Essays about: "genetic drift"
Showing result 1 - 5 of 18 essays containing the words genetic drift.
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1. Analysis of relatedness and genetic diversity in Swedish sheep breeds using medium density (50K) SNP data
University essay from SLU/Dept. of Animal Breeding and GeneticsAbstract : The local Swedish sheep breeds belong to a group of sheep breeds known as North European short-tailed sheep breeds. Evaluation of genetic diversity, relatedness, and population structure of local breeds offers crucial metrics to prevent inbreeding depression, genetic erosion, and crossbreeding between locally adapted and exotic sheep breeds since these occurrences can have detrimental effects and ultimately lead to extinction. READ MORE
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2. Drivers of flower size evolution in the selfing species Arabidopsis thaliana
University essay from Uppsala universitet/Institutionen för biologisk grundutbildningAbstract : The influence of pollinators on the evolution of flower morphology has been extensively explored. Yet, the effect of other ecological factors, such as genetic drift, environmental filtering, and allometric constraints, gained less attention. In this study, we addressed the importance of those drivers in a predominantly selfing species. READ MORE
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3. Evolutionary conservation analysis of sequence variants underlying ecological adaptation in Atlantic herring
University essay from Uppsala universitet/Institutionen för biologisk grundutbildningAbstract : The Atlantic herring (Clupea harengus) is a model organism for exploring the genetic basis of ecological adaptation on account of its large effective population size which greatly restrains the disturbance of genetic drift. In this project, I conducted an evolutionary conservation analysis of the Atlantic herring genome using conservation scores generated by phastCon, phyloP and GERP++ in order to study the sequence variants related to salinity or spawning-time adaptation in Atlantic herring. READ MORE
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4. Estimating the effective population size of Swedish native cattle : understanding the demographic trajectories of indigenous Swedish cattle breeds
University essay from SLU/Dept. of Animal Breeding and GeneticsAbstract : The indigenous cattle populations are on the decline globally with the continuous improvement of genetic gains in commercial breeds. Due to their unique adaptive features to the local ecosystem, traditional cattle breeds are pools of valuable genetic resources that could help combat the impact of climate change in the near future. READ MORE
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5. A population genomic approach to investigate potential island effects in the cryptic wood white butterfly (Leptidea juvernica) : Do island populations have lower genetic diversity and less efficient selection than mainland populations?
University essay from Uppsala universitet/Institutionen för biologisk grundutbildningAbstract : Due to limited geographic ranges, island populations, in general, are expected to have smaller population sizes and a limited influx of migrants compared to populations inhabiting continental mainlands. Therefore, island populations are expected to be influenced by genetic drift and natural selection differently from mainland populations. READ MORE
