Purdue University Graduate School


Turtle species are facing losses to genetic variation caused by habitat fragmentation and large-scale landscape changes caused by humans. These losses to genetic variation disproportionally effect species that have become rare due to human interaction. Spotted Turtle (Clemmys guttata) is one such species that has become rare across a large portion of its natural geographic range including the Midwest. I examined genetic variation in spotted turtles in Indiana and Ohio to delineate populations and assess levels of genetic variation within populations. Eight microsatellite loci were used to genotype 94 individuals, which originated from four sites in Indiana and two sites in Ohio. Bayesian and ordination based cluster analyses identified three genetic clusters within the sample. Individuals from one Ohio locality were largely clustered alone and had a significant degree of differentiation from all of the Indiana sites. A majority of the Indiana sites had individuals that were clustered into both of the two remaining clusters with the exception of IN-1 which only had individuals grouped into the first inferred cluster. The two sites geographically closest to one another IN-2 and IN-4, both had individuals grouped into the first and third inferred clusters. Differentiation statistics disagreed on the level of structure between these two populations. Two of the six sites had detectable bottlenecks, even though levels of genetic allelic diversity and heterozygosity were relatively high and comparable to populations investigated in other studies. Overall, population structure was identified among localities in Indiana and Ohio that may warrant independent management. Populations where the bottlenecks were detected may be of special concern in the future as they continue to be subjected to isolation.

Degree Type

  • Master of Science
  • Biological Sciences

Campus location

Advisor/supervisor/committee chair, additional committee member 2, additional committee member 3, usage metrics.

  • Plant cell and molecular biology
  • Animal cell and molecular biology
  • Population ecology
  • Anthropological genetics
  • Genetics not elsewhere classified
  • Behavioural genetics

CC BY 4.0


  1. Diversity

    genetic diversity thesis

  2. Genetic diversity Definition and Examples

    genetic diversity thesis

  3. AQA Genetic diversity

    genetic diversity thesis

  4. (PDF) Genetic Diversity: Its Importance and Measurements

    genetic diversity thesis

  5. determination of genetic diversity between eggplant and its wild

    genetic diversity thesis

  6. Genetic Diversity Analysis with Molecular Marker Data

    genetic diversity thesis


  1. Episode 10: Diversity in Genetics

  2. SCI-Arc Unscripted: UG Thesis 2023

  3. Three Minute Thesis (3MT) Competition 2010 presentation by Danau Tanu

  4. Borcelle University Thesis Defense Presentation by Estelle Darcy

  5. National Architectural Thesis Competition: 2018-04

  6. Real Coded Genetic Algorithm


  1. (PDF) Genetic Diversity: Its Importance and Measurements.

    Genetic diversity helps to adapt to environmental variability. Organisms live in complex environment that vary in spatial and temporal scale and. is characterized by several factors such as ...

  2. Determinants of genetic diversity

    Romiguier, J. et al. Comparative population genomics in animals uncovers the determinants of genetic diversity. Nature 515, 261-263 (2014). This study shows a comparative analysis of patterns of ...

  3. A global synthesis of the patterns of genetic diversity in endangered

    1. Introduction. Genetic diversity (GD) is essential for populations persistence, increasing their evolutionary potential (Lavergne and Molofsky, 2007; Laikre et al., 2020).Populations with high GD tend to have a higher adaptive potential to cope with changing environments (Markert et al., 2010; Ellegren and Galtier, 2016), which is becoming increasingly important in the context of global ...

  4. PDF Genetic History of Latin America: Fine-scale population structure, sub

    Genetic History of Latin America: Fine-scale population structure, sub-continental ancestry and phenotypic diversity A Thesis submitted for the Degree of Doctor of Philosophy Author: Juan Camilo Chacón-Duque Supervisors: Dr Garrett Hellenthal Prof Andrés Ruiz-Linares Department of Genetics, Evolution and Environment University College London

  5. PDF Minimal effects to genetic diversity and population structure in seven

    editing, commenting, and offering advice on my thesis. A huge thank you to Dave Rowe and Nate Nye, employees of the Wisconsin Department of Natural Resources (WIDNR), for being so instrumental in designing this project, helping carry ... reduced genetic diversity and effective population sizes (Yamamoto et al. 2004; Blanchet et al. 2010 ...

  6. PDF Genetic Variation and Human Evolution

    Perhaps the most widely cited statistic about human genetic diversity is that any two humans differ, on average, at about 1 in 1,000 DNA base pairs (0.1%). Human genetic diversity is substantially lower than that of many other species, including our nearest evolutionary relative, the chimpanzee. Genetic diversity is a function of a population's


    A rectangular data set was first created from the SSR data in Microsoft. Excel (Microsoft Corp.) with the alleles as the rows, and the accessions as the columns, using "1" for presence of an allele and "0" for absence. Dice coefficient for similarity and UPGMA clustering were chosen to create a dendrogram of the data.

  8. Genetic Diversity: Sources, Threats, and Conservation

    Genetic diversity is a fundamental source of biodiversity which has been defined by different authors as "any measure that quantifies the ... Nonić M (2016) Improving mass production of leaf-ornamental beech cultivars by grafting. Doctoral thesis, University of Belgrade - Faculty of Forestry, 280 pages. Google Scholar NRC - National ...

  9. (PDF) Genetic diversity

    Thesis. Full-text available. Oct 2020; Achyuta Basak; ... Genetic diversity analysis is an important component in conventional and marker-assisted breeding. The objective of this study was to ...

  10. Genetic diversity, population structure, and relationships in a

    Genetic diversity and relationships of a subset of 148 accessions, of which a complete passport information was available, was studied using principal components analysis (PCA), discriminant ...


    2 THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE As members of the Master's Committee, we certify that we have read the document prepared by Rebecca Coleman, titled Diversity, Equity, Inclusion, and Justice in Genetic Counseling: a Focus on Indigenous Peoples and recommend that it be accepted as fulfilling the thesis requirement for the Master's Degree in Genetic Counseling.

  12. Genetic Diversity, Conservation, and Utilization of Plant Genetic

    Genetic diversity helps breeders to maintain the crossbred varieties, which leads to sustaining the desirable traits of the varieties, such as quality characteristics and tolerance to various stresses. In general, plant genetic resources (PGRs) are the total hereditary material, which includes all the alleles of various genes, present in a crop ...

  13. Analysis of Genetic Diversity and Population Structure of Cowpea

    The genetic diversity parameters analysis was conducted using 5864 (49%) SNPs that remained after filtering out monomorphic and minor allele frequencies of less than 2%. The number of polymorphic SNPs per chromosome ranged from 345 on chromosome 1 to 668 on chromosome 3 with an overall mean of 488 per chromosome. The proportion of polymorphic ...


    GENETIC DIVERSITY AMONG ELITE MAIZE(Zea mays L.) INBRED LINES USING SIMPLE SEQUENCE REPEAT MARKERS ... This thesis has been submitted in partial fulfillment for the requirement of an advanced MSc degree at Jimma University and is deposited at the University Library to be made ...

  15. Evaluation of Genetic Diversity in Wheat Cultivars and Breeding Lines

    Analysis of genetic relationships in crops is a prerequisite for crop breeding programs, as it serves to provide information about genetic variation (10). lack of genetic diversity can potentially lower the resistance of cropping systems to unknown or evolving pests, pathogens, or adverse environmental conditions.

  16. PDF Genetic Variability and Associations of Traits in Indigineous and

    By my signature below, I declare and confirm that this thesis is my work and all sources of materials used for this thesis has been acknowledged. I have followed all proper and technical principles of scholarships in the research, data collection, data analysis and accomplishment of this thesis.

  17. What Is Genetic Diversity and Why Does it Matter?

    Gene: ↑ A section of DNA that contains the instructions for a trait. Genetic Diversity: ↑ The overall diversity in the DNA between the individuals of a species. Mutation: ↑ A change in an organism's DNA. This can be a change of a single letter or a much bigger change of hundreds of letters at once.


    GENETIC DIVERSITY OF SPOTTED TURTLE (CLEMMYS GUTTATA) POPULATIONS IN A FRAGMENTED LANDSCAPE. Download (913.66 kB) + Collect. thesis. posted on 2019-10-16, 10:18 authored by Tyler J Scoville. Turtle species are facing losses to genetic variation caused by habitat fragmentation and large-scale landscape changes caused by humans.

  19. Genomic indicators of diversity in Austrian horse populations

    crucial for the survival of a breed. A decline in genetic diversity can result in a higher disease susceptibility and a reduction of production traits. A closer examination of the term "genetic diversity" is conducted in Chapter 2.2 of this thesis and further specifications regarding equine genetic diversity are included as well.


    2.6. Genetic Diversity in Sorghum 11 2.7. Genetic Variability Components 13 2.7.1. Genotypic and phenotypic variability 13 2.7.2. Phenotypic and genotypic coefficients of variability 14 2.8. Heritability and Genetic Advance 14 2.9. Correlation Coefficient 15 2.10. Path Coefficient Analysis 17 2.11. Genetic Distance and Clustering 18


    Gudeta Dida Hordofa have read and evaluated his thesis entitled "Genetic Diversity of Ethiopian Coffee (Coffea arabica L.) Collection Using SSR Marker" and examined the candidate. This is therefore to certify that the thesis has been accepted in partial fulfillment of the requirements for the degree of Master of Science in Plant Biotechnology.

  22. PDF Genetic Varition and Diversity Thesis

    The thesis has been submitted for examination with our approval as University supervisors Signed Date 4 / 10 / 11 Professor Patrick R. Rubaihayo Department of Agricultural Production, College of Agricultural and Environmental Sciences, Makerere ... Genetic Diversity in White- and Orange-fleshed Sweetpotato Farmer Varieties from

  23. Genetic Diversity and Its Impact in Enhancement of Crop Plants

    Citation: Temesgen Begna, Hayilu Gichile and Werkissa Yali (2022) Genetic Diversity and Its Impact in Enhancement of Crop Plants, Global Journal of Agricultural Research , Vol.10, No.2, pp.13-25 Plant breeding is a science that focuses on the development of new plant varieties in a systematic and ongoing method. It takes advantage of genetic variation among … Genetic Diversity and Its Impact ...

  24. A Sacred Evolutionary Cosmos: Philip Sherrard, Theodosius Dobzhansky

    3 Martin Heidegger, "The Question Concerning Technology," in The Question of Technology and Other Essays, ed. Martin Heidegger, trans. William Lovitt (New York: HarperCollins, 1977), 17. ... 74 Dobzhansky, Genetic Diversity and Human Equality, 115. 75 Lewis Mumford, The Condition of Man (New York: Harcourt Brace Jovanovich, 1973), vii.