A multivoltine silkworm race, DAK-205, was evolved from a Japanese race AIJ-205 during breeding experiments for development of pure lines. The newly developed line was reared for six generations in succession from April - October in 1987 including the hot months of June, July and August when the room temperature was as high as 30°C and the relative humidity as low as 55%. The line thus evolved can yield several crops of cocoons in a year and is also resistant to silkworm diseases, high temperature and low humidity.