家蠶品系對核多角體病毒抵抗性之檢定

RELATIVE RESISTANCE OF THE SILKWORM, BOMBYX MORI STRAINS TO NUCLEAR POLYHEDROSIS VIRUS

廖光正(Guang-Jeng Liaw) ； 張廣淼(Goang-Miao Chang)

《中華昆蟲》 9卷1期 (1989/03) Pp. ap6+45-48

https://doi.org/10.6660/TESFE.1989006

摘要

將家蠶核多角體病毒之多角體懸浮液噴在桑葉上餵食不同品系的三齡家蠶，以檢定36種臺灣保存之家蠶品系對核多角體病毒之抵抗性。就半數感染濃度（IC_(50)）來看，日本系統的瀛國，和中國系統的華豐對核多角體病毒抵抗性最強。此二品系的四元雜交種，即（瀛國×瀛富）×（華農×華豐），因具有蠶作安定的優點，故自1972年起在臺灣推廣迄今一直廣受歡迎。各品系間的抵抗性差異可達100倍以上，但多化性品系與二化性品系兩者間家蠶之抵抗性差異並不明顯。各品系對多角體病毒之抵抗性與地理緣起無關。而強抵抗性品系之在春、秋兩季表現的抵抗性差異較小。

並列摘要

Fourteen Chinese, 16 Japanese and 6 tropical strains of the silkworm, Bombyx mori L., in Taiwan were inoculated with nuclear polyhedrosis virus (NPV) on mulberry leaves to determine their relative resistance to this virus. Yinko of Japanese strain and Fafon of Chinese strain showed the highest 50% infection concentration (IC_(50)) value, were most resistant to NPV. This result explained that why a double hybrid strain, (Yinko × Yinfu) × (Fanon x Fafon), has been the most stable and popular strain for extensive rearing in Taiwan since 1972. The tropical strains showed no significant difference in resistance to NPV compare with other bivoltine strains, implying that the concept of tropical strains being stronger than common bivoltines might be false. Comparison of the difference in resistance to NPV between spring- and autumn- reared silkworms revealed that resistant strain showed rarely seasonal variations.