Sökning: "Co-evolution"

Visar resultat 16 - 20 av 48 avhandlingar innehållade ordet Co-evolution.

1. 16. Multivariate Aspects of Phylogenetic Comparative Methods

   Författare :Krzysztof Bartoszek; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; General Linear Model; Ornstein-Uhlenbeck process; Multivariate phylogenetic comparative method; Evolutionary model; Adaptation; Optimality; Measurement error; Regression; Adaptation; Major-axis regression; Reduced major-axis regression; Structural equation; Allometry; Phylogenetic inertia; Allometry;

   Sammanfattning : his thesis concerns multivariate phylogenetic comparative methods. We investigate two aspects of them. The first is the bias caused by measurement error in regression studies of comparative data. We calculate the formula for the bias and show how to correct for it. LÄS MER

3. 17. Microbotryum violaceum on Silene dioica : understanding traits that influence plant-pathogen interactions

   Författare :Åsa Granberg; Barbara E. Giles; Ulla Carlsson-Granér; Arjen Biere; Umeå universitet; []
   Nyckelord :plant-pathogen interaction; biochemical resistance; breeding system; automixis; race specific resistance; extinction-colonisation dynamics; Silene dioica; Microbotryum violaceum;

   Sammanfattning : The dynamics of a plant-pathogen interaction vary both within and among species. Both spatial structuring and specific genetic and life-history characteristics will affect the interaction and the outcome of a potential co-evolution between the two organisms. LÄS MER

4. 18. Innovating beyond Racial Capitalism: A Contribution towards the Analysis of the Political Economy of Post-Apartheid South Africa

   Författare :Rasigan Maharajh; Research Policy Institute (RPI); []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economic History; Innovation Studies; Political Economy; Research Policy; South Africa.;

   Sammanfattning : This dissertation provides an economic history narrative which analyses the accumulation path underpinning the development of racial capitalism in South Africa. The specific objective of this narrative is to analyse the degree to which the adoption of a national system of innovation (NSI) analytical framework by the first post-apartheid government led to science, technology and innovation (STI) policies and strategies, which were appropriate for the development objectives of the new democratic political economy. LÄS MER

5. 19. Understanding the genetic basis of complex traits

   Författare :Yanjun Zan; Örjan Carlborg; Pär Ingvarsson; Uppsala universitet; []
   Nyckelord :genetic architecture; complex traits; epistasis; multi-allelic; genotype by environment interaction; polygenic adaptation; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

   Sammanfattning : Recent advances in genetics and genomics have provided numerous opportunities to study the genetic basis of complex traits. Nevertheless, dissecting the genetic basis of complex traits is still challenged by the complex genetic architecture, in which many genes are involved, and many have small contributions to phenotypic variation, interactions with other genes or environmental factors. LÄS MER

7. 20. Pollination in Ephedra (Gnetales)

   Författare :Kristina Bolinder; Catarina Rydin; Jürg Schönenberger; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; växtsystematik; Plant Systematics;

   Sammanfattning : Pollination, i.e., the transport of male gametophytes to female gametophytes, can occur with biotic or abiotic vectors and is necessary for fertilization and completion of the lifecycle in all seed plants. LÄS MER