In this section
@article{Hughes:2007:10.3732/ajb.94.10.1688,
author = {Hughes, M and Möller, M and Edwards, TJ and Bellstedt, DU and de, Villiers M},
doi = {10.3732/ajb.94.10.1688},
journal = {American Journal of Botany},
pages = {1688--1695},
title = {The impact of pollination syndrome and habitat on gene flow: a comparative study of two <i>Streptocarpus</i> (Gesneriaceae) species},
url = {http://dx.doi.org/10.3732/ajb.94.10.1688},
volume = {94},
year = {2007}
}
TY - JOUR
AB - <jats:p>Gene flow through pollen and seed dispersal is important in terms of population differentiation and eventually speciation. Seed and pollen flow are affected in turn by habitats and pollen vectors. We examined the effect of different pollinators and habitats on gene flow by comparing two species of <jats:italic>Streptocarpus</jats:italic>, using microsatellite and chloroplast RFLP markers. Populations of the forestdwelling <jats:italic>S. primulifolius</jats:italic> were highly differentiated according to nuclear microsatellite data and had mutually exclusive chloroplast haplotypes. This result is congruent with infrequent seed dispersal and limited betweenpopulation foraging by the longtongued fly pollinator <jats:italic>Stenobasipteron wiedemanni</jats:italic>. In contrast, populations of <jats:italic>S. dunnii</jats:italic> growing in exposed crags had lower levels of population differentiation according to both nuclear and chloroplast data, congruent with a hypothesis of more effective between population seed dispersal and greater pollenmediated gene flow due to the sunbird pollinator <jats:italic>Nectarinia famosa</jats:italic>. The population genetic behavior of these species is reflected in their taxonomy and phylogenetic position; <jats:italic>S. primulifolius</jats:italic> belongs to a taxonomically complex clade in which recent speciation is evident, while the clade containing <jats:italic>S. dunnii</jats:italic> is characterized by taxonomically welldefined species on longer phylogenetic branches. Our study shows that pollinator movements and seed dispersal patterns are a major determinant of the evolutionary trajectories of these species.</jats:p>
AU - Hughes,M
AU - Möller,M
AU - Edwards,TJ
AU - Bellstedt,DU
AU - de,Villiers M
DO - 10.3732/ajb.94.10.1688
EP - 1695
PY - 2007///
SN - 0002-9122
SP - 1688
TI - The impact of pollination syndrome and habitat on gene flow: a comparative study of two <i>Streptocarpus</i> (Gesneriaceae) species
T2 - American Journal of Botany
UR - http://dx.doi.org/10.3732/ajb.94.10.1688
UR - https://doi.org/10.3732/ajb.94.10.1688
VL - 94
ER -
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