This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Gardner, E. J. Articles by Gardner, M. D. Search for Related Content PubMed PubMed Citation Articles by Gardner, E. J. Articles by Gardner, M. D.

Further Evidence for Maternal Effect and Modifiers of Tumorous Head Genes in Natural Populations of Drosophila Melanogaster^*

( Utah State Agricultural College, Logan, Utah)

1. Twenty-eight populations from widely scattered geographical locations carried modifiers of genes for tumorous head in different frequencies, whereas in laboratory stocks previously tested such genes were either completely absent or homozygous.

2. Consistently different results in F₁ reciprocal crosses indicated a maternal effect. No difference was detected in the F₂ results of the reciprocal crosses.

^* This investigation was supported in part by the Damon Runyon Memorial Fund and in part by a grant-in-aid from the American Cancer Society upon recommendation by the Committee on Growth of the National Research Council.

Received 3/27/53.