Studies on Nutrigenetic Traits of Silkworm, Bombyxmori L. for Determining Growth and Development for Identifying Parental Breeds for Breeding under Subtropical Region of North West India

Abstract

Study was conducted during spring and autumn season (2018 & 2019) to screen and identify rich nutrigenetic breeds from the selected breed’s for their nutrigenetic traits in silkworm, BombyxmoriL.(Lepidoptera: Bombycidae) is an essential prerequisite for better understanding and development of nutritionally efficient breeds under Subtropical condition of Jammu based on the breeds which shows less food consumption with higher efficiency conversion based on leaf to cocoon and leaf to shell ratio. Highly significant variations were found among all nutrigenetic traits of bivoltine silkworm breeds in the study. The nutritionally efficient silkworm breeds were shortlisted by utilizing nutrition consumption index and efficiency for conversion of ingesta/cocoon traits as the index for selection of highly promising breeds. Furthermore, based on the average of data from both the seasons, the overall rearing nutrigenetic traits utilized as index, eight bivoltine silkworm breeds (B.con 1, B.con 4, BHR 2, ATR 16, BHR 3, CSR 50, RSJ 14 and NB4D2) were identified as havingthe potential for nutrition efficiency conversion and can be utilized for further breeding programme. The data from the present study advances our knowledge for the development of nutritionally efficient silkworm breeds/hybrids and their effective commercial utilization in the sericulture industry.