different adult weight. The maternal line is selected for litter size (M; n=31) (adult weight /AW/ 4.0-4.5 kg); the Pannon White (P; n=42; AW: 4.3-4.8 kg) and a large sized (paternal) line are selected for weight gain and for carcass traits (using CT-data). The average daily gain (between the ages of 5 and 11 weeks) of the L rabbits exceeded that of the P and M rabbits by 4.3 and 8.8 g, respectively (P<0.001). 272 and 491 g differences were found for 11 week old body weight. The daily feed intake of the L rabbits was 17 and 23 g higher that that of the P and L group (P<0.001). The feed conversion ratio and the mortality rate of the 3 genotypes did not differ. The highest dressing out percentage (61.3%) was observed by the P rabbits exceeding by 1.1% the M group (P<0.05). The dressing out percentage of the L groups was also favourable (61.1%). Compared to the reference carcass the ratio of the fore part was the highest (26.9%) and the lowest (25.7%) for the L and P groups, respectively. An opposite order was recorded for the ratio of the hind part (L: 37.2%, P: 38.2%). The ratio of the perirenal fat was similar for every genotype. Based on the results it can be concluded that feed intake and final weight are determined by the adult body weight (of the genotypes) (the large sized line showed the most favourable performances), dressing out percentage and ratio of the fore and hind parts are determined by the CT aided selection (P rabbits achieved the best results).

Comparison of productive and carcass traits of different genotypes

RIOVANTO, ROBERTO;DALLE ZOTTE, ANTONELLA
2009

Abstract

different adult weight. The maternal line is selected for litter size (M; n=31) (adult weight /AW/ 4.0-4.5 kg); the Pannon White (P; n=42; AW: 4.3-4.8 kg) and a large sized (paternal) line are selected for weight gain and for carcass traits (using CT-data). The average daily gain (between the ages of 5 and 11 weeks) of the L rabbits exceeded that of the P and M rabbits by 4.3 and 8.8 g, respectively (P<0.001). 272 and 491 g differences were found for 11 week old body weight. The daily feed intake of the L rabbits was 17 and 23 g higher that that of the P and L group (P<0.001). The feed conversion ratio and the mortality rate of the 3 genotypes did not differ. The highest dressing out percentage (61.3%) was observed by the P rabbits exceeding by 1.1% the M group (P<0.05). The dressing out percentage of the L groups was also favourable (61.1%). Compared to the reference carcass the ratio of the fore part was the highest (26.9%) and the lowest (25.7%) for the L and P groups, respectively. An opposite order was recorded for the ratio of the hind part (L: 37.2%, P: 38.2%). The ratio of the perirenal fat was similar for every genotype. Based on the results it can be concluded that feed intake and final weight are determined by the adult body weight (of the genotypes) (the large sized line showed the most favourable performances), dressing out percentage and ratio of the fore and hind parts are determined by the CT aided selection (P rabbits achieved the best results).
Proc. 21st Hungarian Conference on Rabbit Production
9789639821095
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/2504362
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