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Article Abstract
In the present study, the conformation of the of seven genetic lines of broilers was analyzed by Geometric Morphometrics and correlated to carcass weight and walking ability. The used chicken genetic lines were classified as fast, medium, or slow growing and ranked for their walking ability. Six chicken types were reared in an organic farm and slaughtered at 81 days of age while one slow-growing and highly walking line (Naked Neck) was reared in a commercial farm and used as external reference for moving activity and growth speed. A mixed landmarks and semi-landmarks model was applied to the study of shape. Results of this study showed that: (i) body weight gain was positively correlated to the curvature of the antero-posterior axis of the ; (ii) the shape of the and the active walking behavior were significantly correlated; (iii) walking and not-walking genetic lines could be discriminated in relation to the overall shape of the ; (iv) a prevalence of static behavior was correlated to a more pronounced curvature of the antero-posterior axis of the . Results of this study revealed that the walking genetic types have a more functional and natural conformation. This easy morphologic method for evaluating shape could help to characterize the adaptability of genotypes to organic and outdoor rearing.
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| http://dx.doi.org/10.3390/ani11010101 | DOI Listing |
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