CONSERVATION GENETICS OF NEOTROPICAL POLLINATORS REVISITED: MICROSATELLITE ANALYSIS SUGGESTS THAT DIPLOID MALES ARE RARE IN ORCHID BEES

CONSERVATION GENETICS OF NEOTROPICAL POLLINATORS REVISITED: MICROSATELLITE ANALYSIS SUGGESTS THAT DIPLOID MALES ARE RARE IN ORCHID BEES

Allozyme analyses have suggested that Neotropical orchid bee (Euglossini) pollinators are vulnerable because of putative high frequencies of diploid males, a result of loss of sex allele diversity in small hymenopteran populations with single locus complementary sex determination. Our analysis of 10...

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Bibliographic Details
Published in:Evolution Vol. 64; no. 11; pp. 3318 - 3326
Main Authors: Souza, Rogério O., Del Lama, Marco A., Cervini, Marcelo, Mortari, Norma, Eltz, Thomas, Zimmermann, Yvonne, Bach, Carola, Brosi, Berry J., Suni, Sevan, Quezada-Euán, J. Javier G., Paxton, Robert J.
Format: Journal Article
Language:English
Published: Malden, USA Blackwell Publishing Inc 01-11-2010
Wiley Periodicals Inc
Oxford University Press
Subjects:
Alleles
Animal populations
Animals
Bees
Bees - genetics
Bees - physiology
BRIEF COMMUNICATIONS
Bumblebees
Complementary sex determination
csd
Diploidy
Euglossini
Evolution
Evolution, Molecular
Female
Gene loci
Genetic diversity
Genetic loci
Genetic Variation
Genetics, Population
Honey bees
Hymenoptera
Insect genetics
Insect pollination
Male
Male animals
Microsatellite Repeats
Models, Genetic
Models, Statistical
Orchidaceae
Plant reproduction
Pollination
Population genetics
Sex Factors
Species
Species Specificity
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Summary:Allozyme analyses have suggested that Neotropical orchid bee (Euglossini) pollinators are vulnerable because of putative high frequencies of diploid males, a result of loss of sex allele diversity in small hymenopteran populations with single locus complementary sex determination. Our analysis of 1010 males from 27 species of euglossine bees sampled across the Neotropics at 2-11 polymorphic microsatellite loci revealed only five diploid males at an overall frequency of 0.005 (95% CIs 0.002-0.010); errors through genetic nondetection of diploid males were likely small. In contrast to allozyme-based studies, we detected very weak or insignificant population genetic structure, even for a pair of populations > 500 km apart, possibly accounting for low diploid male frequencies. Technical flaws in previous allozyme-based analyses have probably led to considerable overestimation of diploid male production in orchid bees. Other factors may have a more immediate impact on population persistence than the genetic load imposed by diploid males on these important Neotropical pollinators.
Bibliography:ArticleID:EVO1052
istex:B3D2179A3EDB104C63C5662789A59CBCB2175139
ark:/67375/WNG-F3GMWXCG-W
Department of Entomology, Cornell University, Comstock Hall, Ithaca, New York 14853.
Institute for Biology, Martin‐Luther‐University Halle‐Wittenberg, Hoher Weg 8, D‐06099 Halle (Saale), Germany.
Present Address: Universidade Federal do Acre, Estrada do Canela Fina Km 12, Colônia São Francisco, Gleba Formoso Lote 245, Cruzeiro do Sul, CEP 69.980‐000, Acre Brazil.
Department of Environmental Studies, Emory University, Math & Science Center, Suite E510, 400 Dowman Drive, Atlanta, Georgia 3032.
ObjectType-Article-1
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ISSN:0014-3820
1558-5646
DOI:10.1111/j.1558-5646.2010.01052.x