ISOZYME PATTERNS OF ESTERASES IN SOME RACES OF Bombyx mori DURING ONTOGENY

Electrophoretic isozyme patterns of esterases (α and β) in three races i. e. PM, Dz andKA of Bombyx mori have been studied during ontogenic development. A composite zymogram revealedpresence of sixteen, twenty one and nineteen isozymes for a-esterase in PM, Dz and KA races respec-tively. Fifteen, nineteen and fifteen bands were noticed for fyesterase during ontogeny in PM, Dz andKA respectively. Many of the isozymes appear, disappear and reappear in developmental stages. How-ever, larvae showed maximum esterase heterogenity.