STUDIES ON THE EVALUATION OF SEX-LIMITED COCOON COLOUR BIVOLTINE BREEDS OVBOMBYXMORIL.

摘要

Evaluation of CSR2 (SL) and CSR8 (SL) breeds with their normal counterparts, CSR2 and NB4D2 was undertaken. Comparative performance of sex-limited breeds with their control in three seasons of the year revealed significant (P < 0.05) variation for allthe traits except for cocoon weight, shell weight and shell percentage. Significant differences in cocoon traits and reeling parameters were observed in summer followed by rainy and winter seasons. The traits, shell weight, shell percentage, reelability, filament length and neatness have not shown significant differences for season x breed interaction. The hybrids PM x CSR2 (SL) and PM x CSR8 (SL) were on par with their control hybrids PM x CSR2 and PM x NB4D2 in majority of the economic traits exceptfor filament length and filament denier. In light of the results on hybrid performance with Pure Mysore, the sex-limited breeds, CSR2 (SL) and CSR8 (SL) could be effectively exploited as male component.