Clonal diversity and fine-scale genetic structure in a high andean treeline population

0444498 - BC 2016 RIV US eng J - Článek v odborném periodiku
Peng, Y. - Macek, P. - Macková, Jana - Romoleroux, K. - Hensen, I.
Clonal diversity and fine-scale genetic structure in a high andean treeline population.
Biotropica. Roč. 47, č. 1 (2015), s. 59-65. ISSN 0006-3606. E-ISSN 1744-7429
Grant ostatní: GA AV ČR(CZ) IAA601110702; GA MŠk(CZ) LM2010009
Program: IA
Institucionální podpora: RVO:60077344
Klíčová slova: AFLP * clonal diversity * clonal propagation * fine-scale genetic structure * Polylepis reticulata * treeline
Kód oboru RIV: EB - Genetika a molekulární biologie
Impakt faktor: 1.944, rok: 2015

Clonal propagation becomes more abundant with increasing altitudes as environmental conditions worsen. To date, little attention has been paid to the way in which clonal propagation affects genetic diversity and the fine-scale spatial genetic structure (FSGS) of clonal alpine trees. An AFLP study was undertaken to quantify the clonal and genetic diversity and FSGS of the vulnerable treeline species Polylepis reticulata in Ecuador. We successfully genotyped 32 and 75 ramets within 4mx100m (coarse scale) and 4mx4m (fine scale) transects of one population, respectively. Higher genotypic diversity was detected at the coarse scale than at the fine scale, while lower genetic diversity was detected for P.reticulata than other Polylepis spp. at both scales. Significantly stronger FSGS was detected at the ramet level than the genet level for P.reticulata within a spatial distance of 3m. The studied P.reticulata population showed pronounced FSGS (Sp=0.012 at the genet level, a statistic reflecting declining pairwise kinship with distance) revealed restricted gene dispersal, which implies restricted seed dispersal for this population, assuming pollen flow is as extensive as that described for other wind-pollinated tree species. Our results revealed that clonal diversity is a function of both sample size and the spatial scale of the sampling area. The findings highlights that clonal propagation has affected FSGS within a spatial distance of 3m for this species.
Trvalý link: http://hdl.handle.net/11104/0249921