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EVALUATION OF THE DAIRY POTENTIAL OF BUNAJI AND BOKOLOJI BREEDS
Abstract:
The Study herein reported involves the evaluation of the dairy potential of Bunaji, Bokoloji (Sokoto Gudali) breeds on dairy productive traits in which a total of 3105 records of 761 cows over a period of 24 years were used. The records on birth weight were 3647 for the two breeds. The investigation also included the study on the environmental factors influencing dairy traits and the genetic estimates of the dairy traits. Results showed that for both breeds, the Chi-squares comparison showed significant differences for both first and all calvings between year and (P<.0.05). The recorded age at first calving were 45.7 months and 46.7 months for Bunaji and Sokoto Gudali breeds. The Calving interval recorded for bunaji and Sokoto Gudali breeds were 13.46 months and 13.45 months. For the 305-day milk yield results showed that whereas the effects of breed was not significant (P>0.05), the effects of year or month of calving as well as parity were all significant (P<0.001). The average milk yield for all lactations were 1039 kg and 1055 kg for Bunaji and Sokoto Gudali breeds. Regarding lactation length, results showed non-significance (P>0.05) for effects of breed, but the effects of year and parity were very highly significant (P<0.001). and the effects of month of calving was also highly significant (P<0.003). The lactation length recorded was 239.2 days and 236.2 days for Bunaji ana sokoto Gudali breeds respectively. The heritability estimates for age at first calving, calving interval, lactation length, milk yield per day dry period, all lactation milk yield and birth weight varied from 12 to 0.40 and 0.12 to 0.31 respectively for Bunaji and Sokoto Gudali breeds. The estimates of genetic progress revealed that the genetic improvement of 0.9% and 0.5% per year were obtained respectively for Bunaji and Sokoto Gudali breeds. Selection for improvement in milk yield indirectly through selection for lactation length showed the least loss in accuracy when selection is made for the top 5% as compared with the top 25% of the cow population
EVALUATION OF THE DAIRY POTENTIAL OF BUNAJI AND BOKOLOJI BREEDS
