Nucleotide Polymorphism, Linkage Disequilibrium and Complex Trait Dissection in Populus

Part of the Plant Genetics and Genomics: Crops and Models book series (PGG, volume 8)


Poplars and aspens often have very wide geographic distributions, large population sizes and are often highly outcrossing. These life history traits should promote the maintenance of abundant levels of genetic variation in trees and early data based on allozyme diversities also confirm these expectations. However, investigation of variation at the nucleotide level has only recently begun in Populus. Surveys of nucleotide polymorphism in Populus have shown relatively high levels of synonymous diversity, between 0.5–1%. Levels of linkage disequilibrium is also relatively low in Populus, although there seems to be large differences between species. The observations of low levels of LD in Populus are so far confined to coding regions and levels of LD non-genic regions is still uncharacterized. Nevertheless, these features suggest that very fine scale mapping is possible in Populus. In principle using recently developed methods in association mapping it should therefore be possible to map quantitative trait variation down to single causal nucleotide changes in Populus.


Mapping Population Effective Population Size Association Mapping Segregation Distortion Significant Segregation Distortion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



I am grateful to the Swedish Research Council (VR) for funding and to S. Jansson and A. Groover for comments on an earlier version of the manuscript.


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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of Ecology and Environmental ScienceUmeå Plant Science Centre, Umeå UniversityUmeåSweden

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