Submitted to: Arkansas Agricultural Experiment Station Research Series
Publication Type: Experiment Station
Publication Acceptance Date: 6/16/2008
Publication Date: 8/1/2008
Citation: Lee, F.N., Yan, W., Belmar, S.B. 2008. Rice blast evaluation of newly introduced germplasm. Arkansas Agricultural Experiment Station Research Series 560:65-79. Interpretive Summary:
Technical Abstract: Genetic resistance to the rice blast fungus, Magnaporthe oryzae (anamorph Pyricularia grisea oryzae) was identified in newly introduced rice germplasm through quarantine when tested in artificially inoculated greenhouse and field nursery tests during the 2007 growing season. Of 229 accessions, 31 were rated very resistant to rice panicle blast in field tests and to M. grisea races IB-1, IB-49, IC 17, IE-1, IE-1K, IG-1, and IH-1 in greenhouse tests. Of the 31 accessions, six also rated zero to race IB-33. In addition to these outstanding accessions, more than 40 additional accessions also scored as resistant in both tests. Several accessions were tentatively rated susceptible to a natural infection of Big Eye Leaf Spot caused by Drechslera gigantea. The disease data of the 229 accessions will be entered into the Germplasm Resources Information Network and be available along with other descriptors at www.ars-grin.gov .