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Keyword: population genetics

Genetic diversity and pathogenicity-related genes of the fungal pathogen associated with oak mortality in South Korea

Projects Posted on: August 20, 2019
Since 2004, extensive mortality of oak (Quercus mongolicae) has been occurring in South Korea. This oak mortality is associated with a fungus (Raffaelea quercus-mongolicae), which is vectored by a wood-boring ambrosia beetle (Platypus koryoensis). High-resolution genetic markers were used to assess the genetic diversity of 54 fungal isolates from five South Korean provinces, and results suggest that this fungal pathogen was introduced to South Korea. Genomic sequencing of the fungus provided evidence of genes associated with causing tree disease, and allowed comparisons with related fungi.

Forb common garden study to inform seed transfer guidance for restoration

Projects Posted on: July 31, 2019
Seed-grown plants from multiple populations of three focal forb species will planted in gardens across the Great Basin in order to capture important information that affects where seeds are sourced for restoring native plants at specific locations.

Twenty-five years after: Post-introduction association of Mecinus janthinus s.l. with invasive host toadflaxes Linaria vulgaris and Linaria dalmatica in North America

Publications Posted on: July 10, 2018
Linaria vulgaris, common or yellow toadflax, and Linaria dalmatica, Dalmatian toadflax (Plantaginaceae), are Eurasian perennial forbs invasive throughout temperate North America. These Linaria species have been the targets of classical biological control programmes in Canada and the USA since the 1960s.

Distribution and genetic diversity of the invasive brown root-rot pathogen (Phellinus noxius)

Science Spotlights Posted on: August 16, 2016
Brown root rot (caused by an invasive pathogen, Phellinus noxius) impacts diverse tree species in tropical and subtropical areas, including eastern/southeastern Asia, Australia, and Pacific islands. Ongoing genetic analyses are determining similarities and differences among pathogens from different areas to better characterize the pathogen, determine potential pathways of spread, and predict geographic areas that are at risk from this invasive pathogen.

Population Genetics of Boise Basin Bull Trout (Salvelinus confluentus)

Publications Posted on: May 12, 2016
We analyzed the population genetic structure of bull trout (Salvelinus confluentus) in the Boise River Basin, Idaho. We determined the influence of contemporary (including anthropogenic) and historic factors on genetic structure, taking into accountexisting data on bull trout habitat patches in this basin.

Center for Landscape Science

Groups Posted on: December 14, 2015

Investigating new threats from emerging invasive plants

Science Spotlights Posted on: October 05, 2015
Forest Service scientists and partners developed an aggressive approach to investigate the biological and habitat characteristics of sickleweed (Falcaria vulgaris), a rapidly expanding invasive plant recently introduced into the grasslands of the northern Great Plains. Documenting patterns of invasion before species becomes widespread and identifying traits that may contribute to the success of recent invaders can increase our knowledge of factors influencing invasibility.

Landscape location affects genetic variation of Canada lynx (Lynx canadensis)

Publications Posted on: April 21, 2015
The effect of a population's location on the landscape on genetic variation has been of interest to population genetics for more than half a century. However, most studies do not consider broadscale biogeography when interpreting genetic data.

Projecting outcomes for high elevation pine populations threatened by a non-native disease

Projects Posted on: December 03, 2014
White pine blister rust (WPBR) is a lethal disease threatening five-needle pine species in the Northern Rocky Mountains. Through the use of mechanistic models, we are developing mitigation and prevention strategies.

From diagnostics to metagenomics: Applications of DNA-based tools in forest pathology

Publications Posted on: October 24, 2013
Advances in molecular technology provide an accessible set of tools to 1) help forest pathologists detect, identify, and monitor forest pathogens, 2) examine the evolutionary relationships and global distributions of forest pathogens and their hosts, 3) assess the diversity and structure of host and pathogen populations, and 4) evaluate the structure and function of genes, as well as their levels of expression, within species and within commun

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