U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Crop Production and Pest Control Research: West Lafayette, IN
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area West Lafayette, Indiana Crop Production and Pest Control Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications
- Small Grains Viral Disease Laboratory
- Corn and Sorghum Fungal Disease Laboratory
- Host Plant Resistance to Insects Laboratory
- Wheat/Hessian fly Interactions Laboratory
- Small Grains Fungal Disease Laboratory
- Soybean Quality Improvement Laboratory
- Uniform Soybean Tests, Northern Region

Title:   Author  item
                                            Goodwin, Stephen

                                                         - *Steve*item
                                            KEMA, GERT H.
  Submitted to: National American Phytopathology Meetings
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 5/1/2009
                                    Publication  Date: 8/1/2009
                                    Citation: Goodwin, S.B., Kema, G.J. 2009. Genome Plasticity in the Genus Mycosphaerella. Phytopathology 99:S166  Interpretive Summary:
                                Technical Abstract: Most members of the genus Mycosphaerella grow very slowly in culture and have long latent periods in planta.  Until recently, very little was known about their genetics or host-pathogen interactions.  Genomes of two species have been sequenced: the septoria tritici blotch pathogen of wheat, M. graminicola; and M. fijiensis, the black Sigatoka pathogen of banana.  The sequence of M. graminicola is complete; only one telomere and two internal gaps are missing.  Among the 21 chromosomes of the 39.7-Mb genome, eight were smaller, had higher repetitive DNA contents, lower percent G+C and fewer genes compared to the essential chromosomes.  These eight, representing 40% of the chromosomes and about 10% of the genome, could be missing in other isolates indicating an extraordinary degree of within-species genome plasticity.  In contrast, the genome of M. fijiensis was 74 Mb in size but had a similar gene content.  The increased size was due primarily to invasion of the genome by long-terminal repeat retrotransposons.  The mitochondrial genome of M. fijiensis also was about twice the size as that of M. graminicola.  Thus, extreme genome plasticity occurs both within and among species of the genus Mycosphaerella.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov