• Centromere function and evolution in maize (Zea mays) 

    Lamb, Jonathan C., 1977- (University of Missouri--Columbia, 2006)
    A dispensable supernumerary chromosome present in maize, the B chromosome, was the focus of many centromere studies. First, I examine the variation in copy number of centromeric elements and other repeats among different ...
  • Interaction of RNA polymerase II and the RNA silencing machinery in heterochromatin formation of Drosophila 

    Kavi, Harsh (University of Missouri--Columbia, 2008)
    Heterochromatin is thought to be formed by transcription via RNA Pol II of aberrant/repeated regions such as those found in the centromeric regions that enter into the RNAi silencing pathway and guide chromatin modifications ...
  • The interploidy hybridization barrier in Zea Mays L. 

    Bauer, Matthew J., 1976- (University of Missouri--Columbia, 2006)
    The failure of endosperm development due to interploidy crosses could be due to two reasons, neither of which has been studied on its own. 1) There is an imbalance of inherited imprinted loci in the endosperm (HAIG and ...
  • An investigation of maize B chromosome-derived minichromosomes 

    Masonbrink, Rick (University of Missouri--Columbia, 2012)
    The maize (Zea mays) B chromosome is a supernumerary chromosome with a selfish inheritance characterized by nondisjunction at the second pollen mitosis, univalent survival in meiosis, and preferential fertilization of the ...