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Genetic characterization of Aberdeen Angus cattle using molecular markers
Vasconcellos, Luciana Pimentel de Mello Klocker;Tambasco-Talhari, Daniella;Pereira, Andréa Pozzi;Coutinho, Luiz Lehmann;Regitano, Luciana Correia de Almeida;
Genetics and Molecular Biology , 2003, DOI: 10.1590/S1415-47572003000200005
Abstract: aberdeen angus beef cattle from the brazilian herd were studied genetically using restriction fragment length polymorphism (rflp) of the k-casein - hinfi (csn3 - hinfi), b-lactoglobulin - haeiii (lgb - haeiii) and growth hormone alui (gh- alui) genes, as well as four microsatellites (texan15, csfm50, bm1224 and bm7160). the rflp genotypes were determined using the polymerase chain reaction (pcr) followed by digestion with restriction endonucleases and electrophoresis in agarose gels. with the exception of the microsatellite bm7160, which was analyzed in an automatic sequencer, the pcr products were genotyped by silver staining. the allele and genotype frequencies, heterozygosities and gene diversity were estimated. the values for these parameters of variability were comparable to other cattle breeds. the genetic relationship of the aberdeen angus to other breeds (caracu, canchim, charolais, guzerath, gyr, nelore, santa gertrudis and simmental) was investigated using nei's genetic distance. cluster analysis placed the aberdeen angus in an isolated group in the bos taurus breeds branch. this fact is in agreement with the geographic origin of this breed.
Genetic characterization of Aberdeen Angus cattle using molecular markers  [cached]
Vasconcellos Luciana Pimentel de Mello Klocker,Tambasco-Talhari Daniella,Pereira Andréa Pozzi,Coutinho Luiz Lehmann
Genetics and Molecular Biology , 2003,
Abstract: Aberdeen Angus beef cattle from the Brazilian herd were studied genetically using restriction fragment length polymorphism (RFLP) of the kappa-casein - HinfI (CSN3 - HinfI), beta-lactoglobulin - HaeIII (LGB - HaeIII) and growth hormone AluI (GH- AluI) genes, as well as four microsatellites (TEXAN15, CSFM50, BM1224 and BM7160). The RFLP genotypes were determined using the polymerase chain reaction (PCR) followed by digestion with restriction endonucleases and electrophoresis in agarose gels. With the exception of the microsatellite BM7160, which was analyzed in an automatic sequencer, the PCR products were genotyped by silver staining. The allele and genotype frequencies, heterozygosities and gene diversity were estimated. The values for these parameters of variability were comparable to other cattle breeds. The genetic relationship of the Aberdeen Angus to other breeds (Caracu, Canchim, Charolais, Guzerath, Gyr, Nelore, Santa Gertrudis and Simmental) was investigated using Nei's genetic distance. Cluster analysis placed the Aberdeen Angus in an isolated group in the Bos taurus breeds branch. This fact is in agreement with the geographic origin of this breed.
Carcass characteristics and meat quality of Aberdeen Angus steers finished on different pastures
Devincenzi, Thais;Nabinger, Carlos;Cardoso, Fernando Flores;Nalério, élen Silveira;Carassai, Igor Justin;Fedrigo, Jean Kássio;Tarouco, Jaime Urdapilleta;Cardoso, Leandro Lunardini;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000400030
Abstract: the present study was conducted to assess carcass features, physicochemical and sensory parameters of meat from steers finished on three types of pastures: natural pasture; natural pasture improved, fertilized and oversown with winter species; and annual summer grassland. the experiment was conducted from december 14, 2009 to november 30, 2010, with treatments distributed in a completely randomized design with a different number of replicates. animals were used as experimental units. experimental animals were aberdeen angus steers with twenty months of initial age and 354±27.4 kg of live weight, on average. the highest average daily gains were obtained for the annual summer grassland. there was no effect of treatments on carcass conformation. the highest carcass yield was obtained on the improved natural pasture. forequarter yield, side cut yield and longissimus muscle area were similar between the pastures. moisture and total lipids were not affected by the pasture. thawing and cooking losses were higher in improved natural pasture and lower in sorghum pasture. regardless of the treatment, the meat had luminosity ranging from intermediate to dark, high in red, high in yellow, and considered within the normal range for beef. meat of higher shear force was found in natural pasture, and lower shear force was observed in meat from annual summer grassland. average live weight daily gain explained 18% of the shear force. sensory evaluation by duo-trio test showed differences between samples from distinct pastures in flavor. all the studied systems allow for desirable characteristics in carcass and meat.
