Authors : A. Shabdini, A.R. Seidavi, S. Gharahveysi and S.Z. Mirhosseini
Abstract: Considering the lake of sufficient information in connection with the three commercial line of silkworm 32, 104, 110 of Islamic Republic of Iran, the objective of research is to investigate the effect of sex, generation, line on economic cocoon traits in these 3 commercial lines. Economic cocoon traits of 3 lines 32, 104, 110 by utilizing 11259 records obtain from four generation in Iran Silkworm Research Center (ISRC) was assessed. The fixed effect of sex, generation, line on traits studied were significant (p<0.01). The commercial lines regarding cocoon traits were also significant which demonstrated the various genetic diversities of commercial lines of silkworm. The total average of the cocoon weight was measured at 1.667±0.0045. The averages of Cocoon Weight trait (CW) in line 32, 104, 110 were 1.734±0.0084, 1.6997±0.0047 and 1.5654±0.0066, respectively. The effect of line was very significant (p<0.001). The effect of the generation was significant too (p<0.001) and the average of 1st generation was higher than other generations and after that there were 3rd, 2nd and 4th generations. The effect of sex was very significant and the average of CW in females and males were 1.85±0.005 and 1.48±0.003 g, respectively. Total mean of Cocoon Shell Weight (CSW) was 0.3618±0.0009 and average of this trait in line 32, 104 and 110 were 0.3902±0.0016, 0.3675±0.0013 and 0.3268±0.0019 g. Effect of all fixed effects were significant on cocoon shell weight. Total average of Cocoon Shell Percentage (CSP) was 21.89±0.044. Average of this trait in line 32, 104 and 110 were 22.736±0.789, 21.8416±0.752 and 21.0677±0.694%. All of the fixed effects were significant on this trait. Average of 1st generation for this trait was 23.794±0.184 and the average of 2nd, 3rd and 4th generations were measured at 21.723±0.079, 21.936±0.081 and 21.628±0.072, respectively. In addition the value of this trait was higher in male than female.
A. Shabdini, A.R. Seidavi, S. Gharahveysi and S.Z. Mirhosseini, 2011. Effects of Sex, Generation and Genetic Group on Economic Traits in Three Iranian Commercial Silkworm Pure Lines. Journal of Animal and Veterinary Advances, 10: 341-345.