Thelytokous parthenogenesis and its consequences on inbreeding in an ant

Article Abstract:

A study investigates the cytological mechanism of thelytokous parthenogenesis, that is, the production of diploid daughters from unfertilized eggs, and its impact on inbreeding in the ant Cataglyphis cursor. Results show that the cytological mechanism responsible for thelytokous parthenogenesis in queens of the species is automictic parthenogenesis with central fusion and that more than 60% of the colonies should be headed by a worker-produced queen, suggesting that the queen's lifespan is low in this species.

Science & research, Belgium, Public affairs, Sexual behavior, Social aspects, Research, Ants, Parthenogenesis

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An investigation of inbreeding depression and purging in captive pedigreed populations

Article Abstract:

Regression models are used for examining the effects of inbreeding in zoo populations, encompassing several species of mammals, birds, reptiles and amphibians. The analysis has re-emphasized the necessity to avoid inbreeding in captive breeding programs and has shown that purging cannot be depended on removing deleterious alleles from zoo populations.

Environmental aspects, Zoo animals, Animal breeding

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Analysis of inbreeding depression in the first litter size of mice in a long-term selection experiment with respect to the age of the inbreeding

Article Abstract:

A long-term selection empirical study of inbreeding depression in the first-litter size of mice, in terms of the age of inbreeding, is described, which identifies the deviation from the classical technique, specifically, examining the distinctions between the effects of inbreeding in recent generation from that in the more distant past.

Natural selection

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