THE PALE GREEN MUTABLE SYSTEM IN MAIZE

Mutable Loci In. Maize

MUTABLE LOCI IN MAIZE t,

Previous reports have stated that a number of unstable loci have recently arisen in the maize cultures. In a particular cell of a plant, a normal “wild-type” locus becomes altered; the normal, dominant expression of this locus changes and gives rise to a recessive expression (or, in several cases, a recessive locus becomes unstable and mutates toward a dominant expression). This expression of t...

A mutable luteus locus in maize

The origin and behavior of mutable loci in maize.

per cent. Other experiments have been performed to determine whether the oxygen effect is exerted by way of the initial breakage mechanism or on the reunion process. These consisted of comparative exposures to a single dose of 300 r in one minute of inflorescences in a vacuum or in oxygen with the addition or removal-of oxygen either immediately after or during part of the irradiation period. I...

The action of a chemical mutagen on a mutable system in maize.

The A1 locus in maize controlling anthocyanin pigmentation along with a few other loci, shows an interesting behaviour in that while some alleles like a1, am are highly mutable and mutate to the dominant A1 state in the presence of the non-allelic Dt gene, others like alt are highly stable and would not respond to the action of Dt. The a1-Dt system first studied by Rhoades (1938) and more recen...