Identification of multivoltine breeds and multivoltine � bivoltine hybrids of the silkworm, Bombyx mori L. through subordinate function index method

Abstract : 

A study was conducted for the identification of multivoltine breeds and multivoltine � bivoltine hybrids of the mulberry silkworm, Bombyx mori L. utilizing subordinate function indices method of Gower (1971). Out of four multivoltine breeds, DNP1 ranked first exhibiting maximum cumulative subordinate function indices value of 9.36 for eleven characters followed by DNP3 which exhibited higher cumulative subordinate function indices value of 9.07. Among seventeen multivoltine � bivoltine hybrids, DNP1 � CSR2 ranked first exhibiting maximum cumulative subordinate function indices values of 8.03 followed by DNP1 � CSR17 exhibiting cumulative subordinate function indices values of 7.68. Besides, seven multivoltine � bivoltine hybrids viz., DNP3 � CSR17, DNP2 � CSR17, DNP3 � CSR2, DNP2 � NB4D2, DNP2 � CSR2, DNP1 � NB4D2 and DNP2 � CSR4 were also found promising which exhibited cumulative subordinate function indices values of 6.73, 6.63, 6.58, 6.53, 6.31, 6.24 and 6.11, respectively. Application of subordinate function indices method for the identification of silkworm breeds and hybrids has been discussed


Keyword : 

Bombyx mori, performance, multivoltine bivoltine hybrids, silkworm breeds, subordinate function indices


Author(s) : , R. Singh, D. Gangopadhyay, R. Nirupama
Downloads : 800


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