Tracking paternal genes with DALP markers in a pseudoarrhenotokous reproductive system: biparental transmission but haplodiploid-like inheritance in the mite Neoseiulus californicus

Article Abstract:

Paternal genes have been tracked using direct amplification of length polymorphism (DALP) markers in a pseudoarrhenotokous reproductive system. In the mite Neoseiulus californicus.biparental transmission was found, but haplodiploid-like inheritance was also found. Codominant genetic markers were used. Selective elimination of the paternal genome in male tissues was indicated strongly.

Physiological aspects, Sex (Biology), Haploidy, Diploidy, Mites, Arthropoda, Arthropods

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Meiotic and mitotic instability of two EMS-produced centric fragments in the haplodiploid wasp Nasonia vitripennis

Article Abstract:

Meiotic and mitotic instability of two ethyl methanesulfonate (EMS)-produced centric fragments has been studied in the wasp Nasonia vitripennis, which is haplodiploid. Deletions or rearrangements associated with the peach-233 mutant interfere with appropriate pairing and segregation of CF2.

United States, Reports, Mitosis, Wasps, Genetic research, Mutagens

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The evolution of dominance

Article Abstract:

The history of thought on the evolution of dominance is reviewed with the assertion that support exists for the belief that dominance relationships have been shaped to some degree by natural selection. Metabolic pathways are products of evolutionary processes, possibly having been made more stable to perturbations thereby, and empirical experiments and theoretical models indicate substantial selection for dominance modifiers in spread of adaptive alleles or when a polymorphism is kept up by overdominant selection or migration-selection balance.

United Kingdom, Gene mutations, Gene mutation, Metabolic regulation

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