Comparative Study of Biological Characters of Silkworm Eggs

Abstract

The silkworm Bombyx mori L. is a domesticated insect considered as a reference in several domains (Mauchamp et al., 2008). The theoretical and practical importance of the silkworms are shown in many studies (Nagaraju et al., 1996;Kipriotis et al., 2000;Sudhakara et al., 2003;Vassileva et al., 2004;Petkov et al., 1998;Matei et al., 2002;. This study was conducted to compare four monovoltine breeds of Romanian silkworm, hatching in specific conditions, in different years (2001 and 2008), to see if there is a major difference between the biological characters of eggs belonging to those breeds in time. For both 2001 and 2008 years, four breeds AC29, AC, B1 and AB of Bombyx mori (eggs) were obtained from SC SERICAROM (Bucharest, Romania) and the same microclimate conditions were assuring. In total, per data set of each year were 16 variants because each of the breed was hatch in four variants, for more complete results of analyzed samples. The evaluation was made on the base of indices used for classified biological characters of silkworm eggs, comparative data shows that, between the same breeds hatching in different years, there is no significant difference. According to biological characteristics, the study allowed us to make a classification of the analyzed breeds. In the present research, we demonstrated that biological characters of silkworm eggs were well preserved and there are no significant variations between both set of data taken in study.