A Stable Somatic Mutation to Colorless from Variegated Pericarp in Maize.

The Frequency of Somatic Mutation in Variegated Pericarp of Maize.

The genetics of a mutable gene at the white locus of Drosophila melanogaster.

LMOST coincidental with the rediscovery of Mendelism, genes of high sponA taneous mutation rate, often referred to as unstable, labile or mutable genes, were found. Such mutable genes, although not described as such, were identified in association with variegated phenotypes especially noticeable in plants as flower color variegation. R. A. EMERSON (1914, 191 7) from his studies of variegated pe...

The mechanism of modulator transposition in maize.

CCLINTOCK (1956) suggested that a transposable element in maize moves Mfrom the donor site to a different recipient site on the chromosome during the mitotic reduplication process. GREENBLATT and BRINK (1962, 1963) and GREENBLATT (1966) were able to offer experimental support for this idea, and further, developed a working hypothesis of a mechanism of the element's movement. Since the evidence ...

Movement of modulator in maize: a test of an hypothesis.

A model of Modulator movement (Greenblatt 1968) from one chromosomal site to another requires that all movements produce potential twin mutations within the affected cell lineage. From this model the prediction would be that (1) untwinned red and untwinned light-variegated sectors within the pericarp of medium-variegated maize must occur in equal frequency even though partners become lost, duri...

The Relation between Light Variegated and Medium Variegated Pericarp in Maize.

HE present report is based upon a restudy of variegated pericarp in Tmaize, a mutable character which is well known through the important pioneer work of EMERSON (1914, 1917, 1929). The current investigation is concerned primarily with the relation between two distinct phenotypes, light variegated and medium variegated, both of which are unstable, The results obtained, however, bear directly on...