Marcos Paulo Gonçalves de Rezende

Southwest Bahia State University

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Júlio César de Souza

Universidade Federal de Mato Grosso do Sul

Paulo Luíz Souza Carneiro

Southwest Bahia State University

Carlos Henrique Mendes Malhado

Southwest Bahia State University

Geovane Gonçalves Ramires

Universidade Federal de Mato Grosso do Sul

Riccardo Bozzi

University of Florence

Nicacia Monteiro Oliveira

Universidade Federal de Mato Grosso do Sul

U. G. P. de Abreu

Brazilian Agricultural Research Corporation

Johnny Iglesias Mendes Araújo

Southwest Bahia State University

Raimundo Martins Filho

Universidade Federal do Cariri

Carolina Fregonesi de Souza

Universidade Federal de Uberlândia

Cooperative Institutions

Southwest Bahia State University

Universidade Estadual de Mato Grosso do Sul

Universidade Federal de Mato Grosso do Sul

European Union of Medical Specialists

National Council for Scientific and Technological Development

Universidade Federal do Piauí

Brazilian Agricultural Research Corporation

University of Florence

Universidade Estadual Paulista (Unesp)

Universidade Federal do Paraná

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Parameters and genetic trends for reproductive characteristics of a closed Angus herd

Revista Colombiana de Ciencias Pecuarias (2018)

Vanius Falleiro Paulo L. S. Carneiro Jose A Carrilo Marcos Paulo Gonçalves de Rezende Marcelo Cervini

Background: Closed breeding populations are usefull to conduct basic and applied research. The Wye Angus herd is one of them. It was founded using only a few animals. The pedigree of the descendants of the original herd can be completely described by historical records resulting from strong selection. Wye Angus genetics has influenced that of Aberdeen Angus, Red Angus, and Brangus cattle worldwide. Objective: To evaluate parameters and genetic trends associated with the reproduction traits of the Wye Angus herd between the years 1937 and 2012. Methods: We used pedigree information of 11,692 individuals. The reproductive traits assessed were age at first calving (AFC), calving interval (CI), and scrotal circumference (SC). The covariance components were estimated by Bayesian inference. The genetic trends were obtained by linear regression of the genetic values over birth years of the animals. Results: The heritability estimates for AFC, and CI were negligible, although a small genetic gain was associated with CI. Because the AFC and CI values of the herd are small, past reproductive management has produced favourable results for the heifers. Conclusion: The Wye Angus herd has enough genetic variability for genetic gain through selection on SC.

Genetic correlation

Genetic gain

10.17533/udea.rccp.v32n3a04

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Performance in preweaning pure and crossbred calves in the Mato Grosso do Sul Pantanal region, Aquidauana, Mato Grosso do Sul State, Brazil

Figshare (2021)

Fabio Rafael Leão Fialho Marcos Paulo Gonçalves de Rezende Júlio César de Souza Rosana Moreira Da Silva Nicacia Monteiro Oliveira

ABSTRACT. Purebred and crossbred calves (n = 3,871) were selected that were born in the sub-region of the Pantanal of Aquidauana (Brazil), derived from Nellore, Brangus, Wagyu, and 1/2 Brangus + 1/2 Nellore cows, which were artificially inseminated by bulls of the Aberdeen Angus, Red Angus, Brangus, Nellore, and Wagyubreeds. Parameters such as weaning weight, daily gain from birth to weaning, and the number of days to gain 160 kg, were assessed inthese calves and phenotypic correlations between the traits were evaluated. Data were analyzed using two statistical models. The first model included sire breed effects, the genetic group of the cow, sex, year of birth (AN), birth season (EN), and the interaction AN * EN. The second model included the genetic group of the calf, sex, AN, EN, and the interaction AN * EN. The genetic group of the cow and calf and the interaction AN * EN did not significantly affect body weight (p < 0.05). The average weaning weights of progeny were as follows: Aberdeen Angus bulls, 177.70 ± 3.28 kg; Red Angus, 180.31 ± 3.46 kg; Brangus, 181.48 ± 3.15 kg; Nellore, 175.43 ± 3.60 kg; and Wagyu, 173.16 ± 2.96 kg.

