The detection, in unordered octads, of 6+:2m and 2+:6m ratios with postmeiotic segregation, and of aberrant 4:4s and their use in corresponding-site interference studies

BY AGLAIA GHIKAS AND B. C. LAMB

Department of Botany, Imperial College, London SWl 2BB

Vol. 29, No. 3 p. 273.

The first line should read ‘originally PD or NPD 4:4(4)s,’.

Sterile mutation in Drosophila melanogaster

BY TAKAO K. WATANABE AND WON HO LEE

National Institute of Genetics, Mishima 411, Japan

Vol. 30, No. 2.

p. 110, second line: for ‘Avery Period’ read ‘P. J. Avery’.

p. 111, 4 lines from foot of page: formula should read

p. 112, line 4: start of line should read

The contribution of plasmid and host genes to plasmid-mediated interference with phage growth

BY VICTORIA HUGHES AND G. G. MEYNELL

Biological Laboratory, University of Kent, Canterbury, Kent CT2 4tNJ, England

Vol. 30, No. 2.

p. 180, line 12: ‘2000μg streptomycin’ should read ‘200μg streptomycin’.

The basis for an apparent auxotrophy for reduced sulphur metabolites in sF−mutants of Aspergillus nidulans

BY HERBERT N. ARTS, JR.

Department of Genetics, University of Cambridge, Downing Street, Cambridge CB2 3EH, England

Vol. 30, No. 2.

p. 209, note added in proof line 9: ‘does not protect sF-211 strains’ should read ‘does protect sF-211 strains’.