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Cited by 73Genetic and phenotypic traits in livestockReproductive Physiology in LivestockEffects of Environmental Stressors on Livestock

The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.

Analysis of Inbreeding and Its Relationship with Functional Longevity in Canadian Dairy Cattle

Open access
Sewalem, A., Kistemaker, G.J., Miglior, F., Van Doormaal, B.J.·2006·Journal of Dairy Science
DOI 10.3168/jds.s0022-0302(06)72291-3
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Abstract

The aim of this study was to assess the level of inbreeding and its relationship to the functional survival of Canadian dairy breeds by using a Weibull proportional hazard model. Data consisted of records from 72,385 cows in 1,505 herds from 2,499 sires for Jerseys, 112,723 cows in 1,482 herds from 2,926 sires for Ayrshires, and 1,977,311 cows in 17,182 herds from 8,261 sires for Holsteins. Longevity was defined as the number of days from first calving to culling, death, or censoring. Inbreeding coefficients (F) were grouped into 7 classes (F = 0, 0 < F < 3.125, 3.125 < or = F < 6.25, 6.25 < or = F <12.5, 12.5 < or = F < 18.25, 18.25 < or = F < 25.0, and F > or = 25.0%). The statistical model included the effects of stage of lactation, season of production, the annual change in herd size, type of milk recording supervision, age at first calving, effects of milk, fat, and protein yields calculated as within herd-year-parity deviations, herd-year-season of calving, inbreeding, and sire. The relative culling rate was calculated for animals in each class after accounting for the above-mentioned effects. A trend toward increased risk of culling among more inbred animals was observed for all breeds. Little difference in survival was observed for cows with 0 < F <12.5%. The relative risk ratios (relative to F = 0) for cows with inbreeding coefficients up to 12.5% were 1.19, 1.16, and 1.14 for Jersey, Ayrshire, and Holstein cows, respectively. Greater effects of inbreeding were seen, however, when F increased beyond 12.5%.

Overview

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Crossref · 10.3168/jds.s0022-0302(06)72291-3

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Metadata

Authors
Sewalem, A., Kistemaker, G. J., Miglior, F., & Van Doormaal, B. J.
Affiliations
  • Agriculture and Agri-Food Canada (CA)
  • Canadian Dairy Network (CA)
Corresponding author
Sewalem, A.
ORCID
Venue
Journal of Dairy Science
Publisher
American Dairy Science Association
Published
2006-06
Volume
89
Issue
6
Pages
2210-2216
ISSN
0022-0302 (ISSN-L)
DOI
10.3168/jds.s0022-0302(06)72291-3
OpenAlex
W2109225663
Cited by
73
References
24
Citations by year
2025: 3 · 2024: 4 · 2023: 3 · 2022: 3 · 2021: 6 · 2020: 3 · 2019: 5 · 2018: 4 · 2017: 3 · 2016: 2 · 2015: 3 · 2014: 2 · 2013: 3 · 2012: 8
FWCI
1.52
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and phenotypic traits in livestock
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Reproductive Physiology in Livestock
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Effects of Environmental Stressors on Livestock
Keywords
inbreeding, inbreeding coefficient, functional longevity, dairy cattle, culling risk, Jersey cattle, Ayrshire cattle, Holstein cows, milk yield, age at first calving
MeSH terms
Aging, Algorithms, Animals, Canada, Cattle, Dairying, Fats, Female, Inbreeding, Lactation, Longevity, Male, Milk, Milk Proteins, Pedigree, Population Density, Pregnancy, Seasons, Proportional Hazards Models

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Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.