Document Detail

Polymorphisms in the bovine leptin gene associated with perinatal mortality in Holstein-Friesian heifers.
MedLine Citation:
PMID:  20059932     Owner:  NLM     Status:  MEDLINE    
Leptin is an important regulator of fetal and placental growth. This study evaluated the association of single nucleotide polymorphisms (SNP) in the leptin gene with perinatal mortality (stillbirths and mortality within 24h of parturition) in 385 Holstein-Friesian heifers on 18 dairy farms in the United Kingdom. The 3 SNP evaluated were exon 2FB, UASMS1, and UASMS2. The mean age at first calving was 27.0+/-0.2 mo. Associations between each SNP and perinatal mortality (calf alive or dead) were tested using a generalized linear model that included herd-year-season, calf sex, age at first calving, and age and pedigree of the dam. The overall level of perinatal mortality in the population was 16.9%, with significant allelic substitution effects for exon 2FB and UASMS1. These 2 SNP were in close linkage disequilibrium with each other (r(2)=0.98) but not with UASMS2 (r(2)=0.10). For exon 2FB, perinatal mortality was similar between heifers carrying the CT and TT alleles (20%), but was higher than in heifers carrying the CC allele (11%). For UASMS1, mortality was 21% with the CC and CT alleles but only 10% with the TT allele. No associations of perinatal mortality with SNP were found in the UASMS2 data set, possibly influenced by the low frequency (2%) of the TT genotype. No significant effects of herd-year-season, age at first calving, or calf sex were found. In conclusion, polymorphisms in the leptin gene were associated with 2-fold differences in perinatal mortality in dairy heifers.
J S Brickell; G E Pollott; A M Clempson; N Otter; D C Wathes
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  93     ISSN:  1525-3198     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-01-11     Completed Date:  2010-04-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  340-7     Citation Subset:  IM    
Copyright Information:
Copyright 2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.
Royal Veterinary College, Hatfield, Hertfordshire AL9 7TA, United Kingdom.
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MeSH Terms
Cattle / genetics*
Gene Frequency
Leptin / genetics*
Linear Models
Perinatal Mortality*
Polymorphism, Single Nucleotide / genetics*
Reg. No./Substance:

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