Genetic and environmental factors that affect tick infestation in Nelore x Angus crossbreed cattle

Autor: Giovani Luis Feltes, Vanessa Tomazetti Michelotti, Alan Miranda Prestes, Paulo Roberto Nogara Rorato, Fernanda Cristina Breda Mello, Mauricio Morgado Oliveira, Vanerlei Mozaquatro Roso

Publikováno v: Ciência Rural, Vol 51, Iss 9 (2021)

ABSTRACT: This study evaluated the effects of seasons and latitude on tick counting and determined the best model to estimate genetic parameters for tick count and hair coat. Records of animals naturally exposed to ticks on farms in several Brazilian

Externí odkaz: https://doaj.org/article/a4cdc761a3754d6694a6f44da8d3ef9e

Milk production and percentages of fat and protein in Holstein breed cows raised in Rio Grande do Sul, Brazil

Autor: Giovani Luis Feltes, Vanessa Tomazetti Michelotti, Alan Miranda Prestes, André Padilha Bravo, Carlos Bondan, Mariana de Almeida Dornelles, Fernanda Cristina Breda, Paulo Roberto Nogara Rorato

Publikováno v: Ciência Rural, Vol 46, Iss 4, Pp 700-706 (2016)

ABSTRACT: The objective of this study was to identify a nonlinear regression model that better describes the milk production and the percentages of fat and protein curves, and to identify the season and age of calving that result in higher production

Externí odkaz: https://doaj.org/article/396fac7d5e284b73848e2667022d6f4b

Genotypic parameters for egg production in pure breed hens by using random regression model

Autor: Priscila Becker Ferreira, Paulo Roberto Nogara Rorato, Fernanda Cristina Breda, Vanessa Tomazetti Michelotti, Alexandre Pires Rosa, André Macedo

Publikováno v: Ciência Rural, Vol 47, Iss 5

ABSTRACT: This study aimed to test different genotypic and residual covariance matrix structures in random regression models to model the egg production of Barred Plymouth Rock and White Plymouth Rock hens aged between 5 and 12 months. In addition, w

Externí odkaz: https://doaj.org/article/eb425adbc4174ccfab2369b020eb699a

Genetic and environmental factors that affect tick infestation in Nelore x Angus crossbreed cattle

Autor: Paulo Roberto Nogara Rorato, Fernanda Cristina Breda Mello, Alan Miranda Prestes, Mauricio Morgado de Oliveira, Giovani Luis Feltes, V. M. Roso, Vanessa Tomazetti Michelotti

Publikováno v: Ciência Rural, Vol 51, Iss 9 (2021)
Ciência Rural v.51 n.9 2021
Ciência Rural
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM

This study evaluated the effects of seasons and latitude on tick counting and determined the best model to estimate genetic parameters for tick count and hair coat. Records of animals naturally exposed to ticks on farms in several Brazilian states an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58b96b48be07c06d0d4811218d0cdd7d
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782021000900651&tlng=en

Parâmetros genéticos para produção de leite no dia do controle de vacas da raça Holandesa utilizando modelos de análises de fatores e componentes principais

Autor: Luis Telo da Gama, Alan Miranda Prestes, Fernanda Cristina Breda, Vanessa Tomazetti Michelotti, Giovani Luis Feltes, Mariana de Almeida Dornelles, Carlos Bondan, Paulo Roberto Nogara Rorato, Jaime Araujo Cobuci

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Ciência Rural, Vol 45, Iss 6, Pp 1087-1092 (2015)
Ciência Rural v.45 n.6 2015
Ciência Rural
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM

Objetivou-se comparar um modelo multicaracterística padrão com modelos de análise de fatores (AF) e de componentes principais (CP) para estimar parâmetros genéticos para a produção de leite no dia do controle (PLDC) de vacas da raça Holandesa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd8b9a4b246ee07f8c7454fb827e303d
https://doi.org/10.1590/0103-8478cr20141076