Role of matereological variation on the RNA content in the fat body of multivoltine silkworm Bombyx mori linn

Bombyx mori (Lepidoptera: Bombycidae) a group of insect has high economic value. Continually domestication by human leads to the insect gets loss of its productivity and more sensitive to meteorological temperature climate. The present investigation was an attempt to analyze and compare the changes in protein content of all the body tissue of fat. It was found to increase in the races of Bombyx mori during developmental stages. Matereological variation has influenced on the total RNA content in the fat body of different developmental stages of Bombyx mori. The RNA content was maximum in the fat body of 5th instar larval reared at spring, while that was less in the fat body of adult reared at winter. All these Biochemical parameters were higher in female adult moth than in male adult moth. The specific activity of these RNA content showed a similar trend like that of protein content in fat body at different development stages in Bombyx mori L growth. Published studies of silks focus on processed fibers or the optimum condition for their production. Consequently the temporal impact of meteorological temperature on biochemical properties of cocoon are either poorly understood or kept as closely guarded industrial secrets.