10.6084/m9.figshare.14288259

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Heritability and genetic correlation of body weight and Kleiber ratio in Limousin and Charolais beef cattle breeds

animal (2022)

Marcos Paulo Gonçalves de Rezende Carlos Henrique Mendes Malhado Stefano Biffani J.A. Carrillo-Tabakman Marco Fabbri

Reducing the environmental impact of livestock production is now indispensable and genetic selection can be of great support for this purpose. Measures that can identify high body growth at low maintenance costs in production animals are particularly useful since resources have been increasingly limited. Therefore, the goal of this study was to estimate genetic parameters for BW and Kleiber ratio (KR) in 210-day-old and 365-day-old Charolais and Limousin breeds. A database comprising animals born from 1999 to 2018 was used in a multitrait model applying Bayesian inference. The heritability for BW is high in Charolais (0.39 and 0.42 for BW210 and BW365, respectively) and moderate in Limousin (0.22), indicating possible genetic gains for BW in both breeds. The genetic variability of KR should also allow satisfactory genetic gains. In addition, the genetic correlation between BW and KR ranged from low to moderate. Thus, selection over KR should have no effects on BW, showing that high body growth can be obtained without changes in efficiency.

Genetic correlation

Beef Cattle

10.1016/j.animal.2022.100528

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Citations (13)

Zootechnical indexes of heifers of the pantaneira breed.

Veterinária e Zootecnia (2014)

Marcos Paulo Gonçalves de Rezende Dirce Ferreira Luz Geovane Gonçalves Ramires Marcus Vinícius Morais de Oliveira

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Genetic parameters and trends of age at first calving in zebu breeds in northern and northeastern Brazil.

Livestock research for rural development (2018)

T. de L. Silva Wéverton José Lima Fonseca Marcus Rebouças Santos A. C. S. de Souza Marcos Paulo Gonçalves de Rezende

Zebu

Animal Breeding

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Genotype-environment interaction for productive traits of Holstein cows in Brazil described by reaction norms

Tropical Animal Health and Production (2020)

Jeferson Bello dos Santos Carlos Henrique Mendes Malhado Jaime Araújo Cobuci Marcos Paulo Gonçalves de Rezende Paulo Luíz Souza Carneiro

10.1007/s11250-020-02269-8

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Citations (7)

Morfologia corporal de equinos quarto de milha puros e mestiços utilizados no laço comprido no Mato Grosso do Sul

Archivos de Zootecnia (2015)

Marcos Paulo Gonçalves de Rezende U. G. P. de Abreu Júlio César de Souza Sandra Aparecida Santos Geovane Gonçalves Ramires

Analisou-se pelagens, índices morfométricos (IM) e conformação (IC) de 125 equinos adultos da raça Quarto de Milha (QM), distribuídos em puros (67 fêmeas e 26 machos) e mestiços (24 fêmeas e 8 machos) utilizados em provas de Laço Comprido no Mato Grosso do Sul, Brasil. Estudou-se variação das pelagens a partir da simples contagem das ocorrências do fenômeno. Para análise dos IM, mensuram-se 28 medidas lineares e com base nessas, calculou-se 12 IC. Utilizou-se o método dos quadrados mínimos, com modelo contendo como fontes de variação os efeitos de sexo, grupo genético (equino puro ou mestiço) e interação grupo genético*sexo e estimaram-se correlação de Pearson entre os IM com os IC. As pelagens de maior predominância entre os equinos foram à alazã (42,40 %) e castanha (22,40 %). Observaram-se nos IM e IC (p

10.21071/az.v64i246.395

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Citations (11)

Phenotypic traits of equines raised in the Pantanal of Mato Grosso do Sul

Semina Ciências Agrárias (2015)

Júlio César de Souza Marcos Paulo Gonçalves de Rezende Geovane Gonçalves Ramires Vanessa Terra Gonçalves Carolina Fregonesi de Souza

<p>The primary aim of this study was to characterize the phenotypes of equines raised in the Pantanal region of Mato Grosso do Sul, one of the central-western states of Brazil. Eighteen linear measurements were collected from 498 adult horses belonging to several different breeds, including Pantaneira (n = 52), Arabic (n = 28), Crioulo (n = 31), Mangalarga (n = 8), Quarter Horse (n = 97), Petiço (n = 9), Crossbred Horses (i.e., undetermined breeding; n = 170), and Mules (n = 74). These measurements were compared to similar measurements taken of English Thoroughbreds (n = 14) and Brazilian Equestrians (n = 15) in the city of Campo Grande, the capital of Mato Grasso do Sul. We used analysis of variance to test the influence of several factors, including genetic group, category (horse or mule), sex, and their interactive effects, on phenotypic characteristics. Correlation estimates verified the Euclidean distance between genetic groups categorized via cluster analysis. The effects were significant (P < 0.05) for many of the phenotypic characteristics. Horses showed higher values for most of the measurements compared to mules, except for the length of the head, lumbar back length, and cannon bone circumference, as well as greater correlation between weight and heart girth (r = 0.98). Cluster analysis determined that the animals were categorized into nine groups, with 10 distinct populations. Correspondence analysis showed that the Crioulo, Crossbred Horses, Mules, Pantaneiro, and Mangalarga breeds were less distinct phenotypically. The Petiço breed was not grouped, whereas Quarter Horses, English Thoroughbreds, and Brazilian Equestrians were more phenotypically distinct from the other breeds.</p>

Phenotypic trait

Equidae

Circumference

10.5433/1679-0359.2015v36n5p3341

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Citations (10)

Genotype-environment interaction for age at first calving in Holstein cows in Brazil

Veterinary and Animal Science (2020)

Jeferson Bello dos Santos Carlos Henrique Mendes Malhado Paulo Luíz Souza Carneiro Marcos Paulo Gonçalves de Rezende Jaime Araújo Cobuci

Dairy cattle production is distributed throughout the Brazilian regions. However, Brazilian producing regions are different in air temperature and humidity, diet, birth season, and other factors that may alter the reproductive performances of cows. The age of the cow at first calving (AFC) is a good indicator of sexual precocity since it shows the beginning of the female reproductive life and has a great influence on cow replacement costs. Researches on genotype-environment interaction (GEI) show the importance of using specific bulls for the different production systems in Brazil since most semen used in the country is imported. The objective of this work was to evaluate GEI for AFC in Holstein cows in Brazil, using reaction norms. The statistical models used were the standard animal model, which disregards the GEI, and hierarchical reaction norm models with homoscedastic (HRNMHO) and heteroscedastic (HRNMHE) residual variance, and one (HRNMHO1S and HRNMHE1S) and two (HRNMHO2S and HRNMHE2S) steps. HRNMHO1S presented better fit to the data, with lower heritability for environments with lower AFC, and higher heritability for environments with higher AFC. The GEI found was complex, with a reclassification of bulls, denoting the importance of considering GEI for evaluation and selection of bulls for different production levels. The reduction of AFC is possible when using breeding bulls adapted to the tropical and subtropical conditions of Brazil.

10.1016/j.vas.2020.100098

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Citations (5)

Genotype-environment interaction, genetic trends, and performance dissimilarity of Nellore herds raised in three different environmental gradients

Semina Ciências Agrárias (2018)

Júlio César de Souza Fabio Rafael Leão Fialho Marcos Paulo Gonçalves de Rezende C. H. C. Machado Mariana Pereira Alencar

The objectives of this work were to evaluate the genotype-environment interaction, and estimate genetic parameters, genetic trends, and performance dissimilarity-weight gain from birth to weaning (WGBW), adjusted weight to 205 days (W205), weight gain from weaning to 18 months of age (WG18), and adjusted weight to 550 days (W550)-in Nellore animals born between 1986 and 2012, and raised in pasture-based system in three different environmental gradients in Brazil. Data of 62,001 animals-11,729 raised in the Alto Taquari/Bolsão region (ATBR), 21,143 raised in the Campo Grande/Dourados region (CGDR) and 29,129 raised in the western São Paulo/Paraná region (SPPR) in Brazil-were used. The contemporary groups were defined by sex, location, and birth year and season, with at least nine individuals, two different environments, and breeding bulls with at least five progenies. The statistical model contained the direct additive and residual genetic effects (random effects), and environmental and contemporary group effects (fixed effects). Genetic parameters, genotype-environment interaction and genetic trends were estimates using animal model (uni- and/or bi- traits). The level of similarity between regions was evaluated using principal components. The animals raised in the CGDR had superior performance regarding the traits evaluated. The direct heritability estimates ranged from 0.39 to 0.44 (WGBW), 0.41 to 0.45 (W205), 0.42 to 0.55 (WG18) and 0.60 to 0.62 (W550). The maternal heritability of the traits ranged from 0.20 (WGBW), 0.12 to 0.18 (W205), 0.00 to 0.06 (WG18) and 0.02 to 0.22 (W550). According to the Spearman correlation, the ranking of the breeding bulls in the regions evaluated were different. The mean of Euclidean distance indicated low similarity between ATBR and CGDR (43.20), and ATBR and SPPR (29.24). CGDR and SPPR presented similarity of 17.84. The breed values increased over the years in the traits evaluated. The cumulative variance percentage of the first two main components explained 99.99% variation among the regions, and the weight gains of the animals were the most important to differentiate the regions. A genotype-environment interaction was found for the traits evaluated, thus, the breeding bull selected with superior genetic merit for one region might not be the best for others.

Environmental effect

Restricted maximum likelihood

Maternal effect

Additive genetic effects

10.5433/1679-0359.2018v39n1p349

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Citations (2)