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- W2096261520 endingPage "533" @default.
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- W2096261520 abstract "Abstract Supernumerary or B chromosomes are selfish entities that maintain themselves in populations by accumulation mechanisms. The accumulation mechanism of the B chromosome of maize (Zea mays) involves nondisjunction at the second pollen mitosis, placing two copies of the B chromosome into one of the two sperm. The B chromosome long arm must be present in the same nucleus for the centromere to undergo nondisjunction. A centromere, containing all of the normal DNA elements, translocated from the B chromosome to the short arm of chromosome 9 was recently found to be epigenetically silenced for centromeric function. When intact B chromosomes were added to this genotype, thus supplying the long arm, the inactive centromere regained the property of nondisjunction causing the translocation chromosome 9 to be differentially distributed to the two sperm or resulted in chromosome breaks in 9S, occasionally producing new translocations. Translocation of the inactive B centromere to chromosome 7 transferred the nondisjunction property to this chromosome. The results provide insight into the molecular and evolutionary basis of this B chromosome accumulation mechanism by demonstrating that nondisjunction is caused by a process that does not depend on normal centromere function but that the region of the chromosome required for nondisjunction resides in the centromeric region." @default.
- W2096261520 created "2016-06-24" @default.
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- W2096261520 date "2007-02-01" @default.
- W2096261520 modified "2023-10-15" @default.
- W2096261520 title "Centromere Function and Nondisjunction Are Independent Components of the Maize B Chromosome Accumulation Mechanism" @default.
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- W2096261520 doi "https://doi.org/10.1105/tpc.106.049577" @default.
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