| |
| Web URL(s): | https://turf.rutgers.edu/research/abstracts/symposium2013.pdf#page=44
Last checked: 03/03/2017
Requires: PDF Reader
Notes: Item is within a single large file |
|---|
| Publication Type:
| Report |
|---|
| Author(s): | Njambere, Evans N.;
Wong, Frank P.;
Zhang, Ning |
|---|
| Author Affiliation: | Njambere and Zhang: Department of Plant Biology and Pathology, Rutgers University; Wong: Bayer Environmental Science |
|---|
| Title: | Cryptic population genetic structure of Waitea circinata var. circinata infecting turfgrass |
|---|
| Section: | Poster presentations
Other records with the "Poster presentations" Section
|
|---|
| Meeting Info.: | New Brunswick, NJ: January 11, 2013 |
|---|
| Source: | Proceedings of the Twenty-Second Annual Rutgers Turfgrass Symposium. 2013, p. 43. |
|---|
| Publishing Information: | New Brunswick, New Jersey: The Center for Turfgrass Science, Rutgers, The State University of New Jersey |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Brown ring patch; Genetic diversity; Microsatellites; Waitea circinata var. circinata
|
|---|
| Abstract/Contents: | "Waitea circinata var. circinata (henceforth, WCC) is an emerging pathogen of turfgrass in North America that causes brown ring patch. Here, we deployed seven highly polymorphic microsatellite markers for population genetic study of this pathogen. We analyzed the genetic diversity and structure of eastern and western US populations of WCC, as well as the association with host, colony growth rates, and sclerotium emergence. Genetic diversity and genotypic richness were higher in eastern than in western populations, but the two populations were not strongly differentiated from each other on average (FST = 0.014), indicating exchange across taxonomic boundaries. Interestingly, Bayesian clustering analysis revealed three cryptic populations within each of these geographic subdivisions. The majority of isolates from mixed stands of annual bluegrass and creeping bentgrass tended to cluster together, but the association was poorly supported by UPGMA clustering, suggesting that turfgrass cultivar may not be the organizing factor in that subdivision. Other phenotypes showed no obvious correspondence with the Bayesian clusters, but isolates that were in close proximity did tend to cluster together. Analysis of increasing population divergence with geographic distance (IBD) revealed a significant within population expansion (R2 > 0.1088, P < 0.05), which became more stochastic among populations (R2 = 0.0381, P = 0.062). The Bayesian clustering also supported differentiation of sclerotium emergence phenotype (QST > FST), suggesting that natural selection has caused evolutionary divergence of the sclerotium phenotype, in response to divergent environmental conditions. However, QST = 0.201 suggests that the two populations have not been isolated for a long period of time." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Njambere, E. N., F. P. Wong, and N. Zhang. 2013. Cryptic population genetic structure of Waitea circinata var. circinata infecting turfgrass. Proc. Rutgers Turfgrass Symp. p. 43. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=223848 |
| If there are problems with this record, send us feedback about record 223848. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://turf.rutgers.edu/research/abstracts/symposium2013.pdf#page=44
Last checked: 03/03/2017
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b3696858 |
| Find from within TIC:
Digitally in TIC by file name: rutsy2013 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
