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Full-Text Articles in Life Sciences
Distribution And Genetic Structure Of Pocket Gophers (Genus Geomys) In Kansas, Zachary J. Schwenke
Distribution And Genetic Structure Of Pocket Gophers (Genus Geomys) In Kansas, Zachary J. Schwenke
Master's Theses
The development of informed management practices and insightful research depends not only on an understanding of species natural history and ecology, but information regarding the distributions of these species and how they interact with adjacent taxa. The study of a species distribution can become complicated if the geographic variation within the species is not understood. Pocket gophers, including those in the genus Geomys, display morphological and chromosomal variation across their range, even within the same species. Genetic techniques, including Amplified Fragment Length Polymorphism (AFLP), have clarified population relationships and characterized zones of contact. Previous studies have suggested 2 species and …
Determining The Fate Of Hybridized Genomes In The Allopolyploid Brassica Napus, Tina Y. Wang
Determining The Fate Of Hybridized Genomes In The Allopolyploid Brassica Napus, Tina Y. Wang
Master's Theses
Polyploidy is widely acknowledged as a widespread mechanism in the evolution and speciation of the majority of flowering plants. Allopolyploid forms through interspecific hybridization and whole genome duplication. While allopolyploids may display increased vigor relative to their progenitors, they can also face challenges to fertility following hybridization. Genetic changes in allopolyploids result from recombination between the hybridized subgenomes, which can influence phenotype and ultimately determine fitness of future generations. To study dynamic changes that follow allopolyploid formation, Brassica napus lineages were derived by hybridizing Brassica oleracea and Brassica rapa. Two lineages of B. napus were analyzed for genetic and phenotypic …