POSTERS: Genetics of resistance
Pathogenicity diversity of korean race K3a of Xanthomonas oryzae pv. oryzae
Shinhwa Kim - Rural Development Administration. Bong Choon Lee- Rural Development Administration, Hyun Ju Kim- Rural Development Administration, Sang-Min Kim- Rural Development Administration, Nak Jung Choi- Rural Development Administration
Isolates collected from 2001 to 2018 are divided using differential varieties. also, pathogenicity precisely checked up using the IRBB series (IR24, IRBB1, IRBB2, IRBB3, IRBB4, IRBB5, IRBB7, IRBB8, IRBB10, IRBB11, IRBB13, IRBB14, IRBB21), which is a Near-isogenic lines. As a result of comparing the pathogenicity with the classified race, it was confirmed that some of the pathogens classified as K3a race were different pathogenicity from the previously reported pathogenicity of K3a race. In other words, although K3a has been reported to show a resistance response to Xa21, a group of K3a race showing certain susceptibility to Xa21 has been identified.
In this way, although the classification system can be classified into the same race, it can be divided into different groups by confirming the pathogenicity by monogenic near-isogenic lines. Based on this, it is necessary to establish a detailed and efficient classification system of korean race classification.