INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
artículos
Título:
Phenological match drives pollen-mediated gene flow in a temporally dimorphic tree
Autor/es:
GONZÁLEZ-MARTÍNEZ, S. C.; AIZEN, M. A.; GLEISER, G.; CHYBICKI, I. J.
Revista:
PLANT BIOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2018 vol. 20 p. 93 - 100
ISSN:
1435-8603
Resumen:
? Variation in flowering phenology is common in natural populations, and is expectedto be, together with inter-mate distance, an important driver of effective pollen dispersal.In populations composed of plants with temporally separated sexual phases (i.e.dichogamous or heterodichogamous populations), pollen-mediated gene flow isassumed to reflect phenological overlap between complementary sexual phases. In thisstudy, we conducted paternity analyses to test this hypothesis in the temporally dimorphictree Acer opalus.? We performed spatially explicit analyses based on categorical and fractional paternityassignment, and included tree size, pair-wise genetic relatedness and morph type asadditional predictors. Because differences between morphs in flowering phenologymay also influence pollination distances, we modelled separate pollen dispersal kernelsfor the two morphs.? Extended phenological overlap between male and female phases (mainly associatedwith inter-morph crosses) resulted in higher siring success after accounting for theeffects of genetic relatedness, morph type and tree size, while reduced phenologicaloverlap (mainly associated with intra-morph crosses) resulted in longer pollinationdistances achieved. Siring success also increased in larger trees.? Mating patterns could not be predicted by phenology alone. However, as heterogeneityin flowering phenology was the single morph-specific predictor of siring success, itis expected to be key in maintaining the temporal dimorphism in A. opalus, by promotingnot only a prevalent pattern of inter-morph mating, but also long-distancepollination resulting from intra-morph mating events.