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dc.contributor.authorDesai, Aparna
dc.date.accessioned2014-03-03T23:12:44Z
dc.date.available2014-03-03T23:12:44Z
dc.date.issued2005-05
dc.identifier.otherdesai_aparna_200505_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/desai_aparna_200505_ms
dc.identifier.urihttp://hdl.handle.net/10724/22335
dc.description.abstractScientific information on the A genome species of Gossypium is limited due to their decline as crop species and low levels of marker polymorphism. As the A subgenome of the allotetraploid species of Gossypium is contributed by A genome progenitors, studies on the A genome will help us understand the evolution of polyploids. We compared DNA marker order along the chromosomes of A, D and At genomes of Gossypium by constructing a comprehensive A genome RFLP linkage map from an interspecific F2 population of G. arboreum x G. herbaceum. Chromosomal structural rearrangements are more pronounced among A and At than A and D genomes, perhaps owing to the higher level of repetitive DNA in A and At genomes. We also compared QTL governing the floral morphological variation among diploid and tetraploid interspecific F2 populations. Our study indicated possible silencing and subfuntionalization of homeologous QTL in the tetraploid genome. Index words: Comparative mapping, comparative QTL mapping, genome evolution, Gossypium, homeologs, inversions, intergenomic interactions, orthologs, petal spot, polyploidy, RFLP, subfunctionalization, translocations, tetraploid subgenomes. COMPARISON OF DNA MARKER ORDER AND FLORAL TRAIT EVOLUTION AMONG DIPLOID AND TETRAPLOID GENOMES OF GOSSYPIUM by APARNA DESAI B.Sc. Agriculture, Acharya N. G. Ranga Agricultural University, A.P., India, 1996 A Thesis Submitted to the Graduate Faculty of The University of Georgia in Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE ATHENS, GEORGIA 2005
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectComparative mapping
dc.subjectcomparative QTL mapping
dc.subjectgenome evolution
dc.subjectGossypium
dc.subjecthomeologs
dc.subjectinversions
dc.subjectintergenomic interactions
dc.subjectorthologs
dc.subjectpetal spot
dc.subjectpolyploidy
dc.subjectRFLP
dc.subjectsubfunctionalization
dc.subjecttranslocations
dc.subjecttetraploid subgenomes
dc.titleComparison of DNA marker order and floral trait evolution among diploid and tetraploid genomes of Gossypium
dc.typeThesis
dc.description.degreeMS
dc.description.departmentAgronomy
dc.description.majorAgronomy
dc.description.advisorPeng W. Chee
dc.description.committeePeng W. Chee
dc.description.committeeAndrew H. Paterson
dc.description.committeeO. Lloyd May


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