Growth Performance of Two Crossbred Rabbit Genotypes Fed Two Levels of Dietary Protein

Abstract

A study was undertaken in which two crossbred rabbit genotypes were fed two levels of dietary crude protein with the objectives of assessing and comparing their growth performances as well as investigate any possible genotype × protein level interaction. Twenty-four (24) crossbred weaner rabbits (12 chinchilla × Dutch belted and 12 New Zealand white × California) at six weeks of age were used for the experiment. The rabbits were subjected to two diets containing 12% and 17% crude proteins, respectively in a 2 × 2 factorial, using a completely randomized design. Performance indices evaluated were final weight, weight gain, feed intake and feed conversion ratio. Data collected were subjected to analysis of variance (ANOVA). A significant (P<0.05) genotype effect was observed in all the growth traits studied. Protein level significantly (P<0.05) affected all growth parameters except feed intake (P>0.05). Similarly, genotype × protein level interaction was significant (P<0.05), affecting all the growth traits except feed intake. Both crossbred genotypes were similar in performance at 17% crude protein while the Chinchilla × Dutch belted crossbred was superior to the New Zealand white × California crossbred at 12% crude protein. It is therefore, recommended that the Chinchilla × Dutch Belted Crossbred rabbit be adopted for widespread use in Nigeria because of its high adaptability to a low crude protein diet (12% crude protein).