Isolating Mechanisms Be- Tween Drosophila Pseudoobscura and Drosophila Persimilis
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* Fellow in the Medical Sciences of the National Research Council. 1 Anderson, E. H., these PROCEEDINGS, 30, 397-403 (1944). 2 The asparagine medium consisted of: I-asparagine 0.2 per cent, dextrose 0.4, per cent, Na2HPO4 (anhydrous) 0.6 per cent, KH2P04 0.3 per cent, MgSO4 0.005 per cent, NaCl 0.005 per cent, glass distilled water. a The ammonium medium consisted of: NH4Cl 0.1 per cent, dextrose 0.4 per cent NaHPO4 (anhydrous) 0.6 per cent, KH2PO4 0.3 per cent, MgSO4 0.02 per cent, NaCI 0.05 per cent, glass distilled water. 4Demerec, M., and Fano, U., Genetics, 30, 119-136 (1945). 5 Delbriick, M., Biological Reviews, 21, 3040 (1946). 6 Delbruick, M., unpublished data. 7The following amino acids were tested: dl-alanine, 1(+)-arginine, I-asparagine, l(+)-aspartic acid, I(-)-cystine, l(+)-glutamic acid, glycine, l(-)-histidine, l(-)hydroxyproline, dl-isoleucine, l(-)-leucine, dl-leucine, l(+)-lysine, dl-methionine, dlnorleucine, dl-phenylalanine, l(-)-proline, dl-serine, dl-threonine, l(-)-tryptophane, l(-)-tyrosine, dl-valine. 8 Fildes, P., Brit. Jour. Exptl. Path., 21, 315-319 (1940). 1 Sneil, E. E., Arch. Biochem., 2, 389-394 (1943). 10 Tatum, E. L., Bonner, D., and Beadle, G. W., Ibid., 3, 477-478 (1944). " Tatum, E. L., and Bonner, D., these PROCEEDINGS, 30, 30-37 (1944). 12 Kindly provided by Dr. E. L. Tatum, Osborn Botanical Lab., Yale Univ.
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Genetics of Sexual Isolation between DROSOPHILA PSEUDOOBSCURA and DROSOPHILA PERSIMILIS.
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