Germinal excisions of the maize transposon activator do not stimulate meiotic recombination or homology-dependent repair at the bz locus

Double-strand breaks have been implicated both in the initiation of meiotic recombination in yeast and as intermediates in the transposition process of nonreplicative transposons. Some transposons of this class, notably P of Drosophila and Tc1 of Caenorhabditis elegans, promote a form of homology-de...

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Bibliographic Details
Published in:Genetics (Austin) 1997-12, Vol.147 (4), p.1923-1932
Main Authors: Dooner, H.K. (Rutgers University, Piscataway, NJ.), Martinez-Ferez, I.M
Format: Article
Language:English
Subjects:
ADN
ALEURONE LAYER
ALLELES
AMINO ACID SEQUENCES
BRONZE LOCUS
CAPA DE ALEURONA
Cell division
CHEMICAL COMPOSITION
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
Corn
COUCHE A ALEURONE
DNA
DNA REPAIR
DNA Transposable Elements
DNA, Plant
DUPLICATION
FREQUENCY
GENE
GENES
Genes, Plant
GENETIC CHANGE
GENETICA
GENETICS
GENETIQUE
HETEROCIGOTOS
HETEROZYGOTE
HETEROZYGOTES
Investigations
LOCI
LOCUS
MEIOSE
MEIOSIS
Meiosis - genetics
Multigene Family
MUTACION
Mutagenesis
MUTATION
NUCLEOTIDE SEQUENCE
PIGMENTACION
PIGMENTATION
RECOMBINACION
RECOMBINAISON
RECOMBINATION
Recombination, Genetic
Repetitive Sequences, Nucleic Acid
REVERSION
SECUENCIA NUCLEOTIDICA
Sequence Analysis, DNA
SEQUENCE NUCLEOTIDIQUE
TRANSPOSABLE ELEMENTS
TRANSPOSITION
ZEA MAYS
Zea mays - genetics
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Description
Summary:Double-strand breaks have been implicated both in the initiation of meiotic recombination in yeast and as intermediates in the transposition process of nonreplicative transposons. Some transposons of this class, notably P of Drosophila and Tc1 of Caenorhabditis elegans, promote a form of homology-dependent premeiotic gene conversion upon excision. In this work, we have looked for evidence of an interaction between Ac transposition and meiotic recombination at the bz locus in maize. We find that the frequency of meiotic recombination between homologues is not enhanced by the presence of Ac in one of the bz heteroalleles and, conversely, that the presence of a homologous sequence in either trans (homologous chromosome) or cis (tandem duplication) does not promote conversion of the Ac insertion site. However, a tandem duplication of the bz locus may be destabilized by the insertion of Ac. We discuss possible reasons for the lack of interaction between Ac excision and homologous meiotic recombination in maize.
ISSN:0016-6731
1943-2631
1943-2631
DOI:10.1093/genetics/147.4.1923