Pre-weaning performance evaluation of a multibreed Aberdeen Angus × Nellore population using different genetic models
Lopes, Jader Silva;Rorato, Paulo Roberto Nogara;Weber, Tomás;Araújo, Ronyere Olegário de;Dornelles, Mariana de Almeida;Comin, Juliana Grigolleto;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010001100014
Abstract: this work aimed at estimating the genetic effects that affect the pre-weaning performance of animals from multibreed crosses. in order to do so, it was used information of the weight at weaning of 79,521 animals, sired by 1,020 bulls and 61,898 cows from aberdeen angus and nellore breeds and from many genetic groups resulted from their crosses. five genetic models were tested: model 1, containing the fixed breed genetic effects (additive direct and maternal effects, heterozygote direct and maternal effects, epystatic direct and maternal effects, joint additive direct and maternal effects); model 2, equal to model 1, excluding direct and maternal joint additive effects; model 3, equal to model 1, excluding direct and maternal epystatic effects; model 4, equal to model 1, excluding direct and maternal epystactic effect and direct and maternal joint additive effects; and model 5, equal to model 1, excluding direct and maternal heterozygotic effects, direct and maternal epystatic effects and direct and maternal joint additive effects. the models were analyzed by the following methods: least square means method, ridge regression method, and the restricted maximum likelihood method. the dominant additive models usually used for genetic evaluations do not give a good description of the pre-weaning performance variations, making it necessary to add the heterozygote and epystatic effects; the joint additive effects do not significantly improve the adjustment of the analysis model and the heterozygote effects are efficient in representing a quadratic breed additive effect, in addition to insert an unnecessary bias assigned to multicollinearity related to the joint additive effects.
Eficiência produtiva em vacas primíparas das ra?as Aberdeen Angus e Charolês
Ribeiro, Edson Luis de Azambuja;Restle, Jo?o;Rocha, Marco Ant?nio da;Mizubuti, Ivone Yurika;Silva, Leandro das D?res Ferreira da;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000100019
Abstract: the objective of this work was to evaluate the productive efficiency of beef cows. thirty angus and 32 charolais primiparous cows, pregnant at the beginning of the experiment with straightbred or crossbred calves, were evaluated. the cows were submitted to different feeding management during winter and spring: t1 ? native pasture, t2 ? cultivated pasture for 60 days (24 hours/day), from early september to early november, t3 ? cultivated pasture for two hours a day, for 60 days, from early july to early september, t4 - cultivated pasture for two hours a day, for 60 days, from early july to early september, and more 60 days on cultivated pasture (24 hours/day), from early september to early november. productive efficiency was measured by calvingpe = (w205/cwc)*100, weaningpe = (w205/cww)*100, calvingmbpe = (w205/cwc.75), weaningmbpe = (w205/cww.75) and tdnpe = tdntotal/w205, where w205 is the calf weaning weight and cwc and cww are the cow weight at calving and weaning, respectively. tdntotal is the total energy requirement (maintenance + milk production) of the cow. aberdeen angus cows, cows with male calves and cows with crossbred calves were more efficient. cows that had access to cultivated pasture for a long period of time (t4) had better performance than those that were maintained on native pasture only (t1). cows of the other treatments had intermediate performance.
CARCASS CHARACTERISTICS OF ABERDEEN ANGUS STEERS FINISHED IN CULTIVATED PASTURE OR FEEDLOT CARACTERíSTICAS DE CARCA A DE NOVILHOS ABERDEEN ANGUS  [cached]
Fabiano Nunes Vaz,Jo?o Restle,Patrícia Alessandra Meneguzzi Metz,José Luiz Moletta
Ciência Animal Brasileira , 2008,
Abstract: The objective of this work was to study the carcass characteristics of Aberdeen Angus castrated steers, finished by 112 days in feedlot, with sugar cane + concentrate, or in cultivated pasture of ryegrass (Lolium multiflorum). Confined animals were fed with isonitrogeneous diets (13.2% of crude protein) containing, on dry matter, 72.3% of sugar cane and 27.7% of concentrate. Twelve steers, with initial weight of 320 kg and 20 months of age, were used. No difference (P> .05) was observed for slaughter and hot carcass weight that were, respectively, 396 and 202 for steers fed with cultivated pasture and 394 and 201, in the same order, for steers fed with sugar cane. There wasn’t difference (P> .05) between treatments for carcass hot dressing and commercial cuts percentages, carcass length, conformation, fat thickness and longissimus dorsi area. Has significative correlation in two treatments for carcass weight and cushion thickness, conformation and longissimus dorsi area. Steers finished on cultivated pasture the conformation was correlated with all variables. KEY WORDS: Bos taurus, dressing percentage, forage quality, Lolium multiflorum, sugar cane. O objetivo deste trabalho foi estudar as características de carca a de novilhos castrados Aberdeen Angus terminados por 112 dias em confinamento, com cana-de-a úcar + concentrado, ou em pastagem cultivada de azevém (Lolium multiflorum). Alimentaram-se os animais confinados com dietas isonitrogenadas (13,2% de proteína bruta) contendo, na matéria seca, 72,3% de cana-de-a úcar e 27,7% de concentrado. Utilizaram-se doze novilhos, com peso inicial de 320 kg e idade de 20 meses, arranjados num delineamento inteiramente casualizado. N o houve diferen a (P>0,05) nos pesos de fazenda e de carca a quente que foram, respectivamente, de 396 e 202 kg nos novilhos alimentados com pastagem cultivada e de 394 e 201 kg, citados na mesma ordem, para os novilhos alimentados com cana-de-a úcar. N o houve diferen a (P>0,05) entre tratamentos para as variáveis rendimento de carca a quente, percentagem dos cortes comerciais da carca a, comprimento e conforma o de carca a, espessura de gordura de cobertura e área de longissimus dorsi. Houve correla o significativa nos dois grupos de novilhos entre o peso de carca a e as variáveis espessura de cox o, conforma o e área de longissimus dorsi. Os novilhos terminados em pastagem tiveram a conforma o de carca a correlacionada com todas as outras variáveis medidas.
