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Macro- and micro-genetic environmental sensitivity for 400-day weight in Australian Angus |
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Paper presented by Mette Madsen |
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Association for the Advancement of Animal Breeding and Genetics (AAABG) |
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Genotype by environment interactions can be caused by both macro- and micro-genetic environmental sensitivity (GES ). In the current study, 400 day weight (400DW) measured on Australian Angus was analysed using a variability model and a reaction norm model to obtain estimates for genetic variation due to macro- and micro-GES. The results showed additive genetic variance for both macro- and micro-GES. Over the range of contemporary group means the macro-GES impacted the genetic variance and ranking of sires across environments. The presence of micro-GES indicated the possibility of selecting to reduce the variability of phenotypes, but further investigation into the consequences is needed. |
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Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.24, p. 217-221 |
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