Control of the Frequency of Reversion of the Mutable Alleles at the opaque2 Locus by the Bg-rbg System of Transposable Elements in Maize

Control of the Frequency of Reversion of the Mutable Alleles at the opaque2 Locus by the Bg-rbg... Maize lines differing in the frequency of reversion of the opaque2 (o2) mutable alleles controlled by the Bg-rbg system of transposable elements were studied. In the presence of the Bg regulatory element, these alleles can revert to normal. When reversion occurs prior to the first division of the primary endosperm nucleus, phenotypically normal kernels or whole endosperm revertants (WER) develop. It was shown that the low frequency of formation of whole endosperm revertant may be produced by different genetic mechanisms. The frequency of WER formation was shown to nonlinearly depend on the dose of the Bg-hf regulatory element. A dose increase from two to three failed to cause an essential increase in the number of revertants. The regulatory elements Bg-lf andBg-hfdiffered in their ability to induce excision of the receptor element at the same dose. The frequency of reversion of the receptive alleles was shown to be regulated by epigenetic mechanisms so that high frequency of reversion of receptive alleles requires preliminary premeiotic association between the regulatory and receptor elements. The inheritance of the maize alleles o2-hfand o2-lf proved to be similar to that of an3 mutable alleles in petunia. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Control of the Frequency of Reversion of the Mutable Alleles at the opaque2 Locus by the Bg-rbg System of Transposable Elements in Maize

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2003 by MAIK “Nauka/Interperiodica”
Subject
Biomedicine; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1023/A:1024449608760
Publisher site
See Article on Publisher Site

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