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Search Results: 1 - 10 of 32737 matches for " Daniel;Moletta "
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Desempenho em confinamento de machos bovinos inteiros Canchim, Aberdeen angus e cruzamentos recíprocos
Perotto, Daniel;Moletta, José Luiz;Lesskiu, Carlos;
Ciência Rural , 2002, DOI: 10.1590/S0103-84782002000400020
Abstract: daily dry matter intake (cms), feed conversion (ca) and average daily gain (adg) of 118 canchim (cn), aberdeen angus (ab) and reciprocal crossbred (cnab and abcn) males were analyzed. the cnab group included f1, 3/4cn+1/4ab, 5/8cn+3/8ab and 11/16cn+5/16ab. the abcn included f1, 5/8ab+3/8cn and 11/16ab+5/16cn. these animals were fed in individual stalls for 84 to 95 days receiving corn silage ad libitum plus a concentrate containing 17.8% cp and 79% tdn fed 1% of live animal weight per day. the traits were first analyzed by a model that included the fixed effects of year, genetic group, period and year x period interaction and the random effect of animal within genetic group within year. the ratio between the dry matter of the concentrate to the dry matter of the silage was included as a continuous variable in the model. later, the traits were analyzed by a multiple regression model that included coefficients for the expected fractions of ab in the genotypes of animals and dams and for expected individual and maternal heterozygosities. means for cms, ca and adg were, respectively, 2.44kg of dm/100kg of live weight/day, 6.97kg of dm/kg of adg and 1.435kg/day. genetic group influenced cms (p<0.01) and adg (p<0.06). the ab was equal to abcn, showing higher cms and lower adg than the other two groups. there was no heterosis for any of the traits indicating that rotational crossing between canchim and aberdeen angus was equal to the average of the parental breeds.
Desempenho em confinamento de machos bovinos inteiros Canchim, Aberdeen angus e cruzamentos recíprocos
Perotto Daniel,Moletta José Luiz,Lesskiu Carlos
Ciência Rural , 2002,
Abstract: Foram analisados o consumo diário de matéria seca (MS) por 100kg de peso vivo (CMS), a convers o alimentar (CA) e o ganho de peso médio diário (GMD) de 118 machos bovinos inteiros Canchim (Cn), Aberdeen Angus (Ab) e cruzamentos recíprocos (CnAb (F1, 3/4Cn+1/4Ab, 5/8Cn+3/8Ab e 11/16Cn+5/16Ab) e AbCn (F1, 5/8Ab+3/8Cn e 11/16Ab+5/16Cn)). Esses animais foram alimentados em baias individuais por 84 a 95 dias com silagem de milho à vontade mais concentrado (17,8% de PB e 79% de NDT) fornecido à base de 1% do peso vivo do animal por dia. As características foram analisadas por um modelo que incluiu os efeitos fixos de ano do confinamento, grupo genético, período e ano x período e o efeito aleatório de animal dentro de grupo genético dentro de ano. A rela o MS do concentrado:MS da silagem foi incluída como co-variável no modelo. Posteriormente, as características foram analisadas por um modelo de regress o que incluiu coeficientes representando as fra es esperadas de Ab nos genótipos dos animais e das m es e as heterozigoses individual e materna. As médias para CMS, CA e GMD foram 2,44kg de MS/100kg de PV/dia, 6,97kg de MS/kg de GMD e 1,435kg/dia, respectivamente. O grupo genético influenciou o CMS (P<0,01) e o GMD (P<0,06). O Ab igualou-se ao AbCn apresentando maior CMS e menor GMD que o Cn e o CnAb. N o houve heterose para qualquer das características indicando que o cruzamento alternado Cn x Ab seria igual à média das ra as paternas.
