland [2]Institute of Dendrology,Polish Academy of Sciences,Parkowa 5,62-035 Kornik,Poland

出　　处：《Journal of Systematics and Evolution》2020年第4期474-486,共13页植物分类学报（英文版）

基　　金：The authors acknowledge with thanks the financial support from the Polish National Science Centre(Grant No.UMO-2015/19/B/NZ9/00024);The authors also thank Krystyna Boratynska from the Institute of Dendrology,Polish Academy of Sciences,for providing plant material.

摘　　要：The dwarf mountain pine(Pinus mugo)and the Pyrenean pine(P. uncinata)constitute a pair of closely related coniferous taxa of poorly resolved evolutionary history and affinity,which inhabit numerous stands scattered over subalpine environments of European mountain ranges.The aim of the study was to investigate their phylogeography and mutual relationships,shedding new light on their taxonomy and the past of the alpine flora.Previous evolutionary reconstructions of the mountain pines relied mainly on bi-parentally or paternally inherited markers that quickly homogenize between populations,showing rather shallow and recent differentiation of gene pools.Therefore,to contrast these pictures,we analyzed diversity and differentiation within a large set of new mitochondrial loci,inherited in maternal line and distributed by seeds at short geographical distances.Samples of the taxa were taken from 27 natural populations representing their rangewide distributions-17 populations of P.mugo and 10 of P.uncinata.All markers appeared polymorphic,providing a total of 31 multilocus haplotypes.Two of the loci proved to be species-diagnostic and nearly fixed between analyzed samples.Distribution of mitotypes indicate that allopatric populations of the taxa constitute separate mitochondrial haplogroups,and the two mountain pines have independent evolutionary history.However,introgression of P.mugo mitotypes by P.uncinata specimens revealed in the species contact zone in Western Alps shows that their speciation is not fully completed.

关 键 词：INTROGRESSION mitochondrial DNA PHYLOGEOGRAPHY Pinus mugo Pinus uncinata subalpine taxa 

分 类 号：Q94[生物学—植物学]