2015 journal article

Short communication: Genomic selection for hoof lesions in first-parity US Holsteins

JOURNAL OF DAIRY SCIENCE, 98(5), 3502–3507.

By: K. Dhakal n, F. Tiezzi  n, J. Clay*  & C. Maltecca n 

co-author countries: United States of America πŸ‡ΊπŸ‡Έ
author keywords: genomic selection; hoof lesions; reliability
MeSH headings : Animals; Cattle; Cattle Diseases / genetics; Female; Foot Diseases / genetics; Foot Diseases / veterinary; Genomics; Hoof and Claw / metabolism; Parity; Pedigree; Phenotype; Pregnancy; Selection, Genetic; United States
Source: Web Of Science
Added: August 6, 2018

Hoof lesions contributing to lameness are crucial economic factors that hinder the profitability of dairy enterprises. Producer-recorded hoof lesions data of US Holsteins were categorized into infectious (abscess, digital and interdigital dermatitis, heel erosion, and foot rot) and noninfectious (korn, corkscrew, sole and toe ulcer, sole hemorrhage, white line separation, fissures, thin soles, and upper leg lesions) categories of hoof lesions. Pedigree- and genomic-based univariate analyses were conducted to estimate the variance components and heritability of infectious and noninfectious hoof lesions. A threshold sire model was used with fixed effects of year-seasons and random effects of herd and sire. For genomic-based analysis, a single-step procedure was conducted, incorporating H matrix to estimate genomic variance components and heritability for hoof lesions. The pedigree-based analysis produced heritability estimates of 0.11 (Β±0.05) for infectious hoof lesions and 0.08 (Β±0.05) for noninfectious hoof lesions. The single-step genomic analysis produced heritability estimates of 0.14 (Β±0.06) for infectious hoof lesions and 0.12 (Β±0.08) for noninfectious hoof lesions. Approximated genetic correlations between hoof lesion traits and hoof type traits along with productive life and net merit were all low and ranged between βˆ’0.25 and 0.14. Sire reliabilities increased, on average, by 0.24 and 0.18 for infectious and noninfectious hoof lesions, respectively, with incorporation of genomic data.