Phenotypic and genotypic analysis of age at first calving in Iranian Holstein dairy cows
Introduction: Age at first calving (AFC) has an important effect on profitability and reproductive management of dairy cattle. Every month increase in AFC beyond 24 months increases the cost of production. The time between birth and first calving represents a period in which replacement heifers are...
| Main Authors: | , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Ferdowsi University of Mashhad
2015-12-01
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| Series: | پژوهشهای علوم دامی ایران |
| Subjects: | |
| Online Access: | http://ijasr.um.ac.ir/index.php/animal/article/view/51521 |