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A Somatic Gene Rearrangement Contributing to Genetic Diversity in Maize

Overview
Journal Proc Natl Acad Sci U S A
Specialty Science
Date 1990 Oct 1
PMID 2235998
Citations 24
Authors
O P Das
S LEVI-MINZI
M Koury
M Benner
J Messing
Affiliations
Soon will be listed here.
Abstract

We have discovered a somatic genomic rearrangement that occurs at high frequency at a duplicated zein locus in certain cultures of the maize inbred line A188. The rearranged allele arises from the duplication by a two-step process involving a homologous recombination and a second event, which may be a deletion, inversion, or insertion; both steps always occur together. The frequency of rearrangement is lower in homozygous states of the parental allele than in heterozygotes. In both cases, the rearrangement is shown to be mitotic. The rearranged product can be transmitted through meiosis, providing another mechanism for genome evolution in higher eukaryotes.

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