Características da carca?a de bovinos Canchim e Aberdeen Angus e de seus cruzamentos recíprocos terminados em confinamento
Perotto, Daniel;Moletta, José Luiz;Cubas, Antonio Carlos;
Ciência Rural , 1999, DOI: 10.1590/S0103-84781999000200024
Abstract: fourteen quantitative carcass traits of 137 canchim; 5/8 charolais + 3/8 zebu, (ca), aberdeen angus (ab), 3/4ca+1/4ab, 3/4ab+1/4ca, 5/8ca+3/8ab and 5/8ab+3/8ca, born at est. exp. fazenda modelo, in ponta grossa-pr, brazil, from 1988 to 1993, were analyzed. averages for age at beginning of confinement, initial weight, length of confinement period, final age and final weight were, respectively, 737 days, 356kg, 97 days, 834 days and 468kg. during the confinement period the animals were fed corn silage ad libitum plus a concentrate ration (79% tdn, 17,8% cp) offered on the basis of 1% of animal live weight per day. the results showed that ca and ab differed with respect to all traits, except side cut percentage. ca was superior to ab for hot carcass weight (pcq), dressing percentage (rcq), area of eye muscle (aol), conformation score, percentage of lean tissue (pem), weight of eatable portion (ppc) and hot carcass weight per day of life at slaughter (pcq/ddv). ab animals had thicker fat cover over rib eye (egc) and higher percentages of fat and of bones in the carcass than ca animals. there was heterotic response for pcq, rcq, aol, ppc and pcq/ddv. the two advanced crisscross ca x ab generations performed better than parental average for pcq, rcq, aol, ppc and pcq/ddv. performance of a rotational ca x ab crossbreeding system would be superior to that of any of the paternal breeds.
Heterose sobre os pesos de bovinos Canchim e Aberdeen Angus e de seus cruzamentos recíprocos
PEROTTO, DANIEL;CUBAS, ANTONIO CARLOS;MOLETTA, JOSé LUIZ;LESSKIU, CARLOS;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000001200022
Abstract: the study was conducted to estimate heterosis upon birth weight (pnt), weaning weight (p210), yearling weight (p365) and daily weight gain from birth to weaning (g210) and from weaning to one year of age (g365) in the first, second, third and fourth generations of a rotational crossbreeding system between canchim (c) and aberdeen angus (a). data from 1,147 calves born from 1981 to 1998 were analyzed by least squares procedures fitting a linear model that included the linear and the quadratic effects of age of the dam of the calf plus the fixed effects of sex, genetic group, month and year of birth of calf. estimates of heterosis and of other genetic differences were obtained by linear contrasts of appropriate means and tested by the t test. the contrast ca was positive and significant (p<0.001) for all five traits. the contrast f1caf1ac was negative and highly significant (p<0.001) for p210 and for g210 and significant (p<0.05) for p365. the f1 generation exhibited heterosis of 4.8% for p210 and of 4.9% for g210. maternal heterosis was 3.7%, 5.8%, 6.3% and 20.4%, respectively, for p210, g210, p365 and g365. the heterosis estimated for the mean of the third and fourth generations of the rotational crossbreeding system between c and a was 4.6% for p210, 5.3% for g210 and 3.5% for p365.
Características quantitativas da carca?a de bovinos Charolês, Caracu e cruzamentos recíprocos terminados em confinamento
Perotto, Daniel;Moletta, José Luiz;Cubas, Antonio Carlos;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000100016
Abstract: abstract - twelve quantitative carcass traits of 162 charolais (ch), caracu (ca), 3/4ca+1/4ch, 3/4ch+1/4ca, 5/8ca+3/8ch and 5/8ch+3/8ca, born from 1988 to 1993, were analyzed. averages for age at the beginning of the confinement period, initial weight, length of confinement period, final age and final weight were, respectively, 712 days, 362 kg, 99 days, 811 days and 489 kg. during the confinement period, the animals were fed corn silage ad libitum and a concentrate diet (79% tdn, 17,8% cp) offered on the basis of 1% lw/animal?day. the results showed that the groups ch and ca did not differ with respect to hot carcass weight (pcq), dressing percentage (rcq), side cut percentage (pec), fat percentage (peg) and weight of edible portion (pcc). charolais animals were superior to ca animals for longissimus dorsi area (aml), conformation score and for the percentages of saw cut (pes) and lean tissue (pem). caracu animals showed higher fat thickness (egc), and higher percentages of forequarter (ped) and bones (peo) than those of the ch group. there was heterotic response for pcq, aml, conformation score, pcc and ped. the averages of the two-advanced crisscross ch x ca generations were higher than the parental averages for pcq, aml, conformation score, pcc and ped. rotational crossbreeding of charolais and caracu produces animals with superior carcass characteristics than the purebred charolais and caracu.
