Multiple maize minichromosomes in meiosis.

Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology
R E MasonbrinkJ A Birchler

Abstract

In this study, four distinct minichromosomes derived from the maize B chromosome, were increased in copy number using the B chromosome's accumulation mechanism, namely nondisjunction at the second pollen mitosis and preferential fertilization of the egg. These minichromosomes provide the unique opportunity to examine the behavior of many copies of a single chromosome in an otherwise diploid background. While multiple copies were associated in multivalent configurations, they often dissociated into univalents or bivalents prior to metaphase I. The largest mini's behavior closely resembled the progenitor B chromosome, but all smaller chromosomes showed failure of sister chromatid cohesion. In addition to the meiotic behavior, we observed many anomalies of univalent behavior and possible heterochromatic fusions of B repeat associated heterochromatin.

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Citations

Jan 2, 2016·Current Opinion in Biotechnology·James A BirchlerMorgan E McCaw
Jun 7, 2014·Current Opinion in Plant Biology·James A Birchler
Jan 19, 2015·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·James A Birchler
Jan 28, 2015·Trends in Biotechnology·James A Birchler
May 14, 2017·The Plant Journal : for Cell and Molecular Biology·Xiaohong YanWenhui Wei
Jan 31, 2014·Genetics·Elisabeth BauerlyR Scott Hawley
Jan 24, 2020·Experimental Cell Research·James A Birchler, Nathan C Swyers
Mar 11, 2020·Experimental Cell Research·R Kelly Dawe
Aug 4, 2018·ACS Synthetic Biology·Natalay KouprinaVladimir Larionov
Aug 19, 2021·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Ryan N DouglasJames A Birchler
Nov 4, 2021·Open Biology·James A Birchler, Hua Yang

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