Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Janusz Jamrozik"'
Autor:
Hinayah Rojas de Oliveira, Gabriel S. Campos, Sirlene F. Lazaro, Janusz Jamrozik, Alan Schinckel, Luiz F. Brito
Publikováno v:
JDS Communications, Vol 5, Iss 3, Pp 241-246 (2024)
Lactation curves, which describe the production pattern of milk-related traits over time, provide insightful information about individual cow health, resilience, and milk production efficiency. Key functional traits can be derived through lactation c
Externí odkaz:
https://doaj.org/article/847deb5175044685b504b3d096afd782
Autor:
Flavio S Schenkel, Janusz Jamrozik, Luiz F. Brito, Yutaka Masuda, Hinayah R. Oliveira, Shogo Tsuruta, John P. Cant, D. A. L. Lourenco, F. F. e Silva, Ignacy Misztal
Publikováno v:
Journal of Dairy Science. 102:9995-10011
Estimating single nucleotide polymorphism (SNP) effects over time is essential to identify and validate candidate genes (or quantitative trait loci) associated with time-dependent variation of economically important traits and to better understand th
Autor:
Hinayah R. Oliveira, Janusz Jamrozik, Luiz F. Brito, Daniela Lourenco, F. F. e Silva, Flavio S Schenkel, L.R. Schaeffer
Publikováno v:
Journal of Dairy Science. 102:7664-7683
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 based on accumulated phenotyp
Autor:
Hinayah R. Oliveira, Flavio S Schenkel, John P. Cant, Pablo A. S. Fonseca, T.C.S. Chud, Janusz Jamrozik, F. F. e Silva, Fabieli Loise Braga Feitosa, Luiz F. Brito, D. A. L. Lourenco
Publikováno v:
Journal of Dairy Science. 102:8159-8174
We performed genome-wide association analyses for milk, fat, and protein yields and somatic cell score based on lactation stages in the first 3 parities of Canadian Ayrshire, Holstein, and Jersey cattle. The genome-wide association analyses were perf
Autor:
Hinayah R. Oliveira, Janusz Jamrozik, Mehdi Sargolzaei, Daniela Lourenco, Flavio S Schenkel, Luiz F. Brito, Fabyano Fonseca e Silva
Publikováno v:
Journal of Animal Breeding and Genetics. 136:441-452
The objective of this study was to investigate the impact of accounting for parent average (PA) and genotyped daughters' average (GDA) on the estimation of deregressed estimated breeding values (dEBVs) used as pseudo-phenotypes in multiple-step genom
Autor:
Janusz Jamrozik, Luiz F. Brito, Daniela Lourenco, Flavio S Schenkel, Yutaka Masuda, Ignacy Misztal, Hinayah R. Oliveira, F. F. e Silva, Shogo Tsuruta
Publikováno v:
LOCUS Repositório Institucional da UFV
Universidade Federal de Viçosa (UFV)
instacron:UFV
Universidade Federal de Viçosa (UFV)
instacron:UFV
Test-day traits are important for genetic evaluation in dairy cattle and are better modeled by multiple-trait random regression models (RRM). The reliability and bias of genomic estimated breeding values (GEBV) predicted using multiple-trait RRM via
Autor:
Janusz Jamrozik, C.M. Richardson, Flavio S Schenkel, Anne-Marie Christen, F. Malchiodi, Filippo Miglior, David F. Kelton, G.J. Kistemaker, V. Daniel, A. Fleming
Publikováno v:
Journal of dairy science. 103(6)
Hoof lesions represent an important issue in modern dairy herds, with reported prevalence in different countries ranging from 40 to 70%. This high prevalence of hoof lesions has both economic and social consequences, resulting in increased labor expe
Autor:
R.A. Ali, Janusz Jamrozik, A. Fleming, Mehdi Sargolzaei, Bonnie A. Mallard, Filippo Miglior, Flavio S Schenkel, F. Malchiodi, J. Johnston
Publikováno v:
Journal of Dairy Science. 101:4295-4306
The objective of this research was to estimate the genetic correlations between milk mid-infrared-predicted fatty acid groups and production traits in first-parity Canadian Holsteins. Contents of short-chain, medium-chain, long-chain, saturated, and
Autor:
A.R. Guarini, Janusz Jamrozik, F. F. e Silva, Flavio S Schenkel, Luiz F. Brito, H.R. de Oliveira
Publikováno v:
LOCUS Repositório Institucional da UFV
Universidade Federal de Viçosa (UFV)
instacron:UFV
Universidade Federal de Viçosa (UFV)
instacron:UFV
Summary We aimed to investigate the performance of three deregression methods (VanRaden, VR; Wiggans, WG; and Garrick, GR) of cows’ and bulls’ breeding values to be used as pseudophenotypes in the genomic evaluation of test-day dairy production t
Autor:
Janusz Jamrozik, A. Koeck, S. G. Narayana, Filippo Miglior, J. Johnston, F. Malchiodi, Mehdi Sargolzaei, A. Fleming, Flavio S Schenkel
Publikováno v:
Journal of Dairy Science. 100:4731-4744
The objective of this study was to investigate genetic variability of mid-infrared predicted fatty acid groups in Canadian Holstein cattle. Genetic parameters were estimated for 5 groups of fatty acids: short-chain (4 to 10 carbons), medium-chain (11