Genetic parameter estimates for birth and weaning weights, pre-weaning daily weight gain and three type traits for Charolais beef cattle in Spain

VIABILIDADE FINANCEIRA DA IRRIGAÇÃO EM SORGO FORRAGEIRO EM SISTEMA DE ASPERSÃO PARA BOVINOCULTURA DE CORTE JARDEL HENRIQUE KIRCHNER1; ADROALDO DIAS ROBAINA2; MARCIA XAVIER PEITER3; ROGÉRIO RICALDE TORRES4; WELLINGTON MEZZOMO5 E BRUNA DALCIN PIMENTA 1 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Nelsi Ribas Fritsch, nº 1111, bairro Esperança, Ibirubá, RS, Brasil, CEP: 98200-000, [email protected] 2 Eng. Agrônomo, Doutor, Professor Titular do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected] 3 Eng. Agrônoma, Doutora, Professora Associada do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected] 4 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Eng. João Viterbo de Oliveira, nº 3061, Zona Rural, Vacaria, RS, Brasil, CEP: 95219-899, [email protected] 5 Eng. Agrônomo, Mestre, Doutorando no Programa de Pós-Graduação em Engenharia Agrícola, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected] 6 Eng. Agrônoma, Mestra, Doutoranda no Programa de Pós-Graduação em Engenharia Agrícola, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected] 1 RESUMO A bovinocultura de corte mantida em pasto de sorgo forrageiro caracteriza-se como um dos principais meios de produção bovina no Rio Grande do Sul. Contudo, há irregularidade das precipitações e os produtores utilizam a irrigação como alternativa para o problema. Porém, há uma necessidade de determinação dos custos de produção e da viabilidade financeira da atividade. O trabalho objetivou avaliar a viabilidade financeira da irrigação em sorgo forrageiro para a bovinocultura de corte para diferentes expectativas de ganho de peso médio diário dos animais. Conduziu-se dois experimentos em 2015/2016 e 2016/2017 em Santa Maria/RS, e avaliou-se as produtividades de seis lâminas de irrigação por aspersão convencional (0, 25, 50, 75, 100 e 125 % da ETo), em quatro repetições, delineamento blocos ao acaso. Com as produtividades, gerou-se funções de produção e determinou-se a carga animal possível de ser alimentada para cada tratamento. Simulou-se três cenários de ganho de peso diário por animal (0,5, 1 e 1,5 kg-1animal-1 dia-1), e os custos de produção para cada condição hídrica estabelecida, além do retorno financeiro para cada cenário testado. Verificou-se viabilidade financeira para a maioria das situações simuladas avaliadas e que os custos dependem do regime das precipitações. Palavras chave: Sorghum bicolor L. (Moench), irrigação de pastagem, viabilidade financeira, custos de produção. KIRCHNER, J. H.; ROBAINA, A. D.; PEITER, M. X.; TORRES, R. R.; MEZZOMO, W.; PIMENTA, B. D. FINANCIAL FEASIBILITY OF IRRIGATION IN FORAGE SORGHUM IN ASPERSION SYSTEM FOR MEAT CATTLE BREEDING 2 ABSTRACT Beef cattle kept in pasture of forage sorghum is characterized as one of the main means of bovine production in Rio Grande do Sul. However, rains are irregulat and producers use irrigation as alternative to the problem. However, there is a need to determine production costs and financial viability of the activity. The objective of this work was to evaluate the financial feasibility of irrigation in forage sorghum for beef cattle for different expectations of average daily weight gain of the animals. Two experiments were conducted in 2015/2016 and 2016/2017 in Santa Maria / RS, and the yields of six conventional irrigation depths (0, 25, 50, 75, 100 and 125% of the ETo) were evaluated, in four replications, and randomized block design. With the productivities, production functions were generated and the possible animal load to be fed for each treatment was determined. Three scenarios were simulated of daily weight gain per animal (0.5, 1 and 1.5 kg-1animal-1day-1), and the production costs for each established water condition, in addition to the financial return for each scenario tested. Financial feasibility has been verified for most of the simulated situations evaluated and costs depend on the precipitation regime. Keywords: Sorghum bicolor L. (Moench), forage irrigation, financial viability, production costs.

Download Full-text

Genetic aspects of growth and maturing rate in trypanotolerant beef cattle: N'Dama

Nigerian Journal of Animal Production ◽

10.51791/njap.v30i2.1461 ◽

2021 ◽

Vol 30 (2) ◽

pp. 149-156

Author(s):

O. O Mgbere ◽

O. Olutogun

Keyword(s):

