Inheritance of body size in the Barnacle Goose under different environmental conditions
Article first published online: 11 DEC 2002
Journal of Evolutionary Biology
Volume 6, Issue 2, pages 195–208, March 1993
How to Cite
Larsson, K. (1993), Inheritance of body size in the Barnacle Goose under different environmental conditions. Journal of Evolutionary Biology, 6: 195–208. doi: 10.1046/j.1420-9101.1993.6020195.x
- Issue published online: 11 DEC 2002
- Article first published online: 11 DEC 2002
- Received 24 October 1991; Accepted 9 April 1992.
- Cited By
- Barnacle Goose;
- body size;
- Branta leucopsis;
- genetic covariance;
- genotype-environment interaction;
Heritabilities, genetic variances and covariances for body size traits, i.e. tarsus length, head length and body mass, were estimated under different environmental conditions in a Barnacle Goose (Branta leucopsis) population. Under poor growth conditions, that is, when average body size of fully grown offspring in a given cohort was small, the offspring-parent regressions and full-sib analyses yielded heritability estimates not significantly different from zero. By contrast, when growth conditions were normal or good the heritability estimates were generally significantly positive. Comparisons of genetic covariance estimates indicated that they also differed across the analysed environmental conditions. This result, together with similar results obtained in studies of passerine birds, suggests that genotype-environment interactions might be frequent within the range of environments normally encountered by birds in natural populations. If general, such results might question the validity of assuming approximate constancy of additive genetic variances and covariances over time and environments in evolutionary models.