Quantitative genetic variation of metabolism in the nymphs of the sand cricket, Gryllus firmus, inferred from an analysis of inbred-lines

Quantitative genetic variation of metabolism in the nymphs of the sand cricket, Gryllus firmus, inferred from an analysis of inbred-lines

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Compared with morphological and life history traits, quantitative genetic variation of metabolic and related traits in animals has been poorly studied.We used flow-through VC0(2) respirometry and simultaneous activity measurement on nymphs of the neflintw-r6mpw sand cricket {Gryllus firmus) from inbred lines to estimate broad-sense heritability of four metabolic variables.In addition, we measured a number of linear dimensions in the adults from the same inbred lines.There were significant multivariate effects of inbred lines for all traits and broad-sense heritability for physiological traits was 4.

5%, 5.2%, 10.3% and 8.5% for average, resting, minimum and maximum C0(2) production in nymphs, respectively.

Though the MANOVA chiggate.com indicated significant genetic variation among inbred lines in adult morphology, the broad-sense heritabilities were relatively low ranging from 0-18%.Our results indicate that the heritabilities of metabolic measures are large enough to potentially respond to selection.