Genomic merit for reproductive traits. I: Estrous characteristics and fertility in Holstein heifers.
automated estrous detection
estrous behavior
genetic selection
Journal
Journal of dairy science
ISSN: 1525-3198
Titre abrégé: J Dairy Sci
Pays: United States
ID NLM: 2985126R
Informations de publication
Date de publication:
Jul 2019
Jul 2019
Historique:
received:
13
06
2018
accepted:
30
01
2019
pubmed:
30
4
2019
medline:
21
8
2019
entrez:
30
4
2019
Statut:
ppublish
Résumé
Genetic selection of dairy cattle in the United States has included reproductive traits (daughter pregnancy rate, DPR; heifer conception rate, HCR), which is believed to have partly contributed to halting the decline in reproductive performance. The objectives of the current study were to evaluate the association among genomic merit for DPR (GDPR) and HCR (GHCR) with estrous characteristics measured by an automated device. Holstein heifers (n = 1,005) were genotyped at 2 mo of age and were classified into quartiles (Q1 = lowest, Q4 = highest) according to the GDPR and GHCR values of the study population. At 10 to 11 mo of age, heifers were fitted with a collar that recorded activity and rumination and determined the occurrence of estrus according to changes in activity and rumination compared with the individual's baseline values. Estrous characteristics of spontaneous estruses (SPE) and PGF
Identifiants
pubmed: 31030916
pii: S0022-0302(19)30370-4
doi: 10.3168/jds.2018-15205
pii:
doi:
Types de publication
Journal Article
Langues
eng
Pagination
6624-6638Informations de copyright
Copyright © 2019 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.