Effect of captivity on genetic variance for five traits in the large milkweed bug (Oncopeltus fasciatus)

Heredity
K M Rodríguez-Clark

Abstract

Understanding the changes in genetic variance which may occur as populations move from nature into captivity has been considered important when populations in captivity are used as models of wild ones. However, the inherent significance of these changes has not previously been appreciated in a conservation context: are the methods aimed at founding captive populations with gene diversity representative of natural populations likely also to capture representative quantitative genetic variation? Here, I investigate changes in heritability and a less traditional measure, evolvability, between nature and captivity for the large milkweed bug, Oncopeltus fasciatus, to address this question. Founders were collected from a 100-km transect across the north-eastern US, and five traits (wing colour, pronotum colour, wing length, early fecundity and later fecundity) were recorded for founders and for their offspring during two generations in captivity. Analyses reveal significant heritable variation for some life history and morphological traits in both environments, with comparable absolute levels of evolvability across all traits (0-30%). Randomization tests show that while changes in heritability and total phenotypic variance were highl...Continue Reading

References

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Citations

Oct 20, 2006·Archives of Oral Biology·Leslea J Hlusko, Michael C Mahaney
Nov 21, 2017·American Journal of Physical Anthropology·Jessica L JoganicJames M Cheverud

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