Genetic studies on two egg mutants, 'small size egg' and 'lethal non- diapausing egg' in the silkworm, Bombyx mori

摘要

So far, many mutants related with egg character, such as size, shape, color, so forth, have been reported in the silkworm (Doira, 1978; Goldsmith, 1995; and Banno et al, 2005). We found two irregular egg characters in one hybrid strain, which had beensold as a commercial strain by the Katakura Company. One phenotype is small size eggs. In another mutant, the egg size was normal, but the hatching was not recognized. Preliminary tests showed that both mutants were controlled by recessive genes, whichhave non-allelic relationship. In this study, we analyzed the two mutants genetically and determined the two gene loci on linkage maps.