Silencing of the DNA methyltransferase 1 associated protein 1 (DMAP1) gene in the invasive ladybird Harmonia axyridis implies a role of the DNA methyltransferase 1-DMAP1 complex in female fecundity.
Insect Mol Biol
; 29(2): 148-159, 2020 04.
Article
en En
| MEDLINE
| ID: mdl-31531894
The invasive harlequin ladybird Harmonia axyridis is a textbook example of polymorphism and polyphenism as the temperature during egg development determines the frequency of melanic morphs and the number and size of black spots in nonmelanic morphs. Recent concepts in evolutionary biology suggest that epigenetic mechanisms can translate environmental stimuli into heritable phenotypic changes. To investigate whether epigenetic mechanisms influence the penetrance and expressivity of colour morphs in H. axyridis, we used RNA interference to silence key enzymes required for DNA methylation and histone modification. We found that neither of these epigenetic mechanisms affected the frequency of different morphs, but there was a significant impact on life-history traits such as longevity and fecundity. Strikingly, we found that silencing the gene encoding for DNA methyltransferase 1 associated protein 1 (DMAP1) severely reduced female fecundity, which correlated with an abundance of degenerated ovaries in DMAP1-knockdown female beetles. Finally, we observed significant differences in DMAP1 expression when we compared native and invasive H. axyridis populations with a biocontrol strain differing in egg-laying capacity, suggesting that the DNA methyltransferase 1-DMAP1 complex may influence the invasive performance of this ladybird.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Escarabajos
/
Proteínas de Insectos
/
Interferencia de ARN
/
Metiltransferasas
Tipo de estudio:
Risk_factors_studies
Límite:
Animals
Idioma:
En
Revista:
Insect Mol Biol
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2020
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Reino Unido