The present experiment was carried out with a view to combine the best characters
of the popular evolved multivoltine breed 'G' with bivoltine hybrids for rearing
under tropical conditions. The crosses and their parents were reared during three
seasons for study of heterosis. Heterosis over mid-and better parents was determined
for seven important commercial characters. The degree of heterosis varied considerably
for different economic characters in different seasons. Highly significant he.terosis
was noticed over both parental values for most of the characters during dry summer
season. The overall data indicate that two crosses viz., G x (PSxNB18) and G x
(NB18xP%) during dry summer and two crosses viz., G x (KPG-BxNB7) and G x
(NB7x KPG-B) during autumn and winter seasons can be exploited commercially
in the tropical plants.
Keywords: Bombyx mari L., silkworm, heterosis, three-way crosses.
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
S. K. DAS, B. GHOSH, S. PATTNAIK, N. K. DAS, T. SINGH, S. K. SEN AND G. SUBBA RAO info_circle