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Population structuring of the ubiquitous stingless bee Tetragonisca angustula in southern Brazil as revealed by microsatellite and mitochondrial markers

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Autor(es):
Francisco, Flavio O. ; Santiago, Leandro R. ; Mizusawa, Yuri M. ; Oldroyd, Benjamin P. ; Arias, Maria C.
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: Insect Science; v. 24, n. 5, p. 877-890, OCT 2017.
Citações Web of Science: 0
Resumo

Tetragonisca angustula is one of the most widespread stingless bees in the Neotropics. This species swarms frequently and is extremely successful in urban environments. In addition, it is one of the most popular stingless bee species for beekeeping in Latin America, so nest transportation and trading is common. Nest transportation can change the genetic structure of the host population, reducing inbreeding and increasing homogenization. Here, we evaluate the genetic structure of 17 geographic populations of T. angustula in southern Brazil to quantify the level of genetic differentiation between populations. Analyses were conducted on partially sequenced mitochondrial genes and 11 microsatellite loci of 1002 workers from 457 sites distributed on the mainland and on 3 islands. Our results show that T. angustula populations are highly differentiated as demonstrated by mitochondrial DNA (mtDNA) and microsatellite markers. Of 73 haplotypes, 67 were population-specific. MtDNA diversity was low in 9 populations but microsatellite diversity was moderate to high in all populations. Microsatellite data suggest 10 genetic clusters and low level of gene flow throughout the studied area. However, physical barriers, such as rivers and mountain ranges, or the presence or absence of forest appear to be unrelated to population clusters. Factors such as low dispersal, different ecological conditions, and isolation by distance are most likely shaping the population structure of this species. Thus far, nest transportation has not influenced the general population structure in the studied area. However, due to the genetic structure we found, we recommend that nest transportation should only occur within and between populations that are genetically similar. (AU)

Processo FAPESP: 04/15801-0 - Biodiversidade e uso sustentável de polinizadores, com ênfase em abelhas Meliponini
Beneficiário:Vera Lucia Imperatriz-Fonseca
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 08/07417-6 - Capacitação técnica em coleta de abelhas e análises moleculares
Beneficiário:Leandro Rodrigues Santiago
Linha de fomento: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
Processo FAPESP: 10/18716-4 - Capacitação técnica em coleta de abelhas e análises moleculares
Beneficiário:Yuri Masakazu Mizusawa
Linha de fomento: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
Processo FAPESP: 10/50597-5 - Estudos populacionais e evolutivos em abelhas
Beneficiário:Maria Cristina Arias
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 08/08546-4 - Estrutura genética de populações insulares e continentais de abelhas da Mata Atlântica
Beneficiário:Flávio de Oliveira Francisco
Linha de fomento: Bolsas no Brasil - Doutorado