Investigation on the evolution of pure lines of silkworm from imported hybrid seed
Investigation on the evolution of pure lines of silkworm from imported hybrid seed
M. N. Ashiq
ABSTRACT
Inbreeding and selection were carried out conducted for
7-9 generation for the evolution of pure lines of
silkworm from four hybrid populations imported from
China. Two external morphological characters as the
color and pattern of the larvae and shape of cocoon were
taken into consideration for purification of the lines.
With this method six pure lines, four of Chinese origin
and two of Japanese origin, were evolved. All these
lines were stable and bred true for the two characters.
They were all suitable for rearing in the spring season.
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March 1991
Vol. 41, Iss. 1
