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Paternal inheritance in mealybugs (Hemiptera: Coccoidea: Pseudococcidae)
Hofit Kol-Maimon1, Zvi Mendel, José Carlos Franco
1Department of Entomology, The Volcani Center, ARO, 50250, Bet Dagan, Israel.
Die Naturwissenschaften
|August 6, 2014
Summary
Mealybug males can pass paternal genes to their sons across generations, even through hybrid offspring. This study confirms paternal inheritance in mealybugs via F1 males to F2 generations.
Area of Science:
- Entomology
- Genetics
- Reproductive Biology
Background:
- Mealybugs exhibit haplodiploidy with paternal genome elimination (PGE).
- Previous research suggested limited paternal gene transmission in mealybugs.
- Understanding paternal inheritance is crucial for insect reproductive biology.
Purpose of the Study:
- To demonstrate paternal inheritance from male mealybugs to F2 offspring through F1 male hybrids.
- To investigate the role of hybridization in mealybug inheritance patterns.
- To analyze the inheritance of pherotype and genotype in interspecific and intraspecific crosses.
Main Methods:
- Crossed two mealybug species (Planococcus ficus and P. citri) and two P. ficus populations.
- Monitored male pheromone attraction (pherotype) and ITS2 gene sequences (genotype) over three generations.
- Utilized F1 male hybrids to trace the paternal line to F2 offspring.
Main Results:
- Confirmed paternal inheritance in mealybugs from males to F2 offspring via F1 males.
- Demonstrated that F2 hybrid males expressed paternal pherotypes and genotypes, irrespective of maternal origin.
- Observed the absence of paternal traits in F2 hybrid females from interspecific crosses, indicating sex-specific inheritance patterns.
Conclusions:
- Paternal inheritance in mealybugs is possible through a paternal line involving F1 males.
- Hybridization between P. ficus and P. citri reveals complex and sex-specific inheritance mechanisms.
- Further research is needed to elucidate the role of unattracted males in interspecific interactions.
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