Comparison of reproductive performance, live weight, survivability, and fleece characteristics of indoor-raised Central Anatolian Merino and Malya sheep

This study was conducted to compare Central Anatolian Merino (CAM) and Malya sheep under intensive conditions in terms of reproductive traits, birth and weaning weights, fattening performance, and some fleece characteristics. In this study, 840 CAM and 194 Malya ewes were used for the comparison of reproductive performance, whereas 740 and 211 lambs were used to compare growth traits between the two breeds. Additionally, the fattening performance of 61 CAM and 68 Malya lambs were compared. Finally, for the comparison of wool quality traits, 94 CAM and 90 Malya lambs were used. The lambs were kept together with the sheep that gave birth to them for 10 days. After this period, lambs were given lamb starter feed, alfalfa hay, and vetch hay in addition to milk. When lambs reached 40 days old, they were taken to the pasture with the sheep. In this period, pasture grass, growing lamb concentrate feed, alfalfa hay, and vetch hay were given in addition to milk. Lambs were weaned when they reached an average age of 90 days, and their live weights were determined. A determined number of lambs was selected from weaned male lambs. For these animals, in the fattening period, barley, alfalfa hay, vetch hay, meadow hay, and lentil straw were provided ad libitum in addition to 400 g/day/head of fattening feed. This study indicated that birth rate was better for CAM sheep than for Malya sheep. However, Malya lambs may have more advantages than CAM lambs in terms of survival and fattening performance. Although birth weight was higher for Malya sheep than for CAM sheep, the opposite result was observed for the weaning weight. The beginning weights of fattened male lambs were higher for CAM lambs than for Malya lambs, but the ending weights of both fattened groups were similar.(AU)

Correlated responses in linear type traits of nelore bulls of lines selected for post-weaning weights / Respostas correlacionadas à seleção para peso pós-desmame sobre características morfológicas de bovinos Nelore

The present study utilized the data from 364 nelore bulls born within three herd lines of the Estação Experimental de Zootecnia de Sertãozinho, São Paulo, Brazil and tested in the 1986, 1987 and 1988 performance tests. The herd lines were: selection line, NeS (high selection intensities for post-weaning weights); control line NeC (zero selection intensities) and traditional line NeT (intermediate selection intensities). The objectives were to evaluate the effects of selection on final weight on test (PPF); hip height (ALTPPF), and on several traits of a linear type appraisal scores. The type appraisal system considered the following traits, some of them considered important for racial standards: distance beetween horns (MA), bridge of nose (CHA); lenght of ears (ORE); lenght of neck (PES); size of hump (CUP); hair ands skin color (PEL); chest width (PEI), lenght of back and loin (DOR); body depth (PROF); lenght of sheath (UMB); pelvic angle (GINC); rump lenght (GCOM); pelvic width (GTRÁS), size of sacrum (SA), position of tail attachment (INS); angle of hind legs (POST) and lenght of shank (CAN). The line effect was significant for all the traits considered of economic importance like: PPF, ALTPPF, PEI, DOR, PROF, GCOM and GTRÁS and also for SA and INS. The higher least square means were those for NeS line, whose sires and dams were selected based on higher selection pressure (

Foram utilizados no presente trabalho os dados de 364 machos nelore dos rebanhos seleção, NeS (alto diferencial de seleção em pesos pós-desmame) controle, NeC (diferenciais nulos em pesos pós-desmame) e tradicional, NeT (diferenciais de seleção intermediários), da Estação Experimental de Zootecnia de Sertãozinho e avaliados nas provas de ganho de peso de 1986, 1987 e 1988. O objetivo principal foi o de avaliar o efeito da seleção para peso pós-desmame, praticada em cada um dos rebanhos. As características analisadas foram: o peso ao final da prova (PPF), a altura na garupa (ALTPPF), além dos seguintes caracteres morfológicos que receberam notas de 1 a 9 de acordo com: comprimento da marrafa (MA), do chanfro (CHA), das orelhas (ORE), do pescoço (PES), tamanho do cupim (CUP) e cor da pelagem (PEL), amplitude do peito (PEI), comprimento dorso lombar (DOR), profundidade do tórax (PROF) e comprimento do umbigo (UMB); inclinação (GINC), comprimento (GCOM) e largura da garupa (GTRÁ.S), saliência do osso sacro (SA), altura da inserção da cauda (INS), curvatura do membro posterior (POST) e comprimento do dianteiro (CAN). O efeito do rebanho mostrou-se significativo para todas características consideradas como econômicas isto é PPF, ALTPPF, PEI, DOR, PROF, GCOM, GTRÁS além de SA e INS. As maiores médias foram sempre para NeS cujos reprodutores foram escolhidos com base nos maiores difere

Correlated responses in linear type traits of nelore bulls of lines selected for post-weaning weights / Respostas correlacionadas à seleção para peso pós-desmame sobre características morfológicas de bovinos Nelore

The present study utilized the data from 364 nelore bulls born within three herd lines of the Estação Experimental de Zootecnia de Sertãozinho, São Paulo, Brazil and tested in the 1986, 1987 and 1988 performance tests. The herd lines were: selection line, NeS (high selection intensities for post-weaning weights); control line NeC (zero selection intensities) and traditional line NeT (intermediate selection intensities). The objectives were to evaluate the effects of selection on final weight on test (PPF); hip height (ALTPPF), and on several traits of a linear type appraisal scores. The type appraisal system considered the following traits, some of them considered important for racial standards: distance beetween horns (MA), bridge of nose (CHA); lenght of ears (ORE); lenght of neck (PES); size of hump (CUP); hair ands skin color (PEL); chest width (PEI), lenght of back and loin (DOR); body depth (PROF); lenght of sheath (UMB); pelvic angle (GINC); rump lenght (GCOM); pelvic width (GTRÁS), size of sacrum (SA), position of tail attachment (INS); angle of hind legs (POST) and lenght of shank (CAN). The line effect was significant for all the traits considered of economic importance like: PPF, ALTPPF, PEI, DOR, PROF, GCOM and GTRÁS and also for SA and INS. The higher least square means were those for NeS line, whose sires and dams were selected based on higher selection pressure (

Foram utilizados no presente trabalho os dados de 364 machos nelore dos rebanhos seleção, NeS (alto diferencial de seleção em pesos pós-desmame) controle, NeC (diferenciais nulos em pesos pós-desmame) e tradicional, NeT (diferenciais de seleção intermediários), da Estação Experimental de Zootecnia de Sertãozinho e avaliados nas provas de ganho de peso de 1986, 1987 e 1988. O objetivo principal foi o de avaliar o efeito da seleção para peso pós-desmame, praticada em cada um dos rebanhos. As características analisadas foram: o peso ao final da prova (PPF), a altura na garupa (ALTPPF), além dos seguintes caracteres morfológicos que receberam notas de 1 a 9 de acordo com: comprimento da marrafa (MA), do chanfro (CHA), das orelhas (ORE), do pescoço (PES), tamanho do cupim (CUP) e cor da pelagem (PEL), amplitude do peito (PEI), comprimento dorso lombar (DOR), profundidade do tórax (PROF) e comprimento do umbigo (UMB); inclinação (GINC), comprimento (GCOM) e largura da garupa (GTRÁ.S), saliência do osso sacro (SA), altura da inserção da cauda (INS), curvatura do membro posterior (POST) e comprimento do dianteiro (CAN). O efeito do rebanho mostrou-se significativo para todas características consideradas como econômicas isto é PPF, ALTPPF, PEI, DOR, PROF, GCOM, GTRÁS além de SA e INS. As maiores médias foram sempre para NeS cujos reprodutores foram escolhidos com base nos maiores difere