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Related Experiment Video

Updated: Jan 9, 2026

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

Inbreeding depression affecting stayability in Italian Holstein cows.

J C C Panetto¹, C Maltecca², M Ablondi³

¹Department of Agriculture, Food, Environment and Forestry, University of Florence, 50144 Florence, Italy; Embrapa Dairy Cattle, 36038-330 Juiz de Fora, Brazil.

Journal of Dairy Science

|December 4, 2025

Summary

This summary is machine-generated.

Increased inbreeding in Italian Holstein cows negatively impacts their longevity and productivity. Genomic inbreeding measures revealed greater effects on stayability, with recent inbreeding showing a more significant negative impact than ancient inbreeding.

Keywords:

dairy inbreeding pedigree runs of homozygosity

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Published on: August 8, 2017

Area of Science:

Animal Genetics
Dairy Cattle Breeding
Quantitative Genetics

Background:

Advances in genomic selection and assisted reproductive technologies have boosted dairy cattle productivity.
Widespread use of elite sires/dams has led to increased inbreeding, risking animal performance.
Inbreeding depression affects production, reproduction, and functional longevity in dairy cattle.

Purpose of the Study:

To evaluate the effect of inbreeding on stayability in the Italian Holstein population.
To compare different methods of estimating inbreeding coefficients (pedigree, genomic, runs of homozygosity).
To distinguish the impact of recent versus ancient inbreeding on cow stayability.

Main Methods:

Stayability was assessed across 5 parity periods (e.g., STAY12, STAY23).
Inbreeding coefficients were estimated using pedigree, genomic relationships, and runs of homozygosity (ROH).
Bayesian models estimated inbreeding effects on stayability, including milk yield as a fixed effect.

Main Results:

Increased inbreeding consistently decreased stayability in Italian Holstein cows.
Genomic inbreeding measures captured larger inbreeding depression effects than pedigree-based methods.
Inbreeding from long ROH segments (>2 Mb) reduced stayability, indicating recent inbreeding's negative impact.

Conclusions:

Inbreeding significantly reduces cow stayability in the Italian Holstein population.
Recent inbreeding poses a greater risk to stayability than ancient inbreeding.
Selection indices should incorporate production level and penalize future inbreeding for accurate stayability analysis.