EFS12- Book of abstracts - Contact

More documents

Recommendations

Info

SESSION 4: GENETICS OF HOSTS – PLANT RESISTANCE TO FUSARIUM, VARIETY DEVELOPMENT P86 - Selection of aggressive Fusarium isolates for breeding M. Ittu 1 , I. Ciocazanu 2 1 National Agricultural Research Development Institute (NARDI) Fundulea, 1 N. Titulescu street, 915200 Romania; 2 Pioneer Hi-Breed Seed Agro SRL, com. Ganeasa, sat Sindrilita DN 2, km 19,7, jud. Ilfov, 077010, Romania E-mail: ittum@ricic.ro Fusarium species from Gibberella fujikuroi complex (F.verticillioides, F.proliferatum and/or F. subglutinans) are important fungal pathogens that cause pink ear rot (PER), a disease of maize with devastating impact on yield losses and food safety. Use of reliable Fusarium isolates for assessment of host resistance and understanding of relation between phenotypic scoring and Fumonisin (FUM) accumulation are crucial for developing strategies to minimize the associated risks to disease. The objectives of this study were to evaluate: i) selection of aggressive isolates for large scale inoculums production in several Fusarium populations, sampled from South Romania and ii) relation between disease scores and FUM content under artificial field inoculation. New pathogenic isolates are obtained each two years, by specific procedures. Aggressiveness of the new isolates was evaluated under artificial inoculation in seedling stage, data being expressed as reduction of coleoptyle length in inoculated seedlings vs. noninoculated ones (as % of control). Isolates causing greatest reduction in coleoptiles growth were considered as most aggressive and were selected for large scale production of inoculum for breeding purposes. Multienvironment assessment of resistance under artificial field inoculations performed with highly aggressive F. verticillioides isolates, obtained in this way, revealed a very close negative correlation between pink ear rot rating (1=very sensitive, 9=very resistant) and FUM content (ppm) across years, according to correlation index that ranged from r=-0.729, N=61 (2008) to r=-0,815, N=15 (2010). Based on these findings it could be assumed that selection for reduced symptoms (pink ear rot score) should fairly allow identification of genotypes with reduced FUM content. Keywords: aggressiveness, Fumonisin (FUM), resistance, maize 179
SESSION 4: GENETICS OF HOSTS – PLANT RESISTANCE TO FUSARIUM, VARIETY DEVELOPMENT P87 - Developing test method to oats and barley for resistance to Fusarium langsethiae P. Parikka, M. Jalli MTT Agrifood Research Finland, Plant Production Research, FI-31600 Jokioinen, Finland E-mail: paivi.parikka@mtt.fi Importance of T-2/HT-2 toxins produced by F. langsethiae has increased recently in many countries, especially in Northern Europe and presence of toxins particularly in oats, raises questions of resistance in cultivars. Testing resistance in field conditions is difficult because of competing infections. F. langsethiae is the earliest Fusarium species infecting flowers and it has been detected in oats and barley at heading. Normally, Fusarium infections are dependent on humidity and infections in dry conditions are rare. F. langsethiae, however, can establish infections in field conditions without long-lasting high relative humidity. Development of greenhouse test to F. langsethiae was started at MTT Agrifood Research Finland in 2009 first on oats and later also some barley cultivars were included in the test calibration. Development and transmission of infection was studied by inoculating seedlings and developing plants at different growth stages: starting at young seedling stage and ending at panicle emergence and flowering. Inoculations with F. langsethiae spore suspension were made with a hand sprayer. Temperature and humidity were regulated according to plant development and inoculation periods. High humidity was maintained in greenhouse shortly before and after inoculation. Observations of infection were made one and two weeks after inoculation and of harvested grain by plating kernels on peptone-PCNB agar plates. F. langsethiae sprayed on young oat seedlings did not continue development further in plants and did not infect panicles. Inoculation at shoot development was also unable to proceed up to panicles, and when sprayed at flag leaf stage the fungus could only occasionally infect panicles. Successful infections were obtained when plants were inoculated at head/panicle emergence or one week after that. In oats, the later inoculations resulted in higher infections. Differences between cultivars could be obtained in observations both in oats and barley. Keywords: cultivars, resistance, infection 180
Page 1 and 2:
Bordeaux EFS12 12 th European Fusar
Page 4:
TABLE OF CONTENTS Welcome from the
Page 7:
4 SPONSORSHIP The 12 th European Fu
Page 11 and 12:
8 13:00 - 14:00 Lunch 14:00 - 15:00
Page 13 and 14:
10 Session 4: Genetics of Hosts - P
Page 15 and 16:
12 Thursday, May 16 th Session 6: F
Page 17 and 18:
Evidence for birth-and-death evolut
Page 19 and 20:
Future challenges of Fusarium and m
Page 21 and 22:
P35 - Screening deoxynivalenol in o
Page 23 and 24:
P76 - Fusarium verticillioides and
Page 25 and 26:
P113 - Agronomic practices and risk
Page 28:
ORAL PRESENTATIONS 25
Page 32 and 33:
KEYNOTE LECTURE SESSION 1: FUSARIUM
Page 34 and 35:
SESSION 1: FUSARIUM - GENETICS, GEN
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
KEYNOTE LECTURE SESSION 2: SECONDAR
Page 44 and 45:
SESSION 2: SECONDARY METABOLITES -
Page 46 and 47:
Page 48 and 49:
Page 50:
Page 53 and 54:
SESSION 3: PATHOGENESIS - EPIDEMIOL
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 64 and 65:
KEYNOTE LECTURE 1 SESSION 4: GENETI
Page 66 and 67:
SESSION 4: GENETICS OF HOSTS - PLAN
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
KEYNOTE LECTURE 2 SESSION 4: GENETI
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
KEYNOTE LECTURE SESSION 5: DISEASE
Page 80 and 81:
SESSION 5: DISEASE CONTROL AND FORE
Page 82 and 83:
Page 84 and 85:
Page 86:
Page 89 and 90:
SESSION 6: FUTURE CHALLENGE FOR EUR
Page 91 and 92:
Page 94:
POSTER PRESENTATIONS 91
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132: SESSION 2: SECONDARY METABOLITES -
Page 137 and 138: 134
Page 139 and 140: SESSION 3: PATHOGENESIS - EPIDEMIOL
Page 177 and 178: SESSION 4: GENETICS OF HOSTS - PLAN
Page 181: SESSION 4: GENETICS OF HOSTS - PLAN
Page 207 and 208: 204
Page 209 and 210: SESSION 5: DISEASE CONTROL AND FORE
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
de Hoog G. S., 89, 114, 236 de Kler
Page 243 and 244:
Ponts N., 33, 36, 82, 94, 104, 106,
Page 245 and 246:
242
Page 247 and 248:
BOKU-University of Natural Resource
Page 249 and 250:
touatisihem03@yahoo.fr He Xinyao In
Page 251 and 252:
steve.oliver@bioc.cam.ac. uk Ortega
Page 253 and 254:
Subramaniam Gopal Agriculture and A
show all

EFS12- Book of abstracts - Contact

Create successful ePaper yourself

Delete template?

Save as template?