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- W1995636941 abstract "B chromosome derivatives suffering from breaks within their centromere were examined cytologically and molecularly. We showed by high resolution FISH that misdivision of the centromere of a univalent chromosome can occur during meiosis. The breaks divide the centromere repeat sequence cluster. A telocentric chromosome formed by misdivision was found to have the addition of telomeric repeats to the broken centromere. A ring chromosome formed after misdivision occurred by fusion of the broken centromere to the telomere. Pulsed-field electrophoresis analyses were performed on the telocentric and ring chromosomes to identify fragments that hybridize to both the telomeric repeat and the B-specific centromeric repeat. We conclude that healing of broken maize centromeres can be achieved through the mechanisms of addition or fusion of telomeric repeat sequences to the broken centromere.Key words: centromere, telomere, meiosis, chromosome healing, B chromosome, Zea mays." @default.
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- W1995636941 date "2002-08-01" @default.
- W1995636941 modified "2023-09-25" @default.
- W1995636941 title "Cytological and molecular analysis of centromere misdivision in maize" @default.
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- W1995636941 doi "https://doi.org/10.1139/g02-023" @default.
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