한성계통의 전견중 , 견층중 , 견층비율에 대한 성차

Using sexual differences between female and male as the indication of the degree of the physiological disturbance in the sex·limited larval marking strains or sex-limited egg colour strains, it was investigated whether the physiological disturbance caused by the translocated autosome fragment on the W·sex determination chromosome, have an effect on expression of the three quantitative characters; cocoon weight, cocoon shell weight, and cocoon shell percentage in the female silkworm. The mean values of the ratios of female to male the above two experimental groups were 127%, 107%, 85%, in cocoon shell weight, and cocoon shell percentage, respectively. On the other hand, those from the three normal strains, namely the basic stock strains, white egg strains, and hybrids were 129% for cocoon weight, 110% for cocoon shell weight, and 85% for cocoon shell percentage, respectively. From the results, it comes to the conclusion that the translocated autosome fragment on the W·chromosome has no influences on the expression of the quantitative characters of the female silkworm because sexual differences of the sex·limited strains were very similar to those of the three normal strains.