Predicción del peso en canal al beneficio en conejos Nueva Zelanda a partir de medidas corporales

Montes-Vergara, Donicer; Lenis-Valencia, Claudia Patricia; Hernández-Herrera, Darwin

doi:10.21897/rmvz.1990

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Moreover, these rabbits would be higher in carcass weight (r G = +0.50, +0.83 and +0.38, respectively) with an improvement in dressing percentage (r G =+0.10, +0.11 and +0.24, respectively) and muscle to bone ratio (r G = +0.09, +0.15 and +0.13, respectively). The same trend of associations was previously reported for carcass weight with weaning weight (Montes-Vergara, 2021) and with slaughter weight (Rotimi et al, 2021;Montes-Vergara et al, 2021;Montes-Vergara et al, 2020 andSam et al, 2020).…”

Section: Genetic and Phenotypic Correlationssupporting

confidence: 86%

Consequences of Selection for Post-Weaning Growth Performance on Carcass Attributes in Rabbits

Gouda

Shemeis

2022

Egyptian Journal of Rabbit Science

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The aim of this work is to investigate the consequences of selection for postweaning growth performance on carcass composition and carcass meatiness traits. Seven selection indices were applied using estimates of genetic and phenotypic parameters on 218 New Zealand White (NZW) rabbits, progeny of 24 bucks and 93 does, via a multi-trait animal model. Weaning weight (WW), Slaughter weight (SW) and daily gain between them (DG) were used as sources of information. The breeding objective was to enhance the profitability of NZW rabbit breeders by maximizing WW, SW, and DG. The carcass composition was represented as the percentage of dissected side weight deposited as muscle (MP), Fat (FP), and bone (BP), while carcass meatiness traits were represented as carcass weight (CW), dressing percentage (DP), muscle: bone ratio (MB), and muscle: fat ratio (MF). The heritability estimates (h2 ) were 0.69, 0.44 and 0.54 for WW, SW and DG, respectively. Carcass composition traits showed moderate estimates of h 2 for MP (0.31) and FP (0.35) and a very high value for BP (0.91). The h 2values for carcass meatiness traits were 0.42, 0.43, 0.89, and 0.75 for CW, DP, MB, and MF, respectively. The full index (I 1 ): I 1 = 6.39 WW -1.85 SW + 150.92 DG had the highest correlation with the aggregate genotype (r TI = 0.81), followed by the best reduced index involving WW and DG (r TI = 0.79): I 3 = 4.21 WW + 71.74 DG. However, the single trait selection index based on WW alone (I 5 = 4.46 WW) is expected to be as efficient as the best reduced index (r TI = 0.76). At each round of selection with the intensity of selection = 1.0, applying of I 1 , I 3 and I 5 are expected to result in developing NZW rabbits with better post-weaning growth performance in terms of heavier body weight at weaning (ranged from 112.93 to 121.35 gm) and slaughtering (ranged from 124.70 to 135.52 gm) with faster daily gain (ranged from 0.32 to 0.78 gm/day). This enhancement in postweaning growth performance is expected to consequence in an increase in MP (ranged from 0.67 to 0.82 unit) and FP (ranged from 0.31 to 60 GOUDA AND SHEMEIS 0.59 unit) and reduction in . Carcass meatiness traits are expected to be more favorable in terms of higher DP (ranged from 0.14 to 0.38 unit) and MB ratio (ranged from 0.28 to 0.36 unit) and less favorable in terms of MF (ranged from -0.23 to -1.60 unit). Conclusively, the results obtained in the present study suggested that selection based on the single trait index I 5 including the weaning weight trait would be recommended to improve the given aggregate genotype traits for being an early, single, and easy-to-measure.

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Section: Genetic and Phenotypic Correlationssupporting

confidence: 86%

Consequences of Selection for Post-Weaning Growth Performance on Carcass Attributes in Rabbits

Gouda

Shemeis

2022

Egyptian Journal of Rabbit Science

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Using Post-Mortem Measurements to Predict Carcass Tissue Composition in Growing Rabbits

Croda-Andrade

Valencia-Garcia

Arbez-Abnal

et al. 2022

Animals

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The objective of this study was to determine post-mortem measurements for predicting carcass traits in growing rabbits. A total of 50 clinically healthy New Zealand White × Californian male rabbits with a body weight (BW) of 1351 ± 347 g between 60 to 80 days of age were used. Body weight was recorded 12 h before slaughtering. Data recorded at slaughtering included carcass weights (HCW). After cooling at 4 °C for 24 h, carcasses were weighed (CCW) and then were carefully split longitudinally with a band saw to obtain left and right halves. In the right half carcass, the following measurements were recorded using a tape measure: dorsal length (DL), thoracic depth (TD), thigh length (TL), carcass length (CL), lumbar circumference (LC). The compactness index (CCI) was calculated as the CCW divided by the CL. Thereafter, the right half carcass was weighed and manually deboned to record weights of muscle (TCM), and bone (TCB). The CCI explained of 93% of variation for TCM (R2 = 0.93 and a CV = 9.30%). In addition, the DL was the best predictor (p < 0.001) for TCB (R2 = 0.60 and a CV = 18.9%). Our results indicated that the use of carcass measurements could accurately and precisely (R2 = ≥ 0.60 and ≤0.95) be used as alternatives to predict the carcass tissues composition in growing rabbits.

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Predicción del peso en canal al beneficio en conejos Nueva Zelanda a partir de medidas corporales

Cited by 2 publications

References 13 publications

Consequences of Selection for Post-Weaning Growth Performance on Carcass Attributes in Rabbits

Consequences of Selection for Post-Weaning Growth Performance on Carcass Attributes in Rabbits

Using Post-Mortem Measurements to Predict Carcass Tissue Composition in Growing Rabbits

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