THE STUDY AND COMPARISION OF FATTENING POTENTIAL OF NATIVE, BEETAL AND THEIR CROSSBREDS GOATS BREEDS IN BALUCHESTAN AREA

The breeding of goat in Sistan and Baluchistan province, because of the specialenvironmental conditions and animal's better adaptability compared to the animalsand it's role in providing protein needs is very important. So, This study is anatempt animal at optimizing the province husbandry sources, specially goats.To perform this study, 120 kids were selected totally, 40 kids from each breed(native, crossbred and pakistani breeds) of wich 20 were male 20 were female andeach group at the ages of 3, 6, 9 and 12 months (totally 24 groups, each groupcomprising 5 kids). through a factorial test, in to a random complete blocking designwere measured. The animal feeding requirments were calculated by using of feedingrequirments standard table (NRC) (average 150 gerams daily gain) and the animalsfed for 114 days (14 days for geting adapted and 100 days for the original test). Theanimals were fed in group and the ration was given twice per day (in the morningand in the afternoon) in the from of mixed and adlib after being weighed and thedaily feed was calculated by subtracting the remaining feed in the next day.The treated animals, were weighed on the first day of begining of the trial and thenwere weighed once each month and finally they were weighed before slauthtering, 16houres of starving.The end of the testing period, 3 kids that approximated the mean weight of theirgroup, were selected and slaughtered, and the data regarding the specfications offatting and their carcass were collected and by use of the statistical SAS soft weare(GLM, programm) were analyzed.According to the obtained results, the mean daily gains of the native, crossbred andpakistani breeds were 70, 90. 42, 120. 31 grams respectively, the daily gains amongthe age groups of 3, 6, 9 and 12 month kids were 40.48, 70.89, 100.59, 110.26 gramsrespectivly, 1he mean daily gains among the males and females were 100.39, 70.92grams respectively. the difference between various breeds (females and males) andbetween various excepting the age groups of 9 and 12 months, were significant(p0.01). also, the result indicated that the groups number 10 (crossbred, female 3month of age), 14 (crossbred, female 9 month of age) and 2 (native, male 3 month ofage) were more feed efficiency and feed conversion than others.Regarding carcass characteristics, male kids compared the females, and among thevarious breeds, crossbreds compared to other breeds and among the age groups thekids of 12 months age had better carcass efficiency.This values for the male and female kids were 47.84 and 45.7 respectively, the valuesfor native, crossbred and pakistani were 44.42, 48.8 and 47 respectively, this figuresfor age groups of 3, 6, and 12 were 44.32, 44.5, 47.73 and 48.3 respectively. In relationto this characteristics the difference between the males and the females and betweenvarious breeds and between age groups excepting the groups 3, 6 months of age and9, 12 months of age was significant (p 0.01). the highest ratio of internal fat tocarcass weight (per gram) among breed, sexual and age groups was related to nativebreed, females and to the age group of 12 months age regarding this characteristic in the exclusion of native or crossbred and those aging 3 and 6 months old in othercharacteristics the difference between groups in every case was significant (p0.01). Regarding carcass parts the highest weight percentage of hindlimb and forelimb,flank and truther - file among the various breeds was related to native breed and thehighest carcass parts weight percentage was related to pakistani breed. the differencein the weight percentage of these parts and also neck among native, pakistani andcrossbreds was significant (p0.01), but the difference between crossbreds andpakistani breeds was not significant.Among the age groups the highest percent of hindlimb, flank and truther - file wasrelated to the age group of 3 months age, the highest percent of forelimb was relatedto the age group of 9 months age and the percent of neck and breast was related tothe age group of 12 months age. the difference of weight percent of the parts offorelimb and breast among the age groups of 3 and 6 were significant (p0.01), butin all of the cases between the age groups of 9 with 12 this difference was notsignificant, however, this difference in all of cases was significant between the groups3, 6 months with 9 and 12 months (p0.01).Regarding various 6 groups the males compare to the females in all of casesexcepting flank had more weight percent of parts and the difference between them inall of cases was significant (p0.01).