Source: Journal of Dairy Science
M.J.VandeHaar*L.E.Armentano†K.Weigel†D.M.Spurlock‡R.J.Tempelman*R.Veerkamp§
*
Department of Animal Science, Michigan State University, East Lansing 48824
†
Department of Dairy Science, University of Wisconsin, Madison 53706
‡
Department of Animal Sciences, Iowa State University, Ames 50011
§
Animal Breeding...
Source: MDPI
Dave J. Seymour1,3,†, Dagnachew Hailemariam4, Graham Plastow4, Hinayah R. de Oliveira1,2,‡, Christine F. Baes1,5 and Flavio S. Schenkel1,*
1Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, University of Guelph, Guelph, ON N1G 2W1, Canada
2Lactanet Canada, Guelph, ON N1K...
Source: Lactanet, by: Brian Van Doormaal
Today, essentially every bull with semen available to Ayrshire breeders was pre-selected by the A.I. organization based on genomic testing and has an official genomic evaluation published by Lactanet. In this way, there has...
Source: Cornell University
By: Lorianna Keuhn and Tyler Olson
As the field of genetics has advanced, new undesirable haplotypes have been discovered. Among these are fertility haplotypes and congenital defects. As genotyping has become more prevalent on farms, the question of...
Source: Holstein Canada
Genetic Traits and Colour Codes
Gene Name
Description
Gene and Expression Code
BY
Brachyspina
(causes abortion & stillborn, shortened spinal cord, long legs & abnormal organs)
BYC = tested carrier of Brachyspina
BYF = tested non-carrier of Brachyspina
CVM
Complex Vertebral Malformation
(causes still-born calves, abortions, and early...
Source: CDCB
Changes for the December 5, 2023, CDCB evaluations include updated imputation results for all breeds, new haplotype calls for early onset muscle weakness syndrome in Holsteins, and update to the haplotype calls for cholesterol deficiency in Holsteins.
Full-population imputation...
Source: ScienceDirect
L.F.BritoaN.BederebF.DouhardcH.R.OliveiraadM.ArnalceF.PeñagaricanofA.P.SchinckelaC.F.BaesdgF.Migliord
a
Department of Animal Sciences, Purdue University, 270 S. Russell Street, West Lafayette, IN 47 907, USA
b
INRAE, Institut Agro, PEGASE, 35 590 Saint-Gilles, France
c
GenPhySE, Université de Toulouse, INRAE, ENVT, F-31326 Castanet Tolosan, France
d
...
Episode Description
Still reeling from the science outlined by Filippo Miglior, PhD, in episode 6 of the pod? Us too. That’s why we invited special guest, Christine Baes, PHD, to give us a download on the follow-up project. Christine is...
Source: Lactanet, Brian Van Doormaal
Where the relative emphasis placed on each of the three main components in each breed is presented in the following table along with the multiplicative factors for each component.
Breed
LPI Constant
Production
Durability
Health & Fertility
Emphasis
Factor
Emphasis
Factor
Emphasis
Factor
Ayrshire
2004
46
.5685
32
.7215
22
.9561
Brown Swiss
959
55
.5440
27
.6786
18
.8349
Canadienne
932
55
.4565
30
.6653
15
.8759
Guernsey
644
50
.5540
35
.7523
15
.6923
Holstein
2200
40
.5408
40
.8243
20
.6967
Jersey
1087
50
.5970
30
.6387
20
.7483
Milking Shorthorn
1065
56
.5389
30
.7992
14
1.0363
Production Component...
Source: Journal of Dairy Science, L. Ma1,†, J.B. Cole2 Y. Da3 P.M. VanRaden2
ABSTRACT
Before fertility traits were incorporated into selection, dairy cattle breeding primarily focused on production traits, which resulted in an unfavorable decline in the reproductive performance of dairy cattle. This reduced fertility...
