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Immune pathways and defence mechanisms in honey bees Apis mellifera
It is suggested that an implied reduction in immune flexibility in bees reflects either the strength of social barriers to disease, or a tendency for bees to be attacked by a limited set of highly coevolved pathogens.
Phylogenetic evidence for a single, ancestral origin of a ‘true’ worker caste in termites
A test for correlated evolution which takes phylogenetic structure into account indicates that this pattern is of biological significance and suggests that the variable occurrence of a worker caste in termites has ecological determinants, apparently linked to differences in feeding and nesting habits.
Insights into social insects from the genome of the honeybee Apis mellifera
The genome sequence of the honeybee Apis mellifera is reported, suggesting a novel African origin for the species A. melliferA and insights into whether Africanized bees spread throughout the New World via hybridization or displacement.
Phylogenetic analysis and trait evolution in Australian lineages of drywood termites (Isoptera, Kalotermitidae).
- G. Thompson, L. Miller, M. Lenz, R. Crozier
- BiologyMolecular phylogenetics and evolution
- 1 December 2000
The association between habitat and defensibility supports the hypothesis that these two characters have been tightly linked throughout the social diversification of termites and the monophyly of all genera is supported.
Isolation and characterization of a termite transferrin gene up‐regulated on infection
No widespread evidence for pathogen‐mediated positive selection was detected at this locus, unlike certain vertebrate transferrin lineages, and codon‐based tests for selection among known insect transferrins revealed only a small proportion of cod on‐sites positively selected.
Population genetic structure of the Neotropical termite Nasutitermes nigriceps (Isoptera: Termitidae)
The majority of the 136 nests examined from three study sites showed patterns of protein polymorphism consistent with their origin from a single mated pair, establishing that monogamy is indeed the predominant mode of reproduction in Nasutitermes nigriceps.
Genome‐wide analysis of genes related to ovary activation in worker honey bees
The differential expression of vitellogenin and a putative AdoHycase suggests that the screen has captured core reproductive genes and that ovary activation may involve an epigenetic mechanism.
Experimental manipulation of ovary activation and gene expression in honey bee (Apis mellifera) queens and workers: testing hypotheses of reproductive regulation.
- G. Thompson, H. Yockey, Ju-Rak Lim, B. Oldroyd
- BiologyJournal of experimental zoology. Part A…
- 1 October 2007
This study uses CO2 narcosis to manipulate ovary activation in queens and workers, and quantified concomitant changes in gene expression using quantitative polymerase chain reaction to test hypotheses for the caste-specific regulation of ovaryactivation in honey bees.
Towards a molecular definition of worker sterility: differential gene expression and reproductive plasticity in honey bees
Overall, there is a trend for the most differentially expressed genes to be up‐regulated in wild‐type workers, which suggests that functional sterility in honey bee workers may generally involve the expression of a suite of genes that effectively ‘switch’ ovaries off, and that selfish reproduction is the default developmental pathway that results when ovary activation is not suppressed.
Genes underlying altruism
A set of intuitive criteria for the recognition and analysis of genes for altruism is developed and the first candidate genes affecting altruism from social insects and humans are described.