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Crossbreeding effects for carcass, tissues composition and meat quality traits in a crossing project of V-line with Saudi Gabali rabbits.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Al-Saef, A. M. Khalil, M. H. Al-Dobaib, Soliman N. García, M. L. Baselga, Manuel Xicato, G. Trocino, Angela Lukefahr, Steven D. |
| Copyright Year | 2008 |
| Abstract | A five-year crossbreeding project involving Spanish maternal line called V-line (V) and Saudi Gabali (S) rabbits was carried out to produce 14 genetic groups of V, S, 1⁄2V1⁄2S, 1⁄2S1⁄2V, 3⁄4V1⁄4S, 3⁄4S1⁄4V, (1⁄2V1⁄2S), (1⁄2S1⁄2V), (3⁄4V1⁄4S), (3⁄4S1⁄4V), ((3⁄4V1⁄4S)), ((3⁄4S1⁄4V)), Saudi 2 (synthetic maternal line), and Saudi 3 (synthetic paternal line). A total number of 2770 rabbits produced by 91 sires and 402 dams were used to evaluate carcass components, tissue composition and meat quality traits. A generalized least square procedure was used to estimate additive and heterotic effects (direct, maternal, and grand-maternal). The estimates of direct additive effects were significant and in favour of V line rabbits for the majority of traits studied, ranging from 3.8 to 9.0% for slaughter and edible carcass components, 3.4 to 10% for non-edible traits, -3.1 to 9.8% for tissues compositions, and -14.9 to 2.5% for meat quality traits. Maternal additive effects were significantly in favour of V line by 1.66% for meat ether extract (11.1% relative to the average of the V line and Gabali as purebreds). Grandmaternal additive effects were not significant in most traits studied except dry matter and ash contents in meat since the effect of the V line was higher than the effect of the Gabali by 0.5% and 1.39%, respectively (0.7% and 15.4% of the respective averages of the pure breeds). Heterosis estimated for non-edible traits were mostly positive and only significant for head weight (direct and grand-maternal heterosis), fur weight (grand-maternal heterosis), lung weight (maternal and grand-maternal heterosis) and viscera weight (maternal and grand-maternal heterosis); the estimates were small relative to the average of purebreds reaching 6.4% as maximum value. Estimates of direct, maternal and grandmaternal heterosis for meat weight were found to be consistent and positive (3.9, 4.5 and 5.0%, respectively) associated with significant direct heterosis for fat weight (12.2%), maternal heterosis for meat bone ratio (4.5%), and maternal and grand-maternal heterosis for dry matter in meat. The estimates of direct heterosis for protein content in meat were significantly positive (1.4%), but the estimates for grand-maternal heterosis were significantly negative (-2.1%). For fat content in meat, the estimates of direct (-8.3%) and maternal heterosis (-11.9%) were significant, while for ash content the estimates for maternal (23.7%) and grand-maternal heterosis (30.1%) were significantly positive. |
| Starting Page | 35 |
| Ending Page | 40 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://world-rabbit-science.com/WRSA-Proceedings/Congress-2008-Verona/Papers/G-Al-Saef.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
