RT Journal Article
T1 Bee Trypanosomatids: First Steps in the Analysis of the Genetic Variation and Population Structure of Lotmaria passim, Crithidia bombi and Crithidia mellificae
A1 Bartolomé, Carolina
A1 Buendía Abad, María
A1 Ornosa Gallego, Concepción
A1 Rúa, Pilar De la
A1 Martín Hernández, Raquel
A1 Higes, Mariano
A1 Maside, Xulio
AB Trypanosomatids are among the most prevalent parasites in bees but, despite the fact that their impact on the colonies can be quite important and that their infectivity may potentially depend on their genotypes, little is known about the population diversity of these pathogens. Here we cloned and sequenced three non-repetitive single copy loci (DNA topoisomerase II, glyceraldehyde-3-phosphate dehydrogenase and RNA polymerase II large subunit, RPB1) to produce new genetic data from Crithidia bombi, C. mellificae and Lotmaria passim isolated from honeybees and bumblebees. These were analysed by applying population genetic tools in order to quantify and compare their variability within and between species, and to obtain information on their demography and population structure. The general pattern for the three species was that (1) they were subject to the action of purifying selection on nonsynonymous variants, (2) the levels of within species diversity were similar irrespective of the host, (3) there was evidence of recombination among haplotypes and (4) they showed no haplotype structuring according to the host. C. bombi exhibited the lowest levels of synonymous variation (πS= 0.06 ± 0.04 %) — and a mutation frequency distribution compatible with a population expansion after a bottleneck — that contrasted with the extensive polymorphism displayed by C. mellificae (πS= 2.24 ± 1.00 %), which likely has a more ancient origin. L. passim showed intermediate values (πS= 0.40 ± 0.28 %) and an excess of variants a low frequencies probably linked to the spread of this species to new geographical areas.
PB Springer Nature
SN 0095-3628
YR 2021
FD 2021-10-05
LK https://hdl.handle.net/20.500.14352/4945
UL https://hdl.handle.net/20.500.14352/4945
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
NO Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA) / European Regional Development Fund (ERDF)
NO Eva Crane Trust
NO Fundación Séneca / Agencia de Ciencia y Tecnología de la Región de Murcia
DS Docta Complutense
RD 18 abr 2025