Browsing Biological Sciences electronic theses and disserations (MU) by Thesis Advisor "Birchler, James A. (James Arthur), 1950-"
Now showing items 1-9 of 9
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Centromere function and evolution in maize (Zea mays)
(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 ... -
Development of an amenable system for site-specific addition to a maize chromosome
(University of Missouri--Columbia, 2019)Currently, transgenic maize is produced by random integration of a transgenes into the plant. This works for single genes, but not as well for multiple traits. Identifying plants that contain several transgenes becomes a ... -
The effects of aneuploidy on gene expression in a dosage series of maize chromosome arm 1L /
(University of Missouri--Columbia, 2017)Aneuploidy is a class of genetic conditions involving an unbalanced number of chromosomes. The most familiar human aneuploid condition is trisomy 21, called Down syndrome. Aneuploid conditions necessarily involve a change ... -
Establishing a foundation for large DNA transfer to artificial minichromosomes and B insert platforms in maize
(University of Missouri--Columbia, 2019)In plants, conventional genetic engineering methods limit the number of available traits that could potentially improve the quality of agriculture. Agrobacterium-mediated transformation and biolistic bombardment are tools ... -
Interaction of RNA polymerase II and the RNA silencing machinery in heterochromatin formation of Drosophila
(University of Missouri--Columbia, 2008)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The eukaryotic chromosome is composed of two structurally and functionally distinct compartments. The loosely packaged region is known as the euchromatin, ... -
The interploidy hybridization barrier in Zea Mays L.
(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
(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 ... -
A multifaceted approach to improving transgenic technology in maize
(University of Missouri--Columbia, 2017)Due to a rising world population, scientists must develop new techniques to produce more food. One of these techniques, transgenics, has been around for over two decades however has not been improved at the rate required ... -
Transfer of chromosomes through haploid induction in maize (Zea mays
(University of Missouri--Columbia, 2017)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The B chromosome (B) of maize (Zea mays) is a supernumerary chromosome with no essential genes, no phenotypic effect at low copy number, and survives ...