A total of 244 rice lines in 2002 with a diverse genetic background and 248 in 2003 were
tested for resistance to bacterial blight (BB) over locations. Disease severity ranged from 0
to 9 in both the years. Genotypes differed in disease reaction to BB over locations. During
2002, 4 genotypes scored resistant (R), 104 moderately resistant (MR), 101 moderately
susceptible (MS), 46 susceptible (S) and 19 highly susceptible (HS) to BB at Hardinath. At
Parwanipur, 201 genotypes rated immune. 36 R, 25 MR. and 10 MS to BB. At Bhairahawa, 3
genotypes showed R, 146 MR. 75 MS. 37 Sand 13 HS to BB. During 2003, 3 genotypes
registered R. 112 lv!R. 82 MS, 42 Sand 23 HS to BB at Hardinath while 16 entries did not
germinate. At Parwanipur, 85 enrries were immune, 109 R, 53 MR and 17 MS to BB while 13
entries failed to germinate. At Bhairahawa, 3 entries recorded R, 51 MR. 62 MS, 65 Sand 97
HS to disease. However, 58 and 22 genotypes were R to MR over locations during 2002 and
2003 tests, respective~v. This showed that there was prevalence of variable pathotypes over
locations and thus, genotypes need to be tested over locations to identify donor parents and
resistant genotypes for recommendation.
Out of 216 genotypes including standard and local r;hecks received from International Rice
Research Institute. 45 entries were R, 92 MR. 49 MS. 23 S and 4 HS to BB in 2003 test at
Hardinath, and the rest 3 entries did not germinate.

A total of 244 rice lines in 2002 with a diverse genetic background and 248 in 2003 were
tested for resistance to bacterial blight (BB) over locations. Disease severity ranged from 0
to 9 in both the years. Genotypes differed in disease reaction to BB over locations. During
2002, 4 genotypes scored resistant (R), 104 moderately resistant (MR), 101 moderately
susceptible (MS), 46 susceptible (S) and 19 highly susceptible (HS) to BB at Hardinath. At
Parwanipur, 201 genotypes rated immune. 36 R, 25 MR. and 10 MS to BB. At Bhairahawa, 3
genotypes showed R, 146 MR. 75 MS. 37 Sand 13 HS to BB. During 2003, 3 genotypes
registered R. 112 lv!R. 82 MS, 42 Sand 23 HS to BB at Hardinath while 16 entries did not
germinate. At Parwanipur, 85 enrries were immune, 109 R, 53 MR and 17 MS to BB while 13
entries failed to germinate. At Bhairahawa, 3 entries recorded R, 51 MR. 62 MS, 65 Sand 97
HS to disease. However, 58 and 22 genotypes were R to MR over locations during 2002 and
2003 tests, respective~v. This showed that there was prevalence of variable pathotypes over
locations and thus, genotypes need to be tested over locations to identify donor parents and
resistant genotypes for recommendation.
Out of 216 genotypes including standard and local r;hecks received from International Rice
Research Institute. 45 entries were R, 92 MR. 49 MS. 23 S and 4 HS to BB in 2003 test at
Hardinath, and the rest 3 entries did not germinate.