Show simple item record

dc.contributor.supervisor Marcus, Jeffrey (Biological Sciences) en_US
dc.contributor.author Abbasi, Roohollah
dc.date.accessioned 2015-12-18T15:19:50Z
dc.date.available 2015-12-18T15:19:50Z
dc.date.issued 2015-01-28 en_US
dc.date.issued 2015-08-26 en_US
dc.identifier.citation Abbasi, R., and J. M. Marcus. "Color Pattern Evolution in Vanessa Butterflies (Nymphalidae: Nymphalini): Non-Eyespot Characters." Evol. Dev. DOI: 10.1111/ede.12109 17.1 (2015a): 63-81. en_US
dc.identifier.citation Abbasi, R., and J. M. Marcus. "Colour Pattern Homology and Evolution in Vanessa Butterflies (Nymphalidae: Nymphalini): Eyespot Characters." J. Evol. Biol.: Doi:10.1111/jeb.12716 28 (2015b): 2009-26. en_US
dc.identifier.uri http://hdl.handle.net/1993/30979
dc.description.abstract The evolution and development of eyespot and non-eyespot colour pattern elements was studied in Vanessa butterflies using a phylogenetic approach. A Bayesian phylogeny of the genus Vanessa was reconstructed from 7750 DNA base pairs from 10 genes. Twenty-four non-eyespot and forty-four eyespot color pattern elements from the Nymphalid ground plan were defined and studied and their evolutionary history was traced on the Vanessa phylogeny. Ancestral character states were predicted and the direction of evolutionary changes was inferred for all characters. Five serially arranged eyespots were predicted for the ancestral Vanessa on all wing surfaces. Homologous eyespot and non-eyespot characters on the surfaces of the forewing were more similar than those on the surfaces of the hindwing. Homologous eyespot characters on the dorsal surfaces of fore and hindwings show more similarities than the ventral surfaces, in contrast to what was found for non-eyespot characters. Independent Contrast analysis was also used to study correlations between eyespot characters. Independent Contrast analysis revealed significant correlations between eyespots 2 and 5 and eyespots 3 and 4 on all wing surfaces. This consistency among highly variable eyespot characters suggested a structural hypothesis: the existence of a Far-Posterior (F-P) compartment boundary and organizer could be responsible for the observed correlations. This hypothesis was tested in several ways. First, examination of wing patterns across species from all families of butterflies revealed correspondence between wing cells 1 and 4 and between cells 2 and 3. Second, evaluation of spontaneous mitotic clones in butterflies and moths reveals a peak abundance of clonal boundaries along the vein dividing wing cells 2 and 3. Finally, experimentally generated FLP/FRT mitotic wing clones produced in Drosophila, reveal a clonal boundary posterior to the L5 wing vein, which is homologous to the vein dividing wing cells 3 and 4 in butterflies. Collectively, this suggests the existence of an additional compartment boundary associated with an organizer in wing cell 3 responsible for patterning the posterior portion of insect wings. A model is proposed that predicts that the wing developmental compartment boundaries produce unique combinations of gene expression for each wing sector, permitting eyespot individuation. en_US
dc.publisher John Wiley & Sons Publishers en_US
dc.subject Colour pattern evolution en_US
dc.subject Vanessa butterflies en_US
dc.subject Eyespot development en_US
dc.subject Butterfly wing en_US
dc.subject Drosophila en_US
dc.subject Compartment boundary en_US
dc.subject Mirror-image developmental organizer en_US
dc.subject Serial homology en_US
dc.subject Colour pattern development en_US
dc.subject Far-Posterior compartment boundary en_US
dc.title Colour pattern evolution and development in Vanessa butterflies en_US
dc.degree.discipline Biological Sciences en_US
dc.contributor.examiningcommittee Whyard, Steve (Biological Sciences) Docker, Margaret (Biological Sciences) Sharanowski, Barbara (Entomology) Sperling, Felix (University of Alberta) en_US
dc.degree.level Doctor of Philosophy (Ph.D.) en_US
dc.description.note February 2016 en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

View Statistics