Genetic response to selection on reindeer calf weights
Selection response was investigated after 11 years of selection in the herding district of Ruvhten Sijte in Sweden (63°N,12°E) by comparing the weights of calves owned by herders applying selection with the weights of calves owned by herders not applying selection. Three owner groups in Ruvhten Sijt...
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Septentrio Academic Publishing
2003
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ftdoajarticles:oai:doaj.org/article:ef09168797514d5faef9a14e13a3fd8c 2023-05-15T18:03:56+02:00 Genetic response to selection on reindeer calf weights Lars Rönnegård Öje Danell 2003-04-01T00:00:00Z https://doi.org/10.7557/2.23.1.309 https://doaj.org/article/ef09168797514d5faef9a14e13a3fd8c EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/309 https://doaj.org/toc/1890-6729 doi:10.7557/2.23.1.309 1890-6729 https://doaj.org/article/ef09168797514d5faef9a14e13a3fd8c Rangifer, Vol 23, Iss 1 (2003) gene flow maternal effects random mating Rangifer t. tarandus subpopulations Animal culture SF1-1100 article 2003 ftdoajarticles https://doi.org/10.7557/2.23.1.309 2022-12-31T05:34:41Z Selection response was investigated after 11 years of selection in the herding district of Ruvhten Sijte in Sweden (63°N,12°E) by comparing the weights of calves owned by herders applying selection with the weights of calves owned by herders not applying selection. Three owner groups in Ruvhten Sijte have selected calves at the autumn slaughter every year since 1986 by retaining heavy calves. They own approximately 45% of the reindeer in Ruvhten Sijte. The other owners do not select on recorded weights, and all animals mix during the mating season. The recorded data on calf weights (1986 to 1997) consisted of 12 484 observations, with mean selection differentials of 2.9 kg and 4.6 kg for female and male calves, respectively (phenotypic standard deviation equal to 4.4 kg). The female generation interval was 6.4 years. In 1996 and 1997, autumn live weights of calves owned by herders applying selection (n = 971) were compared with the weights of calves owned by herders not applying selection (n = 1125). The observed difference was 0.67 kg (total mean = 42.6 kg), of which 0.32 kg was due to differences in dam age structure between the two types of herds, therefore the estimated difference in selection response was 0.35 kg. The realized heritability was 0.2. The potential response that would have been realized if the selected part of the herd had been isolated from gene flow was predicted to be 2.0 kg. In conclusion, the introduction of a selection programme applied by all owners in a herding district would result in an increase in calf weights of approximately 2 kg after two generations of selection. Article in Journal/Newspaper Rangifer Directory of Open Access Journals: DOAJ Articles Slaughter ENVELOPE(-85.633,-85.633,-78.617,-78.617) Rangifer 23 1 13 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
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English |
topic |
gene flow maternal effects random mating Rangifer t. tarandus subpopulations Animal culture SF1-1100 |
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gene flow maternal effects random mating Rangifer t. tarandus subpopulations Animal culture SF1-1100 Lars Rönnegård Öje Danell Genetic response to selection on reindeer calf weights |
topic_facet |
gene flow maternal effects random mating Rangifer t. tarandus subpopulations Animal culture SF1-1100 |
description |
Selection response was investigated after 11 years of selection in the herding district of Ruvhten Sijte in Sweden (63°N,12°E) by comparing the weights of calves owned by herders applying selection with the weights of calves owned by herders not applying selection. Three owner groups in Ruvhten Sijte have selected calves at the autumn slaughter every year since 1986 by retaining heavy calves. They own approximately 45% of the reindeer in Ruvhten Sijte. The other owners do not select on recorded weights, and all animals mix during the mating season. The recorded data on calf weights (1986 to 1997) consisted of 12 484 observations, with mean selection differentials of 2.9 kg and 4.6 kg for female and male calves, respectively (phenotypic standard deviation equal to 4.4 kg). The female generation interval was 6.4 years. In 1996 and 1997, autumn live weights of calves owned by herders applying selection (n = 971) were compared with the weights of calves owned by herders not applying selection (n = 1125). The observed difference was 0.67 kg (total mean = 42.6 kg), of which 0.32 kg was due to differences in dam age structure between the two types of herds, therefore the estimated difference in selection response was 0.35 kg. The realized heritability was 0.2. The potential response that would have been realized if the selected part of the herd had been isolated from gene flow was predicted to be 2.0 kg. In conclusion, the introduction of a selection programme applied by all owners in a herding district would result in an increase in calf weights of approximately 2 kg after two generations of selection. |
format |
Article in Journal/Newspaper |
author |
Lars Rönnegård Öje Danell |
author_facet |
Lars Rönnegård Öje Danell |
author_sort |
Lars Rönnegård |
title |
Genetic response to selection on reindeer calf weights |
title_short |
Genetic response to selection on reindeer calf weights |
title_full |
Genetic response to selection on reindeer calf weights |
title_fullStr |
Genetic response to selection on reindeer calf weights |
title_full_unstemmed |
Genetic response to selection on reindeer calf weights |
title_sort |
genetic response to selection on reindeer calf weights |
publisher |
Septentrio Academic Publishing |
publishDate |
2003 |
url |
https://doi.org/10.7557/2.23.1.309 https://doaj.org/article/ef09168797514d5faef9a14e13a3fd8c |
long_lat |
ENVELOPE(-85.633,-85.633,-78.617,-78.617) |
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Slaughter |
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Slaughter |
genre |
Rangifer |
genre_facet |
Rangifer |
op_source |
Rangifer, Vol 23, Iss 1 (2003) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/309 https://doaj.org/toc/1890-6729 doi:10.7557/2.23.1.309 1890-6729 https://doaj.org/article/ef09168797514d5faef9a14e13a3fd8c |
op_doi |
https://doi.org/10.7557/2.23.1.309 |
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Rangifer |
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23 |
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