Características quantitativas da carca a de bovinos Charolês, Caracu e cruzamentos recíprocos terminados em confinamento
Perotto Daniel,Moletta José Luiz,Cubas Antonio Carlos
Revista Brasileira de Zootecnia , 2000,
Abstract: RESUMO - Foram analisadas doze características quantitativas das carca as de 162 machos bovinos inteiros pertencentes aos grupos Caracu (Ca), Charolês (Ch), 3/4Ca+1/4Ch, 3/4Ch+1/4Ca, 5/8Ca+3/8Ch e 5/8Ch+3/8Ca, nascidos no período de 1988 a 1993. As médias para idade e peso ao início do período de confinamento, dura o do confinamento, idade e peso ao abate foram, respectivamente, 712 dias, 362 kg, 99 dias, 811 dias e 489 kg. Durante o confinamento, os animais receberam silagem de milho à vontade e uma ra o concentrada (79% NDT, 17,8% PB) fornecida à base de 1% PV/animal/dia. Os resultados mostraram que os grupos Ch e Ca n o diferiram quanto ao peso de carca a quente, ao rendimento de carca a quente, às porcentagens de costilhar e gordura e ao peso da por o comestível da carca a (PCC). O Ch superou o Ca para a área da se o transversal do músculo Longissimus dorsi (AML), o escore de conforma o da carca a (CONF) e as porcentagens de serrote e músculos. Animais Ca apresentaram maior espessura de gordura de cobertura e maiores porcentagens de dianteiro (PED) e ossos que os do grupo Ch. Houve resposta heterótica para PCQ, AML, CONF, PCC e PED. As duas gera es avan adas de cruzamentos alternados Ch x Ca foram superiores à média das ra as paternas para PCQ, AML, CONF, PCC e PED. O cruzamento alternado Ch x Ca produz animais com características de carca a superiores às dos Charolês e Caracu puros.
Heterose sobre os pesos de bovinos Canchim e Aberdeen Angus e de seus cruzamentos recíprocos
PEROTTO DANIEL,CUBAS ANTONIO CARLOS,MOLETTA JOSé LUIZ,LESSKIU CARLOS
Pesquisa Agropecuária Brasileira , 2000,
Abstract: O trabalho foi conduzido para estimar a heterose sobre os pesos ao nascimento (PNT), à desmama (P210) e ao ano (P365) e sobre os ganhos de pesos médios diários do nascimento à desmama (G210) e da desmama ao ano (G365) nas quatro primeiras gera es do sistema de cruzamentos alternados entre as ra as Canchim (C) e Aberdeen Angus (A). Os dados de 1.147 bezerros nascidos de 1981 a 1998 foram analisados pelo método dos mínimos quadrados, ajustando-se um modelo linear que incluiu os efeitos linear e quadrático da idade da m e do bezerro e os efeitos fixos de sexo, grupo genético, mês e ano de nascimento do bezerro. Estimativas de heterose e de outras diferen as genéticas foram estimadas por contrastes entre médias e testadas pelo teste t. O contraste "CA" foi positivo e significativo (P<0,001) para as cinco características. O contraste F1CAF1AC teve sinal negativo e foi altamente significativo (P<0,001) para P210 e G210 e significativo (P<0,05) para P365. A gera o F1 exibiu heterose de 4,8% para P210 e de 4,9% para G210. A heterose materna foi de 3,7%, 5,8%, 6,3% e 20,4%, respectivamente, para P210, G210, P365 e G365. A heterose média das terceira e quarta gera es do cruzamento alternado entre C e A foi de 4,6% para P210, 5,3% para G210 e de 3,5% para P365.
