| |
| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2007.pdf#page=42
Last checked: 11/28/2007
Requires: PDF Reader |
|---|
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Crouch, JoAnne;
Clarke, Bruce B.;
Hillman, Bradley I. |
|---|
| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University |
|---|
| Title: | Evolution of host specialization in Colletotrichum cereale associated with grasses from golf course greens, cereal crops and native praires |
|---|
| Section: | Poster presentations
Other records with the "Poster presentations" Section
|
|---|
| Meeting Info.: | Cook College, Rutgers, NJ: January 11-12, 2007 |
|---|
| Source: | Proceedings of the Sixteenth Annual Rutgers Turfgrass Symposium. Vol. 16, 2007, p. 41. |
|---|
| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Colletotrichum graminicola; Restriction fragment length polymorphism; Sexual reproduction
|
|---|
| Abstract/Contents: | "In populations of the turfgrass anthracnose fungus Colletotrichum cereale, the prevailing mode of reproduction is thought to occur clonally, as inferred primarily through the lack of a teleomorph. Coupled with the visual absence of a sexual state, previous reports of clonal genotypes from RAPD and isozyme analysis contribute to the notion that C. cereale has endured throughout history as an asexual organism. Because a pathogen's mode of reproduction strongly influences the course of its evolution and the alternative hypothesis has never been adequately tested, we are evaluating patterns of variation in this species. In the present study, we used an extensive nucleotide sequence dataset (4 genes, 3,400 nucleotides) to examine a large, worldwide sampling of pathogenic isolates of C. cereale from turfgrass and their counterparts isolated from cereal crops (wheat, oats, barley) and prairie grasses. This dataset illustrated that C. cereale is divided into several lineages, each composed of primarily (but not exclusively) either turfgrass or non-turfgrass derived isolates. Next, RFLP analysis of three transposon species provided evidence for recombination by C. cereale, even in relatively small populations. Furthermore, 21 of 35 unique transposon loci, when evaluated for dinucleotide compositional bias, displayed the signature pattern of repeat-induced point mutation (RIP), a genome defense mechanism that functions only during the meiosis. Taken together, our data rejects the presumption of clonality for C. cereale and, given the severe losses sustained in turfgrass systems due to this pathogen, strongly emphasizes the need for additional inquiry into the biology, mating and dispersal mechanisms of C. cereale." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Crouch, J., B. B. Clarke, and B. I. Hillman. 2007. Evolution of host specialization in Colletotrichum cereale associated with grasses from golf course greens, cereal crops and native praires. Proc. Annu. Rutgers Turfgrass Symp. 16:p. 41. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=123814 |
| If there are problems with this record, send us feedback about record 123814. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2007.pdf#page=42
Last checked: 11/28/2007
Requires: PDF Reader |
| 
MSU catalog number: SB 433 .R88 |
| Find from within TIC:
Digitally in TIC by file name: rutsy2007 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
