Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/16380
Title: To self, or not to self... A review of outcrossing and pollen-mediated gene flow in neotropical trees
Authors: Ward, Megan
Dick, Christopher W.
Gribel, Rogério
Lowe, Andrew J.
Keywords: Autogamy
Gene Flow
Neotropical Region
Outcrossing
Pollination
Reproductive Strategy
Tree
Genetic Marker
Genetics
Geography
Phylogeny
Physiology
Pollen
Population Density
Genetics, Population
Reproduction
Short Survey
South America
Species Difference
Tree
Tropic Climate
Genetic Markers
Genetics, Population
Geography
Phylogeny
Pollen
Population Density
Reproduction
South America
Species Specificity
Trees
Tropical Climate
Animalsia
Hexapoda
Insecta
Issue Date: 2005
metadata.dc.publisher.journal: Heredity
metadata.dc.relation.ispartof: Volume 95, Número 4, Pags. 246-254
Abstract: Despite the typically low population densities and animal-mediated pollination of tropical forest trees, outcrossing and long-distance pollen dispersal are the norm. We reviewed the genetic literature on mating systems and pollen dispersal for neotropical trees to identify the ecological and phylogenetic correlates. The 36 studies surveyed found >90% outcrossed mating for 45 hermaphroditic or monoecious species. Self-fertilization rates varied inversely with population density and showed phylogenetic and geographic trends. The few direct measures of pollen flow (N=11 studies) suggest that pollen dispersal is widespread among low-density tropical trees, ranging from a mean of 200 m to over 19 km for species pollinated by small insects or bats. Future research needs to examine (1) the effect of inbreeding depression on observed outcrossing rates, (2) pollen dispersal in a wide range of pollination syndromes and ecological classes, (3) and the range of variation of mating system expression at different hierarchical levels, including individual, seasonal, population, ecological, landscape and range wide. © 2005 Nature Publishing Group All rights reserved.
metadata.dc.identifier.doi: 10.1038/sj.hdy.6800712
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