Aspectos produtivos da raça Pardo-Suíça no Brasil: Fatores de ajustamento, produção de leite e de gordura, e parâmetros genéticos

Rennó, Francisco Palma; Pereira, José Carlos; Araújo, Cláudio Vieira de; Torres, Robledo de Almeida; Rodrigues, Marcelo Teixeira; Rennó, Luciana Navajás; Oliveira, Rita Flávia Miranda de; Kaiser, Fernando da Rocha

doi:10.1590/s1516-35982002000800020

Cited by 4 publications

(3 citation statements)

References 14 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Araújo et al (2002), trabalhando com 6.842 lactações de 3.274 vacas da raça Pardo-Suíça, distribuídas em 100 rebanhos e Rennó et al (2002), com 11.189 lactações de 5.382 vacas da mesma raça, distribuídas em 201 rebanhos, encontraram médias de produção de leite e desviospadrão de 5.941,43 ± 1.661,66 kg e 5.791,50 ± 1.211,58 kg e, para a produção de gordura, 221,28 ± 61,13 kg e 217,25 ± 47,36 kg, respectivamente.…”

Section: Resultsunclassified

Efeito da interação reprodutor x rebanho sobre as produções de leite e de gordura na raça Pardo-Suíça

Sirol

Euclydes²,

Torres³

et al. 2005

R. Bras. Zootec.

Self Cite

View full text Add to dashboard Cite

RESUMO -Dados de 4.959 lactações de 2.414 vacas da raça Pardo-Suíça, filhas de 70 reprodutores, distribuídos em 51 rebanhos, foram utilizados para se estimar o componente de variância para a interação reprodutor x rebanho das produções de leite e de gordura e verificar o efeito desta interação sobre a avaliação genética dos reprodutores, por meio de modelos que diferiam na presença e ausência do termo de interação. As produções de leite e de gordura foram ajustadas para duas ordenhas diárias, 305 dias de lactação e idade adulta da vaca. O teste da razão de verossimilhança foi utilizado na verificação da efetividade da inclusão da interação no modelo. As médias das produções de leite e de gordura foram 6085,79 ± 1629,73 kg e 225,61 ± 60,44 kg, respectivamente. A proporção da variância total decorrente da interação reprodutor x rebanho foi 0,4%, para a produção de leite, e 1%, para a produção de gordura. A estimativa de herdabilidade foi 0,38, para a produção de leite, utilizando-se ambos os modelos, e reduziu de 0,40 para 0,39, para a produção de gordura, quando o modelo com interação foi considerado. A função de verossimilhança aumentou significativamente com a inclusão da interação no modelo. A correlação de Spearman foi próxima de um para ambas as características, quando todos os reprodutores foram considerados. Houve redução de 1% na estimativa de acurácia dos valores genéticos preditos para ambas as características, porém, a correlação de Pearson estimada entre as acurácias obtidas para cada modelo estudado foi próxima à unidade. A interaçãoreprodutor x rebanho não afetou as estimativas de componentes de variâncias genética e residual e a ordem de classificação dos reprodutores para ambas as características.Palavras-chave: acurácia, avaliação genética, bovinos leiteiros, componentes de variância, correlação genética, interação genótipo x ambiente Effects of Sire x Herd Interaction on Milk and Fat Yields in Brown-Swiss HerdsABSTRACT -Data comprising 4,959 lactations of 2,414 Brown-Swiss cows, daughters of 70 sires, from 51 herds, were used to estimate the variance component for sire x herd interaction on milk and fat yields and to verify the effect of this interaction on sire genetic evaluation, using the models that differed in the presence or not of the interaction term. The milk and fat yields were adjusted for two milkings, 305 days of lactation and age cow. Likelihood ratio test was used to verify the effectiveness of including a sire x herd interaction effect in the model. Averages for milk and fat yields were 6085.79 ± 1629.73 kg and 225.61 ± 60.44 kg, respectively. The proportion of the phenotypic variance due to sire x herd interaction was 0.4% for milk yield and 1% for fat yield. The heritability estimate was 0.38 to milk yield, using both models, and decreased from 0.40 to 0.39 for fat yield, when the model with interaction effect was considered. The likelihood function increased significantly with the inclusion of interaction in the model. The Spearman correlation was close to one for both traits,...

show abstract

Section: Resultsunclassified

Efeito da interação reprodutor x rebanho sobre as produções de leite e de gordura na raça Pardo-Suíça

