Essays about: "genetic adaptation"

Showing result 1 - 5 of 22 essays containing the words genetic adaptation.

  1. 1. Genetic diversity and hardiness in Scots pine from Scandinavia to Russia

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Jenny Olsson; [2019]
    Keywords : Pinus sylvestris; recolonization history; genetic diversity; cold hardiness; clinal variation;

    Abstract : The postglacial recolonization of northern Europe supposedly originated from Western Europe and the Russian Plain, however, recent molecular and macrofossil-based investigations suggest that the history may be more complex than previously thought. This study aims to investigate the genetic diversity and population structure of Scots pine from Scandinavia to Russia to re-evaluate its recolonization history, and to examine whether the pattern of spatial genetic diversity has any adaptive significance. READ MORE

  2. 2. Evolutionary history and local adaptation in Scottish populations of Populus tremula

    University essay from SLU/Dept. Of Plant Biology

    Author : Jonathan R. Wilson; [2019]
    Keywords : local adaptation; population structure; selective sweep; synteny;

    Abstract : From a subset of P. tremula samples taken from across Europe and China, principal component analysis of genetic variation indicated population structure in the Scottish population compared with the rest of Eurasia. READ MORE

  3. 3. Biodiversity in assisted migration trials : a study comparing the arthropod diversity between different populations of cottonwood (Populus Fremontii) translocated to new areas

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Maria Noro Larsson; [2018]
    Keywords : assisted migration; biodiversity conservation; arthropods; climate change;

    Abstract : This study aims at investigating how diversity and community structure of arthropods are affected by assisted migration of foundation species. This is proposed to counter biodiversity loss in the tracks of climate change. By focusing on foundation species, a larger quantity of biodiversity could be protected. READ MORE

  4. 4. The Basis of Reproductive Isolation Between Ecologically Divergent Host Plant Races

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Emma Kärrnäs; [2018]
    Keywords : Biology and Life Sciences;

    Abstract : Insects and their host plants constitute a considerable proportion of the diversity on earth, and host shifts hence provide excellent study systems to study the process that drive diversification. In this study, I address what the mechanism to achieve assortative mating is in two host races using different host plants to increase our understanding of how reproductive isolation can arise in the face of ecological specialization. READ MORE

  5. 5. Investigation of pollen limitation, inbreeding and outbreeding depression and heterosis in Euphrasia stricta var. suecica on Gotland

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Emelie Nilsson; [2017]
    Keywords : Pollen limitation; inbreeding depression; outbreeding depression; heterosis; Euphrasia stricta var. suecica; selfing; conservation;

    Abstract : Habitat fragmentation is one of the main threats to semi-natural grasslands all over Europe, causing reductions in both numbers of populations and numbers of individuals withinpopulations. Small isolated populations are particularly vulnerable to fluctuations that reducespopulation size and could lead to loss of genetic variation due to inbreeding depression, orfixation of harmful alleles due to genetic drift. READ MORE