Inducing chromosome pairing through premature condensation: analysis of wheat interspecific hybrids |
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Authors: | Emilie Knight Emma Greer Tracie Draeger Vera Thole Steve Reader Peter Shaw Graham Moore |
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Institution: | (1) John Innes Centre, Colney, Norwich, NR4 7UH, UK; |
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Abstract: | At the onset of meiosis, chromosomes first decondense and then condense as the process of recognition and intimate pairing
occurs between homologous chromosomes. We show here that okadaic acid, a drug known to induce chromosome condensation, can
be introduced into wheat interspecific hybrids prior to meiosis to induce chromosome pairing. This pairing occurs in the presence
of the Ph1 locus, which usually suppresses pairing of related chromosomes and which we show here delays condensation. Thus the timing
of chromosome condensation during the onset of meiosis is an important factor in controlling chromosome pairing. |
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