Sirol

Euclydes²,

Torres³

et al. 2005

R. Bras. Zootec.

Self Cite

View full text Add to dashboard Cite

show abstract

“…To Rennó et al (2002), there are other factors influencing milk production such as season, herd, and milking, age and lactation period. The period between birth and cow drying is called lactation period (LP), with average duration of 305 days; thus the animal has a dry period of about 60 days and has one delivery per year .…”

Section: Introductionmentioning

confidence: 99%

“…Knowledge of the productive potential of each breed and each crossing used in climate conditions in Brazil should be studied in order to have security when indicating a particular animal for the various production systems (Rennó et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Influence of lactation stage, delivery order of calving and genetic group on milk quality

Carmo¹,

Silva²,

Pereira³

et al. 2015

Afr. J. Agric. Res.

View full text Add to dashboard Cite

Milk production and quality are influenced by environmental factors such as nutrition, genetic factors such as breed and physiological. The aim of the present study was to evaluate the influence of lactation stage, delivery order and genetic group on the quality of milk from crossbred cows 3/4 Gyr, 7/8 Gyr and 15/16 Gyr. Fresh milk samples were collected from crossbred cows. Fat, protein, lactose, non fat dry extract (NDE) and somatic cell count (SCC) of milk according to lactation stage, delivery order of calving and genetic groups were evaluated. The experimental design was completely randomized. Tukey test at 5% probability was used. Animals at the final third of lactation (201 to 305 days) showed higher fat, protein, NDE and SCC levels when compared to animals of other lactation stages. First delivery animals produced milk with higher content of solids compared to animals with 2 deliveries and above three deliveries. First calving the animals produced milk with higher solids content compared to animals with two calving and above three calving. Fat, protein and NDE results of fresh milk were consistent with limits established by the Brazilian legislation for milk quality, regardless of lactation stage, delivery order of calving and genetic group. Milk SCC was higher in cows in advanced lactation stage, The results were however below limits required by law. 3/4 crossbred Gyr cows showed higher SCC, with average values above limit established by current legislation.

show abstract

Altınova Tarım İşletmesinde Yetiştirilen Esmer Sığırların Süt ve Döl Verim Özellikleri

Sultan;KAYGISIZ¹

2007

Tarım Bilimleri Dergisi

View full text Add to dashboard Cite

Öz : Bu araştırma, Altınova Tarım İşletmesinde yetiştirilen Esmer sığırların süt ve döl verim özelliklerini belirlemek amacıyla yapılmıştır. Araştırmanın materyalini, 1984Araştırmanın materyalini, -1997 Milk Yield and Reproductive Traits in Brown Swiss Cattle Raised at Altınova State FarmAbstract : The purpose of this study was to investigate the milk yield and reproductive traits of Brown Swiss cattle raised at Altınova State Farm. Milk yield and reproductive traits data used in this study had been collected within a period of 14 years from 1984 through 1997. A total of 1058 lactation records from 324 cows were analysed within the research period. The least squares means for 305 daily milk yield, lactation period and dry period were found as 5340±91 kg, 302±4 days and 82.1±3.2 days, respectively. From the factors which their effects were investigated, effect of years on the 305 days milk yield were found to be highly significant (P<0.01), on the lactation period found to be significant (P<0.05), on the dry period found to be insignificant. The effect of parity on the 305 days milk yield and lactation length were found to be highly significant (P<0.01). The least squares means for age of the heifers at first breeding, age at first calving, calving interval and service period were 614.9±8.8 days, 904.8±39.4 days, 383.1±4.7 and 99.5±5.0 days respectively. The effect of calving years on age of the heifers at first breeding had highly significant (P<0.01).

show abstract

Aspectos produtivos da raça Pardo-Suíça no Brasil: Fatores de ajustamento, produção de leite e de gordura, e parâmetros genéticos

Cited by 4 publications

References 14 publications

Efeito da interação reprodutor x rebanho sobre as produções de leite e de gordura na raça Pardo-Suíça

Efeito da interação reprodutor x rebanho sobre as produções de leite e de gordura na raça Pardo-Suíça

Influence of lactation stage, delivery order of calving and genetic group on milk quality

Altınova Tarım İşletmesinde Yetiştirilen Esmer Sığırların Süt ve Döl Verim Özellikleri

Contact Info

Product

Resources

About