Características de carca?as e da carne de tourinhos submetidos a dietas com diferentes níveis de substitui??o do milho por resíduo úmido da extra??o da fécula de mandioca
Abrah?o, José Jorge dos Santos;Prado, Ivanor Nunes do;Perotto, Daniel;Moletta, José Luiz;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000500026
Abstract: this trial was conducted to study the effects of replacing corn with increasing levels of cassava starch by-products on carcass and meat characteritics for fedlot young bulls. percentages of substitution were 0, 25, 50, 75, and 100, in dry matter basis. forty crossbred bulls (? and ? bos taurus x bos índicus), averaging 21 months old and 363 kg of initial body weight and 570 kg of final body weight were assigned to a block design with eight replicates by treatment. no effect of treatment on carcass traits was detected. the averages were as follows: carcass yield, 54.79%; conformation, 12.32 (good +); carcass length, 132.5 cm; cushion thickness, 28.12 cm; ribeye area, 79.25 cm2; porcentages of bone, 15.51%, of muscle, 64.12%, and of fat, 20.85%; muscle + fat/bone relation , 5.52; edible portion percentage, 85.07%; fat thickness, 4.02 mm; and marbling, 3.9 (light -). no effect of treatment on chemical composition of meat was detected, with averages of 1.01; 19.16 and 2.24%, respectively, for ash, protein, and fat. there was significant difference for humidity, with higher percentage for 50% replacement diet (74.67%) and lower for 25% replacement diet (72.89%). the other treatments had intermediate values. no treatment effects were observed and mean values for the studied traits indicate that the obtained carcasses fulfill the expected requirements of market.
Consumo e convers?o alimentar de machos bovinos inteiros Charolês, Caracu e cruzamentos recíprocos em confinamento
Perotto, Daniel;Moletta, José Luiz;Oliveira, Jo?o Everaldo Prestes de;Lesskiu, Carlos;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000100015
Abstract: abstract - daily dry matter intake (cpupv), feed:gain ratio (conv) and average daily gain (adg) of 80 charolais (ch), caracu (ca) and reciprocal crossbred (chca and cach) males were analyzed. the chca and cach were generated by rotational ch x ca crossbreeding. all animals were fed in individual stalls for 76 to 97 day periods receiving corn silage ad libitum and a concentrate containing 17.8% cp and 79% tdn fed 1% lw/animal?day. the three traits were analyzed first as a function of period, when the total period was divided into three sub-periods, and, later, in the total period. general means for cpupv, conv and adg were, respectively, 2.25 kg dm/100 kg lw/day, 6.75 kg dm/kg adg and 1.587 kg/day. in the analysis by period, the genetic group (gpo) influenced all traits, except for conv. gpo x period interaction was not significant for any of the three traits. the charolais was better than the ca for conv (-0.861 kg of dm was /kg of adg) and for adg (0.163 kg/day). the difference (chca - cach) was significant for the three traits, and the chca was better than its reciprocal. the effect of heterosis was significant for adg only. rotational ch x ca crossbreeding was equal to charolais and superior than caracu.
Consumo e convers o alimentar de machos bovinos inteiros Charolês, Caracu e cruzamentos recíprocos em confinamento
Perotto Daniel,Moletta José Luiz,Oliveira Jo?o Everaldo Prestes de,Lesskiu Carlos
Revista Brasileira de Zootecnia , 2000,
Abstract: RESUMO - O consumo diário de matéria seca (CPUPV), a convers o alimentar (CONV) e o ganho de peso médio diário (GMD) de 80 machos bovinos inteiros Charolês (Ch), Caracu (Ca) e seus cruzamentos recíprocos (ChCa e CaCh) gerados pelo cruzamento alternado Ch x Ca foram analisados. Todos os animais foram alimentados em baias individuais por períodos de 76 a 97 dias, quando receberam silagem de milho à vontade e concentrado contendo 17,8% PB e 79% NDT fornecido à base de 1% PV/animal/dia. As três características foram analisadas inicialmente em fun o do período de alimenta o, sendo o período total dividido em três sub-períodos e, posteriormente, no período total. As médias gerais para as três características, considerando-se o período total, foram 2,25 kg de MS/100 kg PV/dia, 6,75 kg MS/kg de GMD e 1,587 kg/dia, respectivamente, para CPUPV, CONV e GMD. Na análise por período, o grupo genético (GPO) influenciou CPUPV e GMD, mas n o a CONV. A intera o GPO x período n o mostrou efeito para qualquer das três características. O Ch superou o Ca para CONV (-0,861 kg de MS/kg de GMD) e GMD (0,163 kg/dia). A diferen a recíproca (ChCa - CaCh) foi significativa para as três características, e o ChCa foi melhor que o CaCh. Houve efeito da heterose sobre o GMD. O cruzamento alternado Ch x Ca igualou-se ao Ch e superou o Ca.
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