Date of Award
2013
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Biological Sciences
Committee Chair
Luciano M. Matzkin
Committee Member
Bruce W. Stallsmith
Committee Member
Luis R. Cruz-Vera
Subject(s)
Drosophila mojavensis., Plant genomes.
Abstract
Relationships between an organism and its environment are important in understanding how species evolve. One way of looking at this relationship is by examining what genes show evidence of positive selection. This study analyses the changes on protein-coding genes in response to host adaptation. Drosophila mojavensis is a cactophilic fly in that both larval and adult forms develop or feed in necrotic cactus. Four populations of this species each specialize on a different cactus host species. Illumina sequencing was performed on three populations and template assembled to the reference genome of the fourth. Rates of protein evolution were determined for all loci using a several approaches. Genes with evidence of positive selection were linked to the functions of metabolic process, reproduction, and response to stimulus. Results of this study give insight into host adaptation and the beginnings of speciation.
Recommended Citation
Allan, Carson W., "Genome wide search for positive selection on protein-coding genes between cactus host races of Drosophila mojavensis" (2013). Theses. 6.
https://louis.uah.edu/uah-theses/6