Unequal Sister Chromatid and Homolog Recombination at a Tandem Duplication of the a1 Locus in Maize

From: Genetics | Date: August 1, 2006| Author: Yandeau-Nelson, Marna D; Xia, Yiji; Li, Jin; Neuffer, M Gerald; Schnable, Patrick S | Copyright information

ABSTRACT

Tandemly arrayed duplicate genes are prevalent. The maize A1-b haplotype is a tandem duplication that consists of the components, α and β. The rate of meiotic unequal recombination at A1-b is ninefold higher when a homolog is present than when it is absent (i.e., hemizygote). When a sequence heterologous homolog is available, 94% of recombinants (264/281) are generated via recombination with the homolog rather than with the sister chromatid. In addition, 83% (220/264...

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