Sociality and the Rate of rDNA Sequence Evolution in Wasps (Vespidae) and Honeybees (Apfs)
نویسنده
چکیده
Sequence data of mitochondrial 165 ribosomal DNA (mt-rDNA) and nuclear 28S ribosomal DNA (nuc-rDNA) were compared in two honeybee species (Apis mellifera and Apis dorsata) and a selection of 22 wasp species (Vespidae) with different levels of sociality. The averge substitution rates in mt-rDNA and nucrDNA were almost-equal in solitary species. ln species with larger nests, however, the difference between the nuclear and the mitochondrial substitution rate significantly increased. The average substitution ratio, r.f (nucleotide substitutions in mt-rDNA/nucleotide substitutions in nuc-rDNA) was 1 .48 + 0J2 (SE) among the solitary Eumeninae, 3.70 t 0. l5 among five primitive social Stenogastrinae species, 3.24 + 0.20 among five Polistinae species, 5.76 + 0.33 among nine highly eusocial Vespinae, and l2.l in the two Apis species. The high egg-laying rate and the effective population size skew between the sexes may contribute to the rise of the substitution ratio in the highly eusocial species. Dritt and bottleneck effects in the mitochondrial DNA pool during speciation events as well as polyandry may further enhance this phenomenon.
منابع مشابه
Sociality and the rate of molecular evolution.
The molecular clock does not tick at a uniform rate in all taxa but may be influenced by species characteristics. Eusocial species (those with reproductive division of labor) have been predicted to have faster rates of molecular evolution than their nonsocial relatives because of greatly reduced effective population size; if most individuals in a population are nonreproductive and only one or f...
متن کاملDistributed cognition and social brains: reductions in mushroom body investment accompanied the origins of sociality in wasps (Hymenoptera: Vespidae).
The social brain hypothesis assumes the evolution of social behaviour changes animals' ecological environments, and predicts evolutionary shifts in social structure will be associated with changes in brain investment. Most social brain models to date assume social behaviour imposes additional cognitive challenges to animals, favouring the evolution of increased brain investment. Here, we presen...
متن کاملSimilarity of Amino Acids in Nectar and Larval Saliva: the Nutritional Basis for Trophallaxis in Social Wasps.
Larvae of social wasps of the family Vespidae produce an oral exudate that is imbibed by attendant adults. Passage of this liquid from larvae to adults is the key feature of trophallaxis behavior (Wheeler, 1918), which has recently been reviewed by Wilson (1971), Spradbery (1973), and Jeanne (1980). Exchange of alimentary liquid among adults is also generally viewed as a component of trophallax...
متن کاملCorrelated evolution of colony defence and social structure: A comparative analysis in eusocial wasps (Hymenoptera: Vespidae)
Animal societies depend on effective defence of group resources. Defensive mechanisms can be costly and may constrain the evolution of social structure. We analysed how exocrine mechanisms of colony defence were affected by the evolution of social complexity and of nest architecture in paper wasps (Vespidae). Eusocial paper wasp species exhibit two discrete grades of eusociality, with new colon...
متن کاملGrowth and pruning of mushroom body Kenyon cell dendrites during worker behavioral development in the paper wasp, Polybia aequatorialis (Hymenoptera: Vespidae).
Adult workers of some social insect species show dramatic behavioral changes as they pass through a sequence of task specializations. In the paper wasp, Polybia aequatorialis, female workers begin adult life within the nest tending brood, progress to maintaining and defending the nest exterior, and ultimately leave the nest to forage. The mushroom body (MB) calyx neuropil increases in volume as...
متن کامل