The characteristics and a karyological study of chicken-quail hybrids were investigated. Fertility of the genus-crossing between chickens and quail was 18.3%, among which the hatchability was 4.9%. From the chromosomal analysis of the genuscrossbred between chickens and quail, 55.6% of the embryos were males and the ones that hatched were all males, Average body weights of the genus-crossbred between chickens and quail were 197.8g at 8 weeks of age and 329.9g at 12 weeks of age, which were heavier than those of male quails of 128.2g and 126.4g at similar ages. The growth of the genus-crossbred was much faster than that of quails after 6 weeks of age. The origin of chromosomes 1, 2, and 4 from embryos and leukocytes of the chicken-quail hybrids was distinguished from chicken and quail. Differences of morphological features were not significant among tissues.