Gene Pool Of The Body Banding Patterns Of Barbus Tetrazona At North Sumatra

Study of gene frequencies and genotype of Sumatra Barbus was conducted to determine the the gene pool of body banding patterns of Sumatra Barbus Barbus tetrazona This research were done by examined the genotype and gene frequency in its population at North Sumatra. Sample of Barbus tetrazona were collected among its distributors at Medan and kept at several fish tanks. The acclimatizations were done for several months to growth and mature. When the fish reached its maturity male and female were separated in a special fish tanks and induced by using a reproductive hormone ovaprim 0.5 mg kg body for 2 times with an interval 8 hours. Then the male and females of the fish were conducted to mate. After spawning happened the fry would be separated. The fries were fed by rotifers and maintained until they reach maturity and ready to be mated. The hybrids would be carried out between individuals P F1 and F2 also testcross and back cross. Data obtained from those hybrids were analysed by Chi- Square based on Mendel law assumption. The result of the research showed that the majority of Barbus crossing were fit with Mendels assumption except 2 crossing showed unfitness from Mendels assumption. The genotype and gene frequencies of the body banding pattern of Barbus also in line with Mendels law. The additive complete dominant trait has the highest genotype and gene frequencies which are 0.62 and 0.55 respectively and the recessive trait also showed the lowest genotype and gene frequencies 0.09 and 0.29 respectively. Meanwhile the incomplete body banding had the genotype and gene frequencies 0.29 and 0.16 respectively.