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Genetic Basis Of Adaptive Radiation In East African Cichlids, Richard Craig Albertson
Genetic Basis Of Adaptive Radiation In East African Cichlids, Richard Craig Albertson
Doctoral Dissertations
East African cichlids are a paramount example of adaptive morphological radiation. The most dramatic difference among species occurs in oral jaw design and correlates with ecological niche partitioning. Convergent evolution of trophic forms between lakes suggests a common mechanism. What combination of intrinsic and extrinsic factors constitute this mechanism still remains to be seen. The goal of this dissertation was to examine the genetic basis of shape differences between two closely related cichlid species that employ alternate modes of feeding. This was achieved through a number of independent experiments. First, I used field data to characterize the way in which …
The Effects Of Erythrocyte Alloantigen L On The Avian Immune Response, Zdravka Ognyanova Medarova
The Effects Of Erythrocyte Alloantigen L On The Avian Immune Response, Zdravka Ognyanova Medarova
Doctoral Dissertations
Experiment 1 examined the alloantigen system L effects on Rous sarcomas in three B complex genotypes. The parental stock were 50% Modified Wisconsin Line 3 and 50% inbred Line 6.15- 5. B2B5 L1L2 x B2B5 L 1L2 matings produced experimental chicks. Chicks were inoculated with 20 pock-forming units (pfu) Rous sarcoma virus (RSV) at 6 weeks-of-age. Tumors were scored six times over 10 weeks postinoculation. Tumor scores were used to assign a tumor profile index (TPI) to each chicken. Results were evaluated by ANOVA. The B complex affected the responses. Separate analyses revealed L system effects ( P < 0.05) only in B5B 5 chickens.
Experiment 2 …
Evolution Of Gender Associated Mitochondrial Dna In Bivalves, Jason Paul Curole
Evolution Of Gender Associated Mitochondrial Dna In Bivalves, Jason Paul Curole
Doctoral Dissertations
Bivalves of the families Unionidae and Mytilidae possess a unique mode of mitochondrial DNA inheritance dubbed sex-limited mitochondrial DNA (mtDNA) inheritance or doubly-uniparental inheritance (DUI). In contrast to the matrilineally restricted inheritance of mtDNA in other metazoans, these bivalves have both matrilineally and patrilineally inherited mtDNA lineages. Although the matrilineally inherited mtDNA (or F type) is present in the somatic tissues of both sexes and the female gonad, the patrilineally inherited mtDNA (or M type) is limited to the male gonad. In Mytilus several observations have been made concerning the evolution of DUI. Firstly, the fidelity of DUI is not …