Summary And Conclusion 6b4o4s

Summary and Conclusion

SUMMARY AND CONCLUSION The present study was carried out in the Poultry Complex of the faculty of Veterinary Science and Animal Husbandry, Orissa University of Agriculture and Technology, Bhubaneswar. The main parameters studied are growth, feed conversion efficiency, linear body measurements, mortality rate, carcass traits and meat composition.

Performances of two genotypes of broiler chicken were utilized in the study. The genotypes were; (i) Treatment group: (Hansli x CSML) ♂ x CSFL ♀ crosses; (ii) Control group: Coloured synthetic broiler (CSML ♂ x CSML ♀) crosses. Adult colour synthetic male line (CSML) males and colour synthetic female line (CSFL) females at the age of 40 weeks were housed in breeding pens in the ratio 1:7. Seven CSML males and fifty CSFL females were used for the cross breeding. Simultaneously, (Hansli x CSML) males as well as CSFL females were maintained in the same ratio to obtain pure eggs. The body weight of the control group were significantly (p≤0.01) higher than that of the treatment group for all ages up to the 8th week except that of the day old body weight. The control group is a cross of colour synthetic broiler parent line. The body weight of the treatment group in the present experiment was higher than the 8th week body weight of different broiler and native chickens due to the fact that the treatment group under study was developed by crossing of (Hansli x CSML) ♂ with CSFL ♀ resulting in 75 and 25 % contribution of broiler parent line and native chicken variety, respectively. This could be the reason of getting higher 8th week body weight of the treatment group as compared to other reported values of native and broiler crosses. There was no significant difference (P≥0.05) in the cumulative feed intake between the control group and the treatment group at 6th, 7th and 8th week of age. However the cumulative feed intake for 2nd, 3rd, 4th and 5th week of the treatment group was significantly (P≤0.05 or 0.01) lower than that of the control group. The cumulative feed consumption up to the 8th week of the control group was significantly (p≤0.01) higher (3955.73g) than that of the treatment group (3112.32g). Broilers are

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Summary and Conclusion selected for high growth, high feed intake and better feed conversion efficiency. The cross under study is a cross of (Hansli x CSML) ♂ with CSFL ♀ for which the feed consumption could have increased. Lower FCR values of the control group could be due to better feed conversion efficiency as it is a cross of two broiler parent lines. The treatment group which derived 25% germplasm from a native chicken variety that is Hansli, could have contributed to the higher FCR values during the period of study. Among the genotypes under study, both the groups had 1.66 % mortality having better adaptability to local climatic conditions. The mortality in chicks is influenced by several factors including the management practices. Therefore, a wide variation in mortality for the same genotype have been reported by different workers. As the mortality of the two genotypes under study was less than 2%, it was considered to be within the normal range. All the linear body measurement parameters except that of the beak length were significantly (p≤0.05) higher in the control group than in the treatment group. The control group is a cross of broiler parent lines which are selected over generations for higher breast angle, keel length, and shank length. Ttis could might be the reason for obtaining higher values for the parameters in the control group than in the treatment group, which is a cross involving a native population. Chicks in the control group showed lower values (p≤0.01 or 0.05) for breast angle and beak length at 6th week, while at 8th week, these differences were found nonexistent. This could might be due to the differences between the two genotypes in the growth pattern of these two organs. Higher carcass values were exhibited by the control group, though the differences were not statistically significant for some traits. This was because of higher live weight of the chicks in the control group. When the cut-up parts were expressed as a percentage of the eviscerated weight and dressed weight, no differences were found between the groups, except for the giblet weight (expressed as percentage of eviscerated weight), which showed higher values (p≤0.05) in favour of the control group. This could be due to the fact

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Summary and Conclusion that the control group had significantly (p≤0.05) higher liver weight than the treatment group. In the present experiment, no significant difference (P >0.05) in the breast and thigh meat composition was observed among the two genotype. From the results obtained in the present investigation and its subsequent analysis in relation to the findings of other workers it may be concluded that: The triple cross progenies of (Hansli x CSML) ♂ x CSFL ♀ attained a body weight of 997.867 ± 0.42 g at 8th week of age with an FCR of 3.26 ± 0.15 which were comparatively lower than the CSML ♂ x CSFL ♀ crosses. However, the (Hansli x CSML) ♂ x CSFL ♀ cross has a high livability percentage (98.33%) with superior meat quality (higher crude protein and lower fat). The (Hansli x CSML) ♂ x CSFL ♀ crosses could be suitable for rearing under semi intensive system of management profitably.

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