Genetic evaluation of reproductive performance in Canadian dairy cattle
A new genetic evaluation system for the reproductive performance of dairy cattle has been developed in Canada. The evaluation system includes all traits related to reproductive performance, namely age at first service as a heifer trait, interval from calving to first service for cows and 7 traits ea...
Main Author: | |
---|---|
Format: | Article |
Language: | English |
Published: |
Taylor & Francis Group
2010-04-01
|
Series: | Italian Journal of Animal Science |
Subjects: | |
Online Access: | http://www.aspajournal.it/index.php/ijas/article/view/2738 |
id |
doaj-bcdca6af75794bfb8d8668d6738365e1 |
---|---|
record_format |
Article |
spelling |
doaj-bcdca6af75794bfb8d8668d6738365e12020-11-25T01:36:25ZengTaylor & Francis GroupItalian Journal of Animal Science1594-40771828-051X2010-04-0161s293710.4081/ijas.2007.s1.29Genetic evaluation of reproductive performance in Canadian dairy cattleF. MigliorA new genetic evaluation system for the reproductive performance of dairy cattle has been developed in Canada. The evaluation system includes all traits related to reproductive performance, namely age at first service as a heifer trait, interval from calving to first service for cows and 7 traits each for both heifers and cows (56-days non return rate, interval from first service to conception, number of services to conception, gestation length, direct and maternal calving ease, direct and maternal calf survival and direct and maternal calf size). The model of analysis is a 16-trait animal model with different fixed effects according to the analyzed trait. Two indices for daughter fertility and calving performance have been developed. The impact of including the two indices in the national selection index was assessed.http://www.aspajournal.it/index.php/ijas/article/view/2738Genetic evaluation, Test day model, Reproduction, Selection indices |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
F. Miglior |
spellingShingle |
F. Miglior Genetic evaluation of reproductive performance in Canadian dairy cattle Italian Journal of Animal Science Genetic evaluation, Test day model, Reproduction, Selection indices |
author_facet |
F. Miglior |
author_sort |
F. Miglior |
title |
Genetic evaluation of reproductive performance in Canadian dairy cattle |
title_short |
Genetic evaluation of reproductive performance in Canadian dairy cattle |
title_full |
Genetic evaluation of reproductive performance in Canadian dairy cattle |
title_fullStr |
Genetic evaluation of reproductive performance in Canadian dairy cattle |
title_full_unstemmed |
Genetic evaluation of reproductive performance in Canadian dairy cattle |
title_sort |
genetic evaluation of reproductive performance in canadian dairy cattle |
publisher |
Taylor & Francis Group |
series |
Italian Journal of Animal Science |
issn |
1594-4077 1828-051X |
publishDate |
2010-04-01 |
description |
A new genetic evaluation system for the reproductive performance of dairy cattle has been developed in Canada. The evaluation system includes all traits related to reproductive performance, namely age at first service as a heifer trait, interval from calving to first service for cows and 7 traits each for both heifers and cows (56-days non return rate, interval from first service to conception, number of services to conception, gestation length, direct and maternal calving ease, direct and maternal calf survival and direct and maternal calf size). The model of analysis is a 16-trait animal model with different fixed effects according to the analyzed trait. Two indices for daughter fertility and calving performance have been developed. The impact of including the two indices in the national selection index was assessed. |
topic |
Genetic evaluation, Test day model, Reproduction, Selection indices |
url |
http://www.aspajournal.it/index.php/ijas/article/view/2738 |
work_keys_str_mv |
AT fmiglior geneticevaluationofreproductiveperformanceincanadiandairycattle |
_version_ |
1725063106593292288 |