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- W1973182882 abstract "The <i>Ph1</i> locus on chromosome 5B enforces strictly bivalent pairing in polyploid wheat, but the exact mechanism of its action remains unknown. Pairing restriction involves not only wheat homoeologues and all alien introgressions but also differentiated homologues. In this study we show that chromosome 5B with its <i>Ph1</i> locus also controls chromosome pairing in autotetraploid rye by apparently restricting chiasma formation between dissimilar homologues. Unlike in wheat, the effect appears to be dosage-dependent, which may be a reflection of an interaction between <i>Ph1</i> and the rye chromosome pairing control system. With 2 doses of <i>Ph1</i> present, chiasmate pairing was severely restricted resulting in a significantly higher number of univalents and bivalents per cell than in the controls. The restrictions imposed by <i>Ph1</i> virtually eliminated MI pairing of chromosome arms polymorphic for their C-band patterns and did not appear to affect arms with similar patterns. If the polymorphism for C-bands is taken as a measure of the overall chromosome similarity/divergence, such differences were recognized and acted upon by the <i>Ph1</i> locus. The fact that <i>Ph1</i> operates in rye in the same fashion as in polyploid wheats suggests that it controls some basic mechanism of chromosome recognition." @default.
- W1973182882 created "2016-06-24" @default.
- W1973182882 creator A5008248694 @default.
- W1973182882 creator A5032578926 @default.
- W1973182882 date "2010-01-01" @default.
- W1973182882 modified "2023-09-26" @default.
- W1973182882 title "The <i>Ph1</i> Locus from Wheat Controls Meiotic Chromosome Pairing in Autotetraploid Rye (<i>Secale cereale</i> L.)" @default.
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- W1973182882 doi "https://doi.org/10.1159/000314279" @default.
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