Location of fourth chromosomal male-determining factors of the housefly, Musca domestica.

Abstract

Two novel fourth chromosomal male-determining factors, IVM, of the housefly were mapped using a modification of the general mapping procedure for autosomal male-determining factors, AM (Inoue and Hiroyoshi 1984). On the basis of meiotic female recombination frequencies, the same gene order Barl-ye-M was demonstrated for the two IVM chromosomes. On both chromosomes, male recombination took place although at exceedingly low frequencies. From a comparison between the female and the male recombination maps, it appears that, unlike other AM factors examined so far, the two IVM factors are not located near the centromere.

Distribution of heterochromatin on the mitotic chromosomes of Musca domestica L. in relation to the activity of male-determining factors

“…In addition to unspecified vital functions of the two sex chromosomes, both can carry the dominant male-determining factor M (Hiroyoshi 1964;Rubini and Palenzona 1967;Denholm et al 1983). Since this factor can also be located on any of the five autosomes (Sullivan 1961;Wagoner 1969;Hiroyoshi and Inoue 1979;Inoue et al 1986), M was assumed to be a transposable element (Hiroyoshi 1964;Green 1980;Nöthiger and Steinmann-Zwicky 1985).…”

Migration and linkage disequilibrium in local populations of the housefly (Musca domestica) in Japan.

“…Although the Y chromosome is basically an M factor-carrier, M factors have been demonstrated in all of the five autosomal linkage groups (Sullivan, 1958;Wagoner, 1969;Hiroyoshi and Inoue, 1979;Inoue et al, 1986). Moreover, natural populations which are hard to detect the Y chromosome have been found in the United States (McDonald et al, 1975), Italy (Franco et al, 1982) and Japan (Tsukamoto et al, 1980).…”

Gametic selection affecting sex‐ratio in housefly(Musca domesticaL.)

“…Several sex-determining factors have been identified and analyzed in Musca domestica L. (Milani et al, 1967;Wagoner, 1969;McDonald et al, 1978;Hiroyoshi & Inoue, 1979;Tsukamoto et al, 1980;Vanossi et al, 1980;Franco, et al, 1982;Denholm et al, 1983;Inoue et al, 1986). Male determinants have been located on all the chromosomes (Y; X M ; M l ; M"; M m ; M IV ; M v ), whereas a female determinant is known only on autosome 4 (F IV ).…”