Evolutionary Demography of a Bruchid Beetle. I. Quantitative Genetical Analysis of the Female Life History

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Abstract
The quantitative genetical technique can provide a qualitative and a quantitative measure of trade-offs between characters in a genetically polymorphic population. Quantitative genetical analysis of the life history of female Callosobruchus maculatus (F.) shows that egg to adult development rate is genetically negatively correlated with both adult longevity and fecundity, while the last two traits are positively correlated. These results are consistent with the existence of trade-offs between development rate, adult longevity and fecundity, constraining the animal's evolutionary options in the culture environment. The trade-offs come about because of effects of adult body weight. Heavier genotypes take longer to mature, but then enjoy increased fecundity and live longer.

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