Emerging Model Species for Developmental, Evolutionary and Functional Analyses
Groover, Andrew .
Populus as a model genus of angiosperm trees.
Forest trees underpin some of the world’s most vital ecosystems and present extreme forms of development and life histories. Yet little is known about the regulation of the fundamental processes underlying their development, physiology, and responses to the environment. The genus Populus includes poplars, aspens, and cottonwoods, and is being developed as a model angiosperm tree genus. An array of tools is available for Populus, including efficient transformation and propagation, pedigrees and natural populations characterized by large amounts of genetic variation, and more recently genomics resources. Combined with the recently completed sequence of Populus trichocarpa, rigorous studies addressing the evolution and molecular genetic regulation of traits associated with long term perennial growth are underway. Some insights come from the genome sequence directly, including the potential selective retention of duplicated genes involved in processes of importance to long lived tree species, and slowing of the molecular clock as a result of persistence of individual clones over hundreds of years. An emerging theme in Populus research is the cooption of genes and mechanisms in the evolution of pathways regulating traits associated with trees, including dormancy during perennial growth, and the maintenance of stem cells in the vascular cambium that supports woody growth.
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1 - USDA Forest Service, Institute of Forest Genetics, 1100 West Chiles Rd, Davis, California, 95616, USA
plant growth and development.
Presentation Type: Symposium or Colloquium Presentation
Location: Stevens 1/Hilton
Date: Monday, July 9th, 2007
Time: 10:30 AM