家蚕染色体工程研究,起步很早,其成果巳为养蚕业广泛应用,在理论和实验技术方面也有很大发展。田岛于1941年用X射线照射,使蚕的第2染色体载有幼虫斑纹基因的片段易位到W染色体,作成幼虫斑纹自体鉴别的限性系统。并以此为素材,育成许多优良品种,在养蚕生产上大量应用至今。田岛(1951)还 Silkworm chromosome engineering research started very early, and its results have been widely used sericulture industry, in theory and experimental technology has also made great progress. In 1941, Tajima was irradiated with X-rays to translocate the chromosome 2 larvae of the silkworm silkworm into the W chromosome, making it a restricted system for self-identification of larvae. And as a material, bred a lot of fine varieties, a large number of applications in sericulture so far. Tajima (1951) also