Degree Type

Dissertation

Date of Award

1987

Degree Name

Doctor of Philosophy

Department

Agronomy

First Advisor

Peter A. Peterson

Abstract

An unstable bronze mutable allele, bz-m 826301, arose by the insertion of the Enhancer, En, element from a population previously known to have contained active Enhancer elements. Mutability of bz-m 826301 is regulated by an autonomous En element residing at the bronze locus. In the absence of En, the mutant conditions a null, bronze phenotype in the kernel. In the presence of En, however, the mutant conditions numerous fully colored spots on a bronze background;The original bz-m 826301 isolate was recovered at the rate of 1 in 6 x 10[superscript] -5. The primary family of the mutant generated derivative alleles some of which have lost their ability to mutate autonomously; others with altered spotting patterns, either reduced number (changes of state) or varied tissue specificity (changes of phase) that reflect alterations in the frequency and timing of the transposition of the insert have been recovered.

DOI

https://doi.org/10.31274/rtd-180813-11611

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Guru murti Natarajan

Language

en

Proquest ID

AAI8805120

File Format

application/pdf

File Size

196 pages

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