Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/3820
Título: Conservation implications of the mating system of the Pampa Hermosa landrace of peach palm analyzed with microsatellite markers
Autor(es): Doriane Picanço Rodrigues
Spartaco Astolfi Filho
Maristerra R Lemes
Gribel, Rogério
Alexandre M. Sebbenn
Charles Roland Clement
Assunto: Sistema de cruzamento
Genética de populações
Bactris gasipaes
ISSN: 1415-4757
Revista: Genetics and Molecular Biology
Volume: 38
Resumo: Peach palm (Bactris gasipaes) is cultivated by many indigenous and traditional communities from Amazonia to Central America for its edible fruits, and is currently important for its heart-of-palm. The objective of this study was to investigate the mating system of peach palm, as this is important for conservation and breeding. Eight microsatellite loci were used to genotype 24 open-pollinated progenies from three populations of the Pampa Hermosa landrace maintained in a progeny trial for genetic improvement. Both the multi-locus outcrossing rates (0.95 to 0.99) and the progeny level multi-locus outcrossing rates (0.9 to 1.0) were high, indicating that peach palm is predominantly allogamous. The outcrossing rates among relatives were significantly different from zero (0.101 to 0.202), providing evidence for considerable biparental inbreeding within populations, probably due to farmers planting seeds of a small number of open-pollinated progenies in the same plot. The correlations of paternity estimates were low (0.051 to 0.112), suggesting a large number of pollen sources (9 to 20) participating in pollination of individual fruit bunches. Effective population size estimates suggest that current germplasm collections are insufficient for long-term ex situ conservation. As with most underutilized crops, on farm conservation is the most important component of an integrated conservation strategy.
URI: http://repositorio.inpa.gov.br/handle/123/3820
ISSN: 1415-4757
DOI: https://dx.doi.org/10.1590/s1415-475738120140022
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