Estimation of crossbreeding parameters for average daily gain, feed intake and feed conversion ratio in five rabbit lines

Gomez, E.A.; Piles, M.; Orengo, J.; Rafel, O.; Ramon, J.

Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002 Session 4: 0-5

2002


Accession: 003755448

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Abstract
Crossbreeding parameters of average daily gain (ADG), collective feed intake (FI) and feed conversion rate (FCR) were estimated in a diallel crossbreeding plan concerning five selected lines of rabbits. Direct genetic effects for ADG were clearly different between sire and dam lines (R (3.03 g/day) and C (2.26 g/day) vs. A (-3.28 g/day), and R vs. V (-1.49 g/day)). With respect to FI, differences on direct genetic effects were observed between lines A (-5.39 g/day) and V (2.67 g/day). Posterior distributions of maternal genetic and individual heterosis effects were distributed around zero, being insignificant the differences between lines for almost all the parameters. Therefore, differences between crossbreeding genetic types for these traits in rabbits are mainly explained in terms of direct genetic effects.