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UPSI Digital Repository (UDRep)
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| Abstract : Universiti Pendidikan Sultan Idris |
| This research was carried out to investigate the factors that influence the productive performance of crossbreeding in goats under controlled feeding and managing. A total of 205 goats from Al Hilmi Agrofarm, Slim River, Perak were used in this study. These goats comprised of three indigenous breeds, namely, Katjang, Boer, and Jamnapari, and their hybrids. Sixty female goats were divided into 2 groups; treatment group (n = 30) which received Controlled Internal Drug Release (CIDR) for 9 consecutive days and artificial insemination was done on the 10th day, and a control group (n = 30) with normal breeding. Adult goats and their kids from each groups were weighed weekly and blood samples were withdrawn in every 2 weeks. Blood samples were collected into two types of tubes; containing ethylenediaminetetraacetic acid (EDTA) for hematological studies and without EDTA for protein profiling and gene polymorphism. ANOVA and t-test were used to see if there is any significant differences on studied parameters between age, sex and breed. Findings showed the used of CIDR improved the reproductive efficiency in breeds, such as estrus synchronization and twin rate. Boer gave higher in twin rate compared to other breeds. The results of body weight showed Boer and Boer X Jamnapari (BJ) goats were higher than other breeds. However, Katjang and its hybrids; Boer X Katjang (BK) and Jamnapari X Katjang (JK) were better than other goats in comparison of blood parameters, such as haemoglobin and white blood cells count. Findings of protein profile study showed that there is no significant difference among breeds with respect to the α-casein values. Findings of DNA polymorphism showed that only alleles A, B and C of α-casein were detected in all breeds, whilst allele F were detected only in Jamnapari and its hybrids (JK and BJ) only. As a conclusion, Boer and Jamnapari crossbreeds are better in producing twins, high body weight and more variations in α-casein allele. The implication of this study is, it will be a reference and guidelines for the farmers to increase their herd production or researchers to pursue further studies in goats production. |
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