Annual Meeting Program Book - American Phytopathological Society

2009 aPs PosTers
(1), H. C. Gutting (1), L. A. Henderson (1), M.
Hausbeck (1). (1) Michigan State University, East
Lansing, MI, U.S.A.
P-579 Genetic structure of Phytophthora infestans
populations in China indicates multiple migration
events. L. Guo (1), X. Zhu (1), C. Hu (2), J. B.
RISTAINO (2). (1) Department of Plant Pathology,
China Agricultural University, Beijing, China; (2)
North Carolina State University, Raleigh, NC,
U.S.A.
P-580 Occurrence of Phytophthora rubi and Pratylenchus
penetrans in northwestern Washington red raspberry
fields. J. GIGOT (1), I. Zasada (2), T. Forge (3),
T. Walters (1). (1) Washington State University-
NWREC, Mount Vernon, WA, U.S.A.; (2)
USDA-ARS Horticultural Crops Unit, Corvallis,
OR, U.S.A.; (3) Agri-Food Canada, Aggassiz, BC,
P-581
80
Canada
flash
&
dash Phytophthora ramorum - pathogenic fitness
of the three clonal lineages. C. R. ELLIOTT (1), V.
McDonald (1), N. J. Grunwald (2). (1) Department
of Botany and Plant Pathology, Oregon State
University, Corvallis, OR, U.S.A.; (2) Horticultural
Crops Research Laboratory, USDA ARS, Corvallis,
OR, U.S.A.
Population Genetics
P-582 Biological diversity, pathogenicity and population
structure of Rhizoctonia spp. associated with rice
sheath blight in Arkansas. V. L. CASTROAGUDIN
(1), R. D. Cartwright (1), J. C. Correll (1). (1)
University of Arkansas, Fayetteville, AR, U.S.A.
P-583
flash
&
dash Diversity of Fusarium oxysporum isolates
P-584
infecting cortical tissues of chickpea roots. J.
DEMERS (1), D. Jimenez-Fernandez (2), S.
Velarde-Felix (3), B. B. Landa (4), R. M. Jimenez-
Diaz (5), M. Jimenez-Gasco (1). (1) Pennsylvania
State University, University Park, PA, U.S.A.;
(2) University of Cordoba, Cordoba, Spain; (3)
INIFAP, Culiacan, Sinaloa, Mexico; (4) Instituto de
Agricultura Sostenible, CSIC, Cordoba, Spain; (5)
University of Cordoba and Instituto de Agricultura
Sostenible, CSIC, Cordoba, Spain
Parasexual recombination and migration maintain
genotypic diversity in the aflatoxin-producing fungal
plant pathogen Aspergillus flavus. L. C. Grubisha
(1), P. J. COTTY (1). (1) USDA-ARS/University of
Arizona, Tucson, AZ, U.S.A.
P-585 Genotype shift in a Venturia inaequalis population
during an apple scab epidemic in Pennsylvania.
L. ZHANG (1), M. Jimenez-Gasco (1). (1)
Department of Plant Pathology, The Pennsylvania
State University, University Park, PA, U.S.A.
P-586 Genetic population structure of Cochliobolus
miyabeanus on cultivated wild rice (Zizania palustris
L.) in Minnesota. C. V. CASTELL-MILLER (1), D.
A. Samac (1). (1) USDA ARS, St. Paul, MN, U.S.A.
P-587 Pathogenic and genotypic variation of Iranian
isolates of Fusarium oxysporum f. sp. betae. S.
BELADI BEHBEHANI (1), S. Rezaee (1), B.
Mahmoudi (2). (1) Science and Research Branch,
Islamic Azad University, Tehran, Iran; (2) Sugar Beet
Seed Institute, Karaj, Tehran, Iran
P-588 Population structure of Fusarium oxysporum f. sp.
radicis-lycopersici in Florida inferred from vegetative
compatibility groups and microsatellites. C.
HUANG (1), P. D. Roberts (2), L. R. Gale (3),
W. H. Elmer (4), L. E. Datnoff (5). (1) University
of Florida, Gainesville, FL, U.S.A.; (2) University
of Florida, SWFREC, Immokalee, FL, U.S.A.; (3)
University of Minnesota, St. Paul, MN, U.S.A.; (4)
Conn. Agric. Exp. Station, New Haven, CT, U.S.A.;
(5) Louisiana State University, Baton Rouge, LA,
U.S.A.
P-589 Population of bean pod mottle virus in Mississippi.
R. C. STEPHENSON (1), S. Sabanadzovic (1). (1)
Department of Entomology and Plant Pathology,
Mississippi State University, Mississippi State, MS,
U.S.A.
P-590 Russian isolates of potato spindle tuber viroid
exhibit low sequence diversity. R. OWENS (1),
N. Girsova (2), K. Kromina (2), I. Lee (1), K.
Mozhaeva (2), T. Kastalyeva (2). (1) USDA/
ARS, Beltsville, MD, U.S.A.; (2) VNIIF Bolshie
Vyaziomy Moscow Region 143050, Russia
P-591 Exploring bacterial diversity in irrigation runoff
water containment basins. Z. XU (1), P. A.
Richardson (1), P. Kong (1), W. Hao (1), G. W.
Moorman (2), J. D. Lea-Cox (3), D. S. Ross (3),
C. Hong (1). (1) Virginia Polytechnic Institute and
State University, Virginia Beach, VA, U.S.A.; (2)
The Pennsylvania State University, University Park,
PA, U.S.A.; (3) University of Maryland, College
Park, MD, U.S.A.
■ MoleCular/Cellular/PlanT-MICrobe
InTeraCTIons
Bacteria – Genetics/Molecular Biology/Cell Biology
P-592 The alternate major effector AvrXa7 in bacterial
blight of rice evades host resistance by targeting an
alternate major host susceptibility gene. G. ANT-
ONY (1), B. Yang (2), F. F. White (1). (1) Kansas
State University, U.SA.; (2) Iowa State University,
U.S.A.
P-593 Seed transmission of Candidatus Liberibacter
asiaticus in citrus without typical huanglongbing.
L. BENYON (1), L. Zhou (2), Y. Duan (3), G. Mc-
Collum (4), C. Powell (2), D. Hall (4), M. Irey (5),
T. Gottwald (4). (1) USDA ARS, Fort Pierce, FL,
U.S.A.; (2) University of Florida, IFAS-IRREC, Fort
Pierce, FL, U.S.A.; (3) USDA ARS, U.S. Horticultural
Research Lab, Fort Pierce, FL, U.S.A.; (4)
USDA –ARS –USHRL, Fort Pierce, FL, U.S.A.; (5)
United States Sugar Corp., Clewiston, FL, U.S.A.