Correlated Response in Carcass Traits When Using Selection Indexes Involving Marketing Body Weight and Daily Gain in New Zealand White Rabbits

Gouda, G. F.

doi:10.21608/ejap.2008.93864

Cited by 2 publications

(3 citation statements)

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“…Regarding tissue proportions, CF and CM contents ranged from 2 to 7.7 and 78 to 81.5%, respectively, which was in agreement with the previous studies carried out in the same breed (Ortiz-Hernández and Rubio-Lozano, 2001;Shahin, 2001;Gouda, 2008). These noticeable changes in lipid accumulation have been shown to be associated with age, genetic improvements, environmental temperature, and sexual maturity (Deltoro and Lopez, 1985;Martínez-Alvaro et al, 2018;Cesari et al, 2018).…”

Section: Discussionsupporting

confidence: 90%

“…With regard to HCW and CCW, they ranged from 0.7 to 2.2 kg, which was consistent with the results reported by North et al (2019), Cesari et al (2018), Michalik et al (2006) and Dalle Zotte and Paci (2014). Hot carcass yield was similar to that reported by several authors (Ortiz- Hernández and Rubio-Lozano, 2001;Gouda, 2008;Cardinali et al, 2015;Cesari et al, 2018;North et al, 2019). As animals' age at slaughter increases, organ growth tends to stabilize and carcass tissues continue to enlarge, resulting in higher carcass weight (North et al, 2017).…”

Section: Discussionsupporting

confidence: 86%

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Development of prediction equations to estimate carcass tissue composition in growing New Zealand White rabbits by shoulder and neck dissection

Arbez-Abnal¹,

Sanginés-García²,

Piñeiro-Vázquez³

et al. 2022

J. Anim. Feed Sci.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 86%

Development of prediction equations to estimate carcass tissue composition in growing New Zealand White rabbits by shoulder and neck dissection

Arbez-Abnal¹,

Sanginés-García²,

Piñeiro-Vázquez³

et al. 2022

J. Anim. Feed Sci.

View full text Add to dashboard Cite

“…Body length in the present study was estimated to be 39% heritable. This value was much lower than the estimate of 85% obtained by Gouda (2008) and greatly higher the estimate of 21% reported by Shemeis and Abdallah (1998).…”

Section: Results and Discussion Variabilitycontrasting

confidence: 65%

Selection Indexes for Efficient Meat Production Capacity from New Zealand White Rabbits

2023

AAVS

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To enhance meat production capacity in New Zealand white (NZW) rabbits, six unrestricted, two singlerestricted and one double-restricted selection indexes were constructed using phenotypic and genetic parameters estimated using multi-trait animal model on 458 growing rabbits, progeny of 25 bucks and 92 dams. The aggregate genotype involved post-weaning daily gain (DG), higher percentages of dressing (DP) and boneless meat (BMP). Sources of information were various combinations from weaning weight (WW), slaughter weight (SW), DG, body length (BL) and round girth (RG). The maximum accuracy of selection (R TI = 0.71) was obtained from the selection based on the full index (I 1 ) containing the five sources of information. Dropping WW and RG from the full index simultaneously, to form the best reduced index (I 3 ), is expected to reduce the accuracy of selection to 0.70. Selection based on DG alone (I 5 ) seems to be the most efficient single trait index (R TI = 0.57). Selection based on I 1 (Full index), I 3 (best reduced index) and I 5 (best single trait index) is expected to develop rabbits with faster DG (3.88 to 4.31 g/ day), higher DP (0.01 to 0.10 unit) and BMP (0.03 to 0.06 unit). This improvement in the aggregate genotype traits is expected to be associated with unfavorable genetic changes in carcass weight distribution and in carcass composition. Restricting the full index to result in zero genetic change in Muscle:Fat ratio (M:F) and hind leg percentage (HLP), separately, (I 1(HLP) and I1(M:B) , respectively) is expected to reduce the RTI by 17% and 23%, respectively. Restricting the same index (I 1 ) to result in zero genetic changes in both of HLP and M:B ratio, simultaneously (I 1 ( HLP, M:B) ), is expected to reduce the RTI by 20%. It could be recommended that in case of sub-optimal levels of HLP and M:F ratio, the use of the best reduced index (I 3 ) is expected to develop NZW rabbits with more efficient capacity in meat production, while the use of the double restricted form of the full index I 1(HLP, M:B) is recommended to be apply in case of optimal levels of both of HLP and M:F ratio.

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Correlated Response in Carcass Traits When Using Selection Indexes Involving Marketing Body Weight and Daily Gain in New Zealand White Rabbits

Cited by 2 publications

References 4 publications

Development of prediction equations to estimate carcass tissue composition in growing New Zealand White rabbits by shoulder and neck dissection

Development of prediction equations to estimate carcass tissue composition in growing New Zealand White rabbits by shoulder and neck dissection

Selection Indexes for Efficient Meat Production Capacity from New Zealand White Rabbits

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