A Comparison of the Diffusible Substances Concerned with Eye Color Development in Drosophila, Ephestia and Habrobracon.

Development of Eye Colors in Drosophila: Fat Bodies and Malpighian Tubes in Relation to Diffusible Substances.

T HAS been shown that diffusible substances are involved in the differI entiation of certain eye colors in Drosophila melanogaster (EPHRUSSI and BEADLE 1937a; BEADLE and EPHRUSSI 1937). Fat bodies are concerned with the production of one of these substances (v+ substance); two substances (v+ and cn+ substances) can be obtained from the Malpighian tubes of flies of certain genotypes. Preliminary...

Development of Eye Colors in Drosophila: Diffusible Substances and Their Interrelations.

N EXPERIMENTS reported in a series of papers by the authors an I attempt has been made to attack various problems concerned with eye color development in Drosophila melanogaster by the use of the technique of transplantation. These experiments have led to the elaboration of a scheme bearing on one phase of the general problem of the relation of genes to eye color development. Evidence has been ...

Malpighian Tubes as Sources of Diffusible Substances Development of Eye Colors in Drosophila: Fat Bodies

Studies of Eye Pigments of Drosophila. I. Methods of Extraction and Quantitative Estimation of the Pigment Components.

ICROSCOPIC observation, as well as solubility tests and studies of the M effects of gene substitutions, have shown that the normal, wild type eye color of Drosophila melafiogaster is due to the presence of two pigments, red and brown. These two pigments are the end products of two largely independent chains of reactions. Recent work on the genetic control of eye color in Drosophila was almost e...

Development of Eye Colors in Drosophila: Transplantation Experiments on the Interaction of Vermilion with Other Eye Colors.

From these results, it was postulated that two diffusible substances are involved in the development of wild type eye color, that a cinnabar fly is deficient in one of these (cn+ substance), and that a vermilion fly is deficient in both (cn+ and v+ substances). There is evidence for the existence of a third substance necessary for the development of wild type eye color (ca. substance, so named ...