Avalia??o do desempenho na pós-desmama para uma popula??o bovina multirracial Aberdeen Angus x Nelore utilizando-se diferentes modelos genéticos
Lopes, J.S;Rorato, P.R.N;Weber, T;Araújo, R.O;Dornelles, M.A;Comin, J.G;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2010, DOI: 10.1590/S0102-09352010000600021
Abstract: in order to evaluate alternative genetic models to the additive dominant model, weights at yearling (ps) of 35,931 animals, sired by 752 bulls and 30,535 cows of aberdeen angus (a) and nellore (n) breeds and the genetic groups from their crosses were used. five different genetic models (m) were tested: m1, containing the direct additive fixed genetic effect (da), heterozygote direct (hd), epystatic direct (ed), and direct joint additive direct (dja); m2 was equal to m1, excluding dja effect; m3 was equal to m1, excluding ed effect; m4 was equal m1, excluding ed and acd effects, and m5 was equal to m1, excluding hd, ed, and dja effects. the models were analyzed by different methods: least square means method (mqm), ridge regression method (rc), and restricted maximum likelihood method (reml). estimated coefficients by rc showed magnitude and sign which were biologically explained. the estimates of the covariances, parameters, and genetic values varied among the models, indicating the importance of the correct choice of the model for analysis, being necessary a previous knowledge of the studied phenomenon and its biological interpretation. besides, it should always be considered the relationship between the independent variables before choosing a multibreed genetic analysis model. important additional effects to the da effect were considered by the inclusion of the hd and ed effects to the models for analysis. the dja math notation, currently used in the literature and tested in the present study, was not able to explain the breed complementarity, due to the multi colinearity among the studied effects
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.
Energia líquida no leite e desempenho de bezerros de vacas primíparas Aberdeen Angus
Lemes,J.S.; Pimentel,M.A.; Brauner,C.C.; Moraes,J.C.F.;
Archivos de Zootecnia , 2011,
Abstract: the availability of net energy in the milk of aberdeen angus primiparous cows and his relationship with the calves performance was studied. fourty seven cows, raised under a range condition, in aceguá. rs county, were evaluated between september 2005 to april 2006. milk production (pl) was estimated by before and after suckle method, from birth to weaning (189days), every 21 days. effects studied were pregnancy (g), and milk production level (npl): npla <1035.70 ± 36.65 kg
Eficiência produtiva em vacas primíparas das ra as Aberdeen Angus e Charolês
Ribeiro Edson Luis de Azambuja,Restle Jo?o,Rocha Marco Ant?nio da,Mizubuti Ivone Yurika
Revista Brasileira de Zootecnia , 2001,
Abstract: Este trabalho foi conduzido com o objetivo de avaliar o desempenho produtivo de vacas de corte. Foram utilizadas 30 vacas da ra a Aberdeen Angus e 32 da ra a Charolês primíparas, prenhes no início do experimento, com bezerros puros ou mesti os Nelore. As vacas foram submetidas a diferentes tratamentos alimentares durante o inverno e a primavera: T1 - pastagem natural, T2 - pastagem cultivada por 60 dias (24 horas/dia), do início de setembro ao início de novembro, T3 - acesso à pastagem cultivada por duas horas diárias, por um período de 60 dias (de início de julho ao início de setembro), T4 - acesso à pastagem cultivada por duas horas diárias, por um período de 60 dias (de início de julho ao início de setembro), e mais 60 dias (24 horas/dia) de pastagem cultivada do início de setembro ao início de novembro. As medidas de eficiência produtiva foram: EPPARTO = (P205/PVP)*100; EPDESMAME = (P205/PVD)*100; EPMBPARTO = (P205/PVP0,75); EPMBDESMAME = (P205/PVD0,75); e EPNDT = NDTTOTAL/P205, em que P205 é o peso ao desmame dos bezerros; PVP e PVD, os pesos das vacas ao parto e ao desmame, respectivamente; e NDTTOTAL, a exigência em energia para manuten o e produ o de leite das vacas. As vacas Aberdeen Angus, com bezerros machos e aquelas com bezerros mesti os, foram mais eficientes. Vacas que utilizaram a pastagem cultivada por um período de tempo maior (T4) tiveram melhor desempenho do que aquelas que permaneceram apenas em pastagem natural(T1); as vacas dos outros tratamentos tiveram desempenhos intermediários.
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