Biomedical subjects

A Fukatami

Publications and source records attributed to A Fukatami.

10 recordsLinked to original sources

PubMed1990

[Interspecific hybridization in the Drosophila takahashii subspecies complex].

To elucidate the relationship between 6 species involved in the Drosophila takahashii complex, we analyzed the existence of interspecific hybridization, hybrids number with sex ratio, and the reproductive status of the hybrids of these species. We found that each of the 6 species formed hybrids with at least one other species. The most closed relationship among these species was confirmed to be between D. lutescens and D. trilutea, and D. prostipennis was rather isolated from the other 5 species. In ascending order D. takahashii showed a closed relation to D. lutescens, D. trilutea, and D. paralutea. It was shown that D. prostipennis and D. nepalensis form hybrids with D. paralutea and D. lutescens, respectively.

Animals↗

PubMed1989

[Genetic study of ovary development in Drosophila lutescens].

Experiments were carried out in order to clarify the genetic mechanism governing the development of ovaries of Drosophila lutescens female flies. Female flies of two strains obtained from northern (Niigata) and southern (Tokunoshima) parts of Japan, F1, F2, and backcrossed hybrids were examined. Female flies, one week after emergence at 14 degrees C, during which time they were kept under a 10 h 30 min light/13 h 30 min dark regimen, were dissected, and they were divided into three classes: those with mature, retarded, and undeveloped ovaries. The ratio of undeveloped ovary in the northern strain was much higher than that of the southern. From the results of all dissections, it is assumed that genes on chromosomes of the northern strain operate to stop ovarian development and that cytoplasmic factors of the southern strain act to suppress those genes. It may be, therefore, suggested that the development of the ovary of this species before hibernation is controlled genetically.

Animals↗

PubMed1986