L R Schaeffer
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Explore the profile of L R Schaeffer including associated specialties, affiliations and a list of published articles.
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72
Citations
719
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Recent Articles
1.
Oliveira Junior G, Schaeffer L, Schenkel F, Tiezzi F, Baes C
J Dairy Sci
. 2021 Feb;
104(4):4404-4412.
PMID: 33612215
About 30% of producers use hormone protocols to synchronize ovulation and perform timed artificial insemination (AI) in Canada. Days from calving to first service (CTFS) and first service to conception...
2.
Oliveira H, Brito L, Lourenco D, Silva F, Jamrozik J, Schaeffer L, et al.
J Dairy Sci
. 2019 Jul;
102(9):7664-7683.
PMID: 31255270
An important goal in animal breeding is to improve longitudinal traits; that is, traits recorded multiple times during an individual's lifetime or physiological cycle. Longitudinal traits were first genetically evaluated...
3.
Schaeffer L
J Anim Breed Genet
. 2018 Mar;
135(2):124-131.
PMID: 29575102
Animal models evolved from sire models and inherited some issues that affected sire models. Those issues include definition and treatment of contemporary groups, accounting for time trends and dealing with...
4.
Rodda D, Schaeffer L, Mullen K, Friars G
Theor Appl Genet
. 2013 Dec;
51(1):35-9.
PMID: 24317536
Approximate standard errors of genetic parameter estimates were obtained using a simulation technique and approximation formulae for a simple statistical model. The similarity of the corresponding estimates of standard errors...
5.
Gomez-Raya L, Schaeffer L, Burnside E
Theor Appl Genet
. 2013 Nov;
81(5):624-8.
PMID: 24221377
Standard methods to estimate heritability by half-sib correlation are biased if selection has operated in the parental generation. In this paper a simple method to correct for selection of animals...
6.
Loker S, Bastin C, Miglior F, Sewalem A, Schaeffer L, Jamrozik J, et al.
J Dairy Sci
. 2013 Apr;
96(6):3994-4004.
PMID: 23548298
Valacta (Sainte-Anne-de-Bellevue, Québec, Canada) is the Canadian Dairy Herd Improvement organization responsible for milk recording in Québec and Atlantic provinces. Up to 14 first-lactation body condition score (BCS) records were...
7.
Loker S, Miglior F, Koeck A, Neuenschwander T, Bastin C, Jamrozik J, et al.
J Dairy Sci
. 2012 Sep;
95(11):6770-80.
PMID: 22981569
The objective of this research was to estimate daily genetic correlations between longitudinal body condition score (BCS) and health traits by using a random regression animal model in first-lactation Holsteins....
8.
Cartwright S, Schaeffer L, Burnside E, Mallard B
J Anim Sci
. 2012 May;
90(9):2970-8.
PMID: 22585796
The objectives of this study were to evaluate antibody (AMIR) and cell-mediated immune responses (CMIR), survival, and somatic cell score (SCS) between purebred Holstein (HO) and crossbred Norwegian Red ×...
9.
Eikje L, Schaeffer L, Adnoy T, Klemetsdal G, Odegard J
J Anim Breed Genet
. 2012 May;
129(3):188-94.
PMID: 22583323
A method of approximating estimated breeding values (EBV) from a multivariate distribution of true breeding values (TBV) and EBV is proposed for use in large-scale stochastic simulation of alternative breeding...
10.
Eikje L, Schaeffer L, Adnoy T, Klemetsdal G
Animal
. 2012 Mar;
5(3):367-77.
PMID: 22445403
Alternative Norwegian sheep breeding schemes were evaluated by stochastic simulation of a breeding population with about 120 000 ewes, considering the gain for an aggregate genotype including nine traits and...