Journal Of Tropical Biosciences
Volume No: 10|
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Title: GENOTYPE OF SIRE AND DAM, PARITY AND SEX EFFECTS ON GROWTH TRAITS OF RABBITS
1-KABIR, M., AKPA, G.N., 2-NWAGU, B.I. AND 2-ADEYINKA, I.A.
1-GENETICS & ANIMAL BREEDING UNIT,&NBSP;DEPARTMENT OF ANIMAL SCIENCE,&NBSP;AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA
2-NATIONAL ANIMAL PRODUCTION RESEARCH INSTITUTE (NAPRI),&NBSP;AHMADU BELLO UNIVERSITY, SHIKA ZARIA, NIGERIA
Body weight (BW) and body linear measurements notably body length (BL), heart girth (HG), ear length (EL), tail length (TL), nose to shoulder (NTS) and shoulder to tail (STT) of 528 rabbits were analyzed at 6, 8 and 10 weeks of age. Three genotypes of sire and dam: Chinchilla (CHC), Californian white (CAW) and New Zealand white (NZW), 3 parities and 2 sexes (male and female) were evaluated. Statistical analyses were performed using the General Linear Model procedure of SAS. Results showed that sire genotype significantly (P<0.05) affected BW (g) at 6, 8 and 10 weeks of age, with the CHC genotype weighing heavier than both NZW and CAW genotypes. The EL, BL, HG at 6 weeks of age; EL, BL, TL at 8 weeks of age; and EL, BL at 10 weeks of age were significantly (P<0.05) affected by sire genotype. Dam genotype significantly (P<0.05) influenced BW across all ages. The CHC genotype had the highest BW (502.79g, 826.62g and 1103.64g) at 6, 8 and 10 weeks of age respectively, while the NZW genotype had the lowest BW (736.56g and 986.10g) at 8 and 10 weeks of age, respectively. Sex had no significant (P>0.05) effect on all growth parameters measured at various ages. Parity on the other hand, significantly (P<0.05) influenced the BW of the three genotypes at 6, 8 and 10 weeks of age. While rabbits that belong to parity 3 had the highest BW at 6 and 8 weeks of age, those in the parity 1 had the lowest BW at 6, 8 and 10 weeks of age, respectively. It was concluded that this results confirmed the superiority of CHC over NZW and CAW in terms of growth traits, irrespective of being sire or dam genotype.
In conclusion, the CHC genotype showed overwhelming superiority over the NZW and CAW in terms of growth performance up to 10 weeks of age. Generally, effects of sire and dam genotypes as well as parity were found to be significant on some of the parameters measured in the rabbits at various ages.