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in Proceedings of the 27th National Summer Crops Workshop, held at Rampur, Chitawan, 18-20 April 2013, Vol. I / Giri, Y.P.
Title : Evaluation of rice genotypes against bacterial leaf blight and blast Material Type: printed text Authors: Purushottam Jha ; Surya Narayan Sah, Author ; Ram Baran Yadaw, Author ; Ram Baran Yadav, Author ; Anand Mandal, Author ; Dev Kumar Saphi, Author Pagination: 281-291 p. Languages : English (eng) Keywords: BLB Resistant Moderately resistant ; Susceptible and highly susceptible Abstract: A total of 354 rice lines in 2009 and 261 lines in 20 I 0 with a diverse genetic background were
evaluated for resistance to bacterial leaf blight over locations. Disease severity ranged from 0
to 9 in both the years. Bacterial leaf blight reactions in different genotypes were differed in
locations. During 2009, 263 genotypes were scored resistant (R) and 90 genotypes moderately
resistant (MR) and one susceptible at Parwanipur. Similarly, 244 genotypes were scored
resistant, 129 moderately resistant, one lines highly susceptible at Hardinath. Likewise, 193
genotypes scored resistant, Ill moderately resistant 39 were susceptible at Bhairahawa.
During 2010,107 genotypes scored resistant, 122 moderately resistant (MR), 33 lines
moderately susceptible (MS) and 2 lines susceptible at Hardinath. Similarly, in 20 I 0, 159
lines scored resistant, 50 moderately resistant (MR) and 23 moderately susceptible at
Parwanipur. 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. Similarly, A total of 242 rice lines in 2009 and 261 lines in
20 I 0 with a diverse genetic background were evaluated for resistance to blast disease over
locations. Disease severity ranged from 0 to 9 in both the years. Blast reactions in genotypes
were differed in all locations. During 2009, 242 genotypes were scored immune, 27 resistant
(R) and 28 genotypes moderately resistant (MR), at Parwanipur. Similarly, 2 genotypes were
scored as 2 immune, 217 resistant, 9 moderately resistant, 7 highly susceptible at Nawalpur.
Likewise, genotypes were found as 78 resistant, 97 moderately resistant, 36 susceptible at
Hardinath. During 20 I 0, genotypes were found as 33resistant, 151 moderately resistant, 56
lines moderately susceptible (MS) and 9 lines susceptible at Hardinath. Similarly in 20 I 0, 261
lines scored resistant, I moderately resistant and 2 highly susceptible at Parwanipur. 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.Link for e-copy: http://elibrary.narc.gov.np/?r=913 Evaluation of rice genotypes against bacterial leaf blight and blast [printed text] / Purushottam Jha ; Surya Narayan Sah, Author ; Ram Baran Yadaw, Author ; Ram Baran Yadav, Author ; Anand Mandal, Author ; Dev Kumar Saphi, Author . - [s.d.] . - 281-291 p.
in Proceedings of the 27th National Summer Crops Workshop, held at Rampur, Chitawan, 18-20 April 2013, Vol. I / Giri, Y.P.
Languages : English (eng)
Keywords: BLB Resistant Moderately resistant ; Susceptible and highly susceptible Abstract: A total of 354 rice lines in 2009 and 261 lines in 20 I 0 with a diverse genetic background were
evaluated for resistance to bacterial leaf blight over locations. Disease severity ranged from 0
to 9 in both the years. Bacterial leaf blight reactions in different genotypes were differed in
locations. During 2009, 263 genotypes were scored resistant (R) and 90 genotypes moderately
resistant (MR) and one susceptible at Parwanipur. Similarly, 244 genotypes were scored
resistant, 129 moderately resistant, one lines highly susceptible at Hardinath. Likewise, 193
genotypes scored resistant, Ill moderately resistant 39 were susceptible at Bhairahawa.
During 2010,107 genotypes scored resistant, 122 moderately resistant (MR), 33 lines
moderately susceptible (MS) and 2 lines susceptible at Hardinath. Similarly, in 20 I 0, 159
lines scored resistant, 50 moderately resistant (MR) and 23 moderately susceptible at
Parwanipur. 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. Similarly, A total of 242 rice lines in 2009 and 261 lines in
20 I 0 with a diverse genetic background were evaluated for resistance to blast disease over
locations. Disease severity ranged from 0 to 9 in both the years. Blast reactions in genotypes
were differed in all locations. During 2009, 242 genotypes were scored immune, 27 resistant
(R) and 28 genotypes moderately resistant (MR), at Parwanipur. Similarly, 2 genotypes were
scored as 2 immune, 217 resistant, 9 moderately resistant, 7 highly susceptible at Nawalpur.
Likewise, genotypes were found as 78 resistant, 97 moderately resistant, 36 susceptible at
Hardinath. During 20 I 0, genotypes were found as 33resistant, 151 moderately resistant, 56
lines moderately susceptible (MS) and 9 lines susceptible at Hardinath. Similarly in 20 I 0, 261
lines scored resistant, I moderately resistant and 2 highly susceptible at Parwanipur. 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.Link for e-copy: http://elibrary.narc.gov.np/?r=913 E-copies
http://nkcs.org.np/narc/dl/?r=913URL Evaluation of rice genotypes against bacterial leaf blight under field conditions / Bedanand Chaudhary
in Proceedings of the 27th National Summer Crops Workshop, held at Rampur, Chitawan, 18-20 April 2013, Vol. I / Giri, Y.P.
Title : Evaluation of rice genotypes against bacterial leaf blight under field conditions Material Type: printed text Authors: Bedanand Chaudhary ; Nabin Kumar Dangal, Author ; Parbati Joshi, Author ; Ang Tenjing Sherpa, Author Pagination: 313-318 p. Languages : English (eng) Keywords: Disease severity ; Xanthomonas oryzae pv. Genotype Resistant and Susceptible Abstract: Bacterial Leaf blight (BLB) of rice; caused by Xanthomonas oryzae pv. oryzae, is one of the
most important diseases of rice in the eastern terai ofNepal. A field screening experiment was
conducted to identify the resistance in rice to the disease during 2011 and 2012 wet season at
Regional Agricultural Research Station, Tarahara. A total of 134 (OBN-71 , RA VTRL-26,
RA VTN -21 , Quality-16) rice genotypes were evaluated for resistance in both the years. Each
entry was planted in 2 rows of 2m length. Susceptible variety of rice (purple) was planted at
an interval of every 10 entries. The pathogen was inoculated in all entries at 56 days after
transplanting using Kauffmans clipping method. The disease was scored at 21 days after
inoculation and continued for three scorings at 7 days interval using 0-9 scale. Severity of the
disease varied significantly among the tested rice genotypes in both years. Level of disease
severity was higher in most entries in 2012 than 2011 . Disease severity varied 11 to 100%.
None of the genotypes were free from the disease. Out of 134 genotypes, 34 genotypes were
moderately resistant to BLB disease during both the years which were IR09F 146, IR09F 166,
IR09Fl72, IR09F174, IR09Fl89, IR09Fll3, IR09Fl17, IR09Fl43, IR09Fl47, IR09Fl58,
IR09Fl77, IR09F229, CH-2, IR 80411-B-28-4, NR 1887-8-1-1-2, IR09Fl02, IR09F104,
IