VARIATION IN THE PERFORMANCE OF SOME INDGENOUS MULTIVOLTINE MULBERRY SILKWORM BREEDS OF BOMBYX MORI L. IN TWO ENVIRONMENTS
P.R.T. RAO *
SILKWORM BREEDING & GENETICS SECTION, CENTRAL SERICULTURAL RESEARCH & TRAINING INSTITUTE, BERHAMPORE-742101, INDIA.
B. GHOSH *
SILKWORM BREEDING & GENETICS SECTION, CENTRAL SERICULTURAL RESEARCH & TRAINING INSTITUTE, BERHAMPORE-742101, INDIA.
S. CHATTOPADHYAY *
SILKWORM BREEDING & GENETICS SECTION, CENTRAL SERICULTURAL RESEARCH & TRAINING INSTITUTE, BERHAMPORE-742101, INDIA.
B.P. NAIR *
SILKWORM BREEDING & GENETICS SECTION, CENTRAL SERICULTURAL RESEARCH & TRAINING INSTITUTE, BERHAMPORE-742101, INDIA.
S.K. DAS *
SILKWORM BREEDING & GENETICS SECTION, CENTRAL SERICULTURAL RESEARCH & TRAINING INSTITUTE, BERHAMPORE-742101, INDIA.
G.C. ROY *
SILKWORM BREEDING & GENETICS SECTION, CENTRAL SERICULTURAL RESEARCH & TRAINING INSTITUTE, BERHAMPORE-742101, INDIA.
S.K. SEN *
SILKWORM BREEDING & GENETICS SECTION, CENTRAL SERICULTURAL RESEARCH & TRAINING INSTITUTE, BERHAMPORE-742101, INDIA.
*Author to whom correspondence should be addressed.
Abstract
A total of 8 indigenous multivoltine silkworm breeds have been reared during two favourable and two unfavourable seasons per year from 1988 to 1991 to evaluate the essence of economic triats of different breeds on varied environmental conditions. Statistical analysis of the rearing performance (ANOVA) reveal that the indigenous breeds NISTID possess high survival; TAMILNADU (W) has better ERR.WT., SCW, SSW and SR%; MORLA has longest FILLENG. and fine DN.; SARUPAT(W) has highest WT. of ML. which clearly indicate that these breeds can be utilised as better breeding materials for further hybridization studies.