Genetic Diversity inNannotrigona testaceicornis(Hymenoptera: Apidae) Aggregations in Southeastern Brazil

Abstract

The Meliponini, also known as stingless bees, are distributed in tropical and subtropical areas of the world and plays an essential role in pollinating many wild plants and crops These bees can build nests in cavities of trees or walls, underground or in associations with ants or termites; interestingly, these nests are sometimes found in aggregations. In order to assess the genetic diversity and structure in aggregates of Nannotrigona testaceicornis (Lepeletier), samples of this species were collected from six aggregations and genetically analyzed for eight specific microsatellite loci. We observed in this analysis that the mean genetic diversity value among aggregations was 0.354, and the mean expected and observed heterozygosity values was 0.414 and 0.283, respectively. The statistically significant Fis value indicated an observed heterozygosity lower than the expected heterozygosity in all loci studied resulting in high homozygosis level in these populations. In addition, the low number of private alleles observed reinforces the absence of structuring that is seen in the aggregates. These results can provide relevant information about genetic diversity in aggregations of N. testaceicornis and contribute to the management and conservation of these bees’ species that are critical for the pollination process.

Las abejas sin aguijón (Tribu Meliponini) en los agroecosistemas de América Latina

“…Del mismo modo, se deben mantener sitios aptos para el anidamiento de estas abejas cerca de los cultivos, de manera que puedan desplazarse para polinizar estos. Es importante tomar en cuenta el impacto que tienen los cultivos en las poblaciones de abejas en cuanto a su acervo genético, ya que muchas veces los nidos quedan muy separados de otros y las nuevas colmenas muestran menor diversidad genética entre ellas (Fonseca et al, 2017). Debido a que la mayoría de nuevas colmenas dependen de la migración de un enjambre y material proveniente de una colmena madre, el aislamiento o traslado de nidos a zonas lejanas conlleva a un alto incremento en la endogamia (Vollet-Neto et al, 2018).…”