Lindsley & Grell, 1972, p. 215
location: 2-1.3 (0.02 unit to the left of ast).
origin: Spontaneous.
discoverer: Bridges, 15b12.
references: Bridges and Morgan, 1919, Carnegie Inst. Wash. Publ. No. 278: 259 (fig.). Morgan, Bridges, and Sturtevant, 1925, Bibliog. Genet. 2: 213 (fig.). Lewis, 1945, Genetics 30: 137-66. 1951, Cold Spring Harbor Symp. Quant. Biol. 16: 159-74 (fig.).
phenotype: Eyes slightly smaller and narrower than wild type; texture somewhat rough from rounded, irregular facets. Arrangement of hairs on surface of eye irregular. S/ast has small rough eyes; S ast/++ is like S/+. Enhanced by E(S); partially suppresses px and net (Bedichek, 1936, DIS 5: 24; Lewis, 1945). Homozygote dies in late embryonic stage (Sivertzev-Dobzhansky, 1927, Arch. Entwicklungsmech. Organ. 109: 535-48; Sonnenblick and Huettner, 1938, Genetics 23: 169). RK1.
cytology: Salivary glands normal. Placed in the 21E1-2 doublet, on basis of its inclusion in the synthetic deficiency derived by combining Y-centric portion of T(Y;2)21E = T(Y;2)21D4-E1 and 2-centric portion of T(2;4)astv = T(2;4)21E2-3;101. Heterozygosity for deficiencies including 21E1-2 produces S phenotype (Lewis, 1945).
other information: A pseudoallele of ast. In crossover tests, S localizes to the left of ast (Lewis, 1941, Proc. Natl. Acad. Sci. U.S. 27: 31-35; Lewis, 1945, 1951).
color figure: P. A. Otto (original)
b & w figure: Morgan, Bridges and Sturtevant, 1925, The Genetics of Drosophila, Bibliog. Genet. 2: 1-262 (original drawn by Edith M. Wallace)