Abstract
The occurrence of three fibroin phenotypes in the silkworm, Bombyx mori, has been demonstrated by comparing the electrophoretic mobility of fibroin large subunit on SDS-polyacrylamide gel (Hyodo, A. and Shimura, K. (1980) Japan. J. Genetics, 55: 203-209). In the present paper, linkage analysis of the fibroin gene was performed by observing the fibroin phenotype, using J-131 silkworm strain and twenty-four silkworm stocks carrying genetic markers on each chromosome. The fibroin gene was found to be linked with the Nd gene locating on the 23rd chromosome.
