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Título: Conservation implications of the mating system of the Pampa Hermosa landrace of peach palm analyzed with microsatellite markers
Autor: Picanço-Rodrigues, Doriane
Astolfi-Filho, Spártaco A.T.
Lemes, Maristerra R.
Gribel, Rogério
Magno Sebbenn, Alexandre
Clement, Charles Roland
Palavras-chave: Bactris Gasipaes
Controlled Study
Effective Population Size
Gene Locus
Genetic Conservation
Genetic Improvement
Genetic Variability
Mating System
Microsatellite Marker
Plant Breeding
Plant Genetics
Species Conservations
Bactris Gasipaes
Data do documento: 2015
Revista: Genetics and Molecular Biology
Encontra-se em: Volume 38, Número 1, Pags. 59-66
Abstract: 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. © 2015, Sociedade Brasileira de Genética. Printed in Brazil.
DOI: 10.1590/S1415-475738120140022
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