Value of early weight measurements as predictors of body weight at later ages in reindeer
Phenotypic variances in live weight in a reindeer population and repeatabilities of the weights were estimated. The population consisted of 1847 and 1878 unselected male and female calves respectively, for which data from weighings at 2 and 7 months of age were available. All individuals in a select...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Septentrio Academic Publishing
1993-12-01
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| Series: | Rangifer |
| Subjects: | |
| Online Access: | https://septentrio.uit.no/index.php/rangifer/article/view/1115 |
| _version_ | 1819086965749841920 |
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| author | C.J. Petersson B. Danell |
| author_facet | C.J. Petersson B. Danell |
| author_sort | C.J. Petersson |
| collection | DOAJ |
| description | Phenotypic variances in live weight in a reindeer population and repeatabilities of the weights were estimated. The population consisted of 1847 and 1878 unselected male and female calves respectively, for which data from weighings at 2 and 7 months of age were available. All individuals in a selected population, consisting of 469 of the heaviest females, were weighed at 2, 7 and 19 months of age. The data were colleted during four successive years, 1986 - 1989. An indirect selection model for improving female weight at 19 months of age was proposed. Variance in the unselected population was higher between animals than within animals. Repeatability was estimated to be 0.636 for the male calves and 0.609 for the female calves. In the selected population, within-individual variance was higher than between-animal variance. Repeatabilities were, after correction for the effect of selection, 0.316 (between 2 and 19 months) and 0.548 (between 7 and 19 months). The aim of the selection model was to increase the average weight in the primiparous group to improve their calf production ability. Using the model, the number of animals weighing equal to or more than a certain threshold weight and the number needed for recruitment at 19 months of age could be determined. |
| first_indexed | 2024-12-21T21:28:38Z |
| format | Article |
| id | doaj.art-1cb1527d0c894b4dbe460d59ed309f9b |
| institution | Directory Open Access Journal |
| issn | 1890-6729 |
| language | English |
| last_indexed | 2024-12-21T21:28:38Z |
| publishDate | 1993-12-01 |
| publisher | Septentrio Academic Publishing |
| record_format | Article |
| series | Rangifer |
| spelling | doaj.art-1cb1527d0c894b4dbe460d59ed309f9b2022-12-21T18:49:40ZengSeptentrio Academic PublishingRangifer1890-67291993-12-0113410.7557/2.13.4.11151049Value of early weight measurements as predictors of body weight at later ages in reindeerC.J. Petersson0B. Danell1Dept. of Animal Breeding and Genetics, The Swedish University of Agricultural Sciences, S-75007 Uppsala, SwedenDept. of Animal Breeding and Genetics, The Swedish University of Agricultural Sciences, S-75007 Uppsala, SwedenPhenotypic variances in live weight in a reindeer population and repeatabilities of the weights were estimated. The population consisted of 1847 and 1878 unselected male and female calves respectively, for which data from weighings at 2 and 7 months of age were available. All individuals in a selected population, consisting of 469 of the heaviest females, were weighed at 2, 7 and 19 months of age. The data were colleted during four successive years, 1986 - 1989. An indirect selection model for improving female weight at 19 months of age was proposed. Variance in the unselected population was higher between animals than within animals. Repeatability was estimated to be 0.636 for the male calves and 0.609 for the female calves. In the selected population, within-individual variance was higher than between-animal variance. Repeatabilities were, after correction for the effect of selection, 0.316 (between 2 and 19 months) and 0.548 (between 7 and 19 months). The aim of the selection model was to increase the average weight in the primiparous group to improve their calf production ability. Using the model, the number of animals weighing equal to or more than a certain threshold weight and the number needed for recruitment at 19 months of age could be determined.https://septentrio.uit.no/index.php/rangifer/article/view/1115selectionrepeatabilityreindeerweight selection |
| spellingShingle | C.J. Petersson B. Danell Value of early weight measurements as predictors of body weight at later ages in reindeer Rangifer selection repeatability reindeer weight selection |
| title | Value of early weight measurements as predictors of body weight at later ages in reindeer |
| title_full | Value of early weight measurements as predictors of body weight at later ages in reindeer |
| title_fullStr | Value of early weight measurements as predictors of body weight at later ages in reindeer |
| title_full_unstemmed | Value of early weight measurements as predictors of body weight at later ages in reindeer |
| title_short | Value of early weight measurements as predictors of body weight at later ages in reindeer |
| title_sort | value of early weight measurements as predictors of body weight at later ages in reindeer |
| topic | selection repeatability reindeer weight selection |
| url | https://septentrio.uit.no/index.php/rangifer/article/view/1115 |
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