Growth Rate ◽

Beef Cattle ◽

Growth Traits ◽

Physiological Stress ◽

Genetic Parameter ◽

High Standard ◽

Parameter Estimates ◽

Production Environment ◽

Genetic Progress ◽

Animal Management

Genetic parameters for Absolute Growth Rate (AGR), Relative Growth Rate (RGR) and Absolute Maturing Rate (AMR) at various age interval from birth to maturity in N 'Dama beef cattle raised in the humid Tropics of Nigeria were estimated. Performance data used were accumulated between 1948 and 1964 at Fasola cattle ranch in Oyo, Nigeria and the number of records analysed ranged from 44 to 678. prewering (B - W) growth and maturing rates in N’Dama calves were 0.377 ± 0.009 kg/day (AGR), 0.643 ± 0.006 %/day (RGR) and 0.120 ± 0.003% A/day (AMR) and fluctuated subsequently, following the animals' state of development and certain physiological stress conditions. At post weaning (W-12), these rates decreased to 0.249 ± 0.049 kg/day, 0.204 ± 0.029 %/day and 0.075 ± 0.014 % A/day for AGR, RGR and AMR respectively. Estimates of heritability at the various age intervals were considered low in these growth traits with values obtained ranging from 0.03 to 0.24 for AGR, 0.03 to 0.21 for RGR and 0.02 to 0.42 for AMR, with high standard errors. The low estimates though, consistent with literature reports were attributed to the poor standard of animal management and production environment at Fasola. It was evident from this study that selection of N'Dama calves based on post weaning (W-12) growth or maturing rates would yield substantial genetic progress. However, improved animal management and production environment on the ranch would not only improve precision of the genetic parameter estimates but would also enhance N 'Dama growth performance generally.

Download Full-text

PSIII-8 Genetic Parameter Estimates for Bull Prolificacy and Its Relationship with Scrotal Circumference in a Commercial Beef Cattle Population

Journal of Animal Science ◽

10.1093/jas/skab054.271 ◽

2021 ◽

Vol 99 (Supplement_1) ◽

pp. 158-159

Author(s):

Chad A Russell ◽

E J Pollak ◽

Matthew L Spangler

Keyword(s):

Beef Cattle ◽

Breeding Season ◽

Random Effects ◽

Fixed Effects ◽

Genetic Parameter ◽

Additive Genetic Effect ◽

Parameter Estimates ◽

Contemporary Group ◽

Scrotal Circumference ◽

Heritability Estimates

Abstract The commercial beef cattle industry relies heavily on the use of natural service sires. Either due to the size of breeding herds or to safe-guard against injury during the breeding season, multiple-sire breeding pastures are utilized. Although each bull might be given an equal opportunity to produce offspring, evidence suggest that there is substantial variation in the number of calves sired by each bull in a breeding pasture. DNA-based paternity assignment enables correct assignment of calves to their respective sires in multi-sire pastures and presents an opportunity to investigate the degree to which this trait complex is under genetic control. Field data from a large commercial ranch were used to estimate genetic parameters for calf count (CC; n=623) and yearling scrotal circumference (SC; n=1962) using univariate and bivariate animal models. Average CC and SC were 12.1±11.1 calves and 35.4±2.30 cm, respectively. Average number breeding seasons per bull and bulls per contemporary group were 1.40 and 24.9, respectively. The model for CC included fixed effects of age during the breeding season (in years) and contemporary group (concatenation of breeding pasture and year). Random effects included additive genetic and permanent environmental effects, and a residual. The model for SC included fixed effects of age (in days) and contemporary group (concatenation of month and year of measurement). Random effects included an additive genetic effect and a residual. Univariate model heritability estimates for CC and SC were 0.237±0.156 and 0.456±0.072, respectively. Similarly, the bivariate model resulted in heritability estimates for CC and SC of 0.240±0.155 and 0.461±0.072, respectively. Repeatability estimates for CC from univariate and bivariate models were 0.517±0.054 and 0.518±0.053, respectively. The estimate of genetic correlation between CC and SC was 0.270±0.220. Parameter estimates suggest that both CC and SC would respond favorably to selection and that CC is moderately repeatable.

Download Full-text

Genetic parameter estimates for serum insulin-like growth factor-I concentration and carcass traits in Angus beef cattle.

Journal of Animal Science ◽

10.2527/2000.7892305x ◽

2000 ◽

Vol 78 (9) ◽

pp. 2305 ◽

Cited By ~ 33

Author(s):

M E Davis ◽

R C Simmen

Keyword(s):

Growth Factor ◽

Beef Cattle ◽

Serum Insulin ◽

Genetic Parameter ◽

Carcass Traits ◽

Parameter Estimates ◽

Insulin Like Growth Factor ◽

Factor I ◽

Growth Factor I

Download Full-text

Genetic Parameter Estimates for Preweaning Traits of Beef Cattle in a Stressful Environment

Journal of Animal Science ◽

10.2527/jas1988.6681899x ◽

1988 ◽

Vol 66 (8) ◽

pp. 1899 ◽

Cited By ~ 9

Author(s):

S. K. DeNise ◽

M. Torabi ◽

D. E. Ray ◽

R. Rice

Keyword(s):

Beef Cattle ◽

Genetic Parameter ◽

Parameter Estimates ◽

Stressful Environment

Download Full-text

Genetic parameter estimates for serum insulin-like growth factor I concentrations, and body weight and weight gains in Angus beef cattle divergently selected for serum insulin-like growth factor I concentration1,2,3

Journal of Animal Science ◽

10.2527/jas.2005-567 ◽

2006 ◽

Vol 84 (9) ◽

pp. 2299-2308 ◽

Cited By ~ 41

Author(s):

M. E. Davis ◽

R. C. M. Simmen

Keyword(s):

Body Weight ◽

Growth Factor ◽

Beef Cattle ◽

Serum Insulin ◽

Genetic Parameter ◽

Parameter Estimates ◽

Insulin Like Growth Factor ◽

Factor I ◽

Weight Gains ◽

Growth Factor I

Download Full-text

Random-effect meta-analysis of genetic parameter estimates for carcass and meat quality traits in beef cattle

Tropical Animal Health and Production ◽

10.1007/s11250-021-02862-5 ◽

2021 ◽

Vol 53 (4) ◽

Author(s):

Giovanni Coelho Ladeira ◽

José Teodoro de Paiva ◽

Hinayah Rojas de Oliveira ◽

Eula Regina Carrara ◽

Fabrício Pilonetto ◽

...

Keyword(s):

Beef Cattle ◽

Meat Quality ◽

Meta Analysis ◽

Genetic Parameter ◽

Random Effect ◽

Parameter Estimates ◽

Quality Traits ◽

Meat Quality Traits

Download Full-text

Relationship among productive and economic variables of beef cattle in Brazil

Ciência Rural ◽

10.1590/0103-8478cr20190841 ◽

2021 ◽

Vol 51 (4) ◽

Author(s):

Rogério Semchechem ◽

Simone Fernanda Nedel Pértile ◽

Sandra Maria Simonelli ◽

Maria Eugênia Andrighetto Canozzi ◽

Luiz Fernando Coelho da Cunha Filho ◽

...

Keyword(s):

Weight Gain ◽

Beef Cattle ◽

Average Daily Gain ◽

Daily Weight Gain ◽

Average Weight ◽

Stocking Rate ◽

Linear Effect ◽

Independent Variables ◽

Average Weight Gain ◽

Positive Effect

ABSTRACT: The present study aimed to obtain, through statistical methods, the independent variables that influence the economic and productive results of Brazilian beef cattle. Economic and productive information was collected from 106 farms in Brazil. Data collection was performed by the Instituto de Métricas Agropecuárias (Inttegra). The variable selection method used was stepwise regression followed by polynomial regression analyses. The variable beef cattle economic result showed the positive effect of disbursement per head per month and average weight gain. An average daily gain of 520 g in live weight was obtained, and this variable was influenced especially by nutrition cost. The arroba production (arroba is a unit of weight corresponding to 15kg) was influenced by the linear effect of nutrition cost and stocking rate. The variable arroba production in pasture showed a linear and positive effect of average weight gain in pasture and stocking rate in pasture. For profit per arroba, the variables nutrition cost, disbursement with pasture, and average sale price had a linear effect. The independent variables that had the greatest influence on the response variables were stocking rate, average daily weight gain, and nutrition cost. Thus, increases in investment in nutrition and stocking rate should result in higher production rates and improvements in the profitability of this activity.

Download Full-text

Performance and carcass characteristics of beef cattle fed with ammoniated marandugrass hay

Revista Brasileira de Zootecnia ◽

10.1590/s1516-35982009000900030 ◽

2009 ◽

Vol 38 (9) ◽

pp. 1847-1855

Author(s):

Marcella de Toledo Piza Roth ◽

Flávio Dutra de Resende ◽

Ricardo Andrade Reis ◽

Gustavo Rezende Siqueira ◽

Marcelo Henrique de Faria ◽

...

Keyword(s):

Body Weight ◽

Weight Gain ◽

Beef Cattle ◽

Daily Weight Gain ◽

Initial Body Weight ◽

Protein Nitrogen ◽

Anhydrous Ammonia ◽

Seed Harvest ◽

Fat Thickness ◽

Red Angus

This trial was conducted aiming to evaluate the effects of Brachiaria brizantha vegetative seed harvest residues hay treated with anhydrous ammonia (NH3) or urea, and protein sources on the steers performance, and carcass quality. Twenty-four male beef cattle were (12 F1 Nellore X Aberdeen Angus and 12 F1 Nellore X Red Angus), distributed in four treatments, with six replications. Animal crossbreed type and initial body weight were considered blocks. The diets were: Untreated hay supplemented with non-protein nitrogen (UHNPN); untreated hay supplemented with cottonseed meal (UHCM), hay treated with 5% urea (HTU), hay treated with 3% anhydrous ammonia (HTA) of DM%. Diets were formulated to be isoproteic and isoenergetic. The initial body weight (kg), daily DM intake (kg), and percentage of body weight (% BW) did not differ among treatments, and the average values observed were 422.6 kg, 10.24 kg, and 2.16% BW, respectively. Animals fed with HTA showed better daily weight gain, feed efficiency, 1.336 kg/day, and 7.78 kg/kg of weight gain, followed by the UHCM, 1.161 kg/day, and 8.98 kg/kg, respectively. Animals of the HTA showed highest NDF, ADF and cellulose intake. Carcass fat thickness was highest on the HTA animals, 6.3 mm.

Download Full-text