Racial and heterosis effects of prolificacy traits on complete diallelic crossings between four rabbit breeds
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Abstract
The maternal breed was the only important effect for the TB and BA. Chinchilla breed highlighted with more than seven kids for both measurements. Non-significant positive heterosis was found in the reciprocal crossings CCH-CHC for each trait under study, as in the CN-NC for the NW. Heterosis was negative or null in the other combinations. The use of C as maternal breed is a way to improve the traits TB and
BA. Advantages at the heterosis level are obtained with the CH-CHC crossing for all the prolificacy traits studied and with that of CS-SC for the WN. These results show that crossing is an alternative to increase productivity in different rabbit exploitations.
Key words: diallelic cross, rabbit, prolificacy, heterosis
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