A new mutant in the silkworm, "cray-fish pupa". and its linkage

概要

論文の詳細を見る
The "cray-fish pupa" is provided with two pairs of expanded wings, hence somewhat looking like a cray-fish (Astacus potamobius). The characteristic is evident in the pupal and imaginal stages, but not observable in the larva. The emergence of the adult and its mating seem to be more or less difficult owing to this abnormality, but the oviposition is usual because the sexual organs of the moths are normal.Those pupae occurred for the first time in a large number, about one-fourth of the family, in F4 of a hybrid _??_ (Japanese bivoltine breed×European univoltine (Bagdad))×_??_ Japanese bivoltine breed.By the crossing experiments with this mutant strain, I have come to the following conclusion.(1). The cf gene is simple recessive against the normal.(2). There is a linkage relation between cf and ch (chocolate larval colour gene), the crossing over value being calculated as 11.32% in the male and 0 in the female.(3). This cf-ch linkage group proved to be independent from ten other linkage groups.
日本遺伝学会の論文