A somatic gene rearrangement contributing to genetic diversity in maize

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Proceedings of the National Academy of Sciences of the United States of America; (USA)

DOI:https://doi.org/10.1073/pnas.87.20.7809· OSTI ID:5770274

Das, O P; Levi-Minzi, S; Koury, M; Benner, M; Messing, J ^[1]

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1. The State Univ. of New Jersey, Piscataway (USA)

The authors 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.

• OSTI ID: 5770274
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America; (USA), Vol. 87:20; ISSN 0027-8424
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
MAIZE
GENE RECOMBINATION
BIOLOGICAL EVOLUTION
DNA HYBRIDIZATION
GENETIC VARIABILITY
RFLPS
BIOLOGICAL VARIABILITY
CEREALS
GRAMINEAE
HYBRIDIZATION
LILIOPSIDA
MAGNOLIOPHYTA
PLANTS
550200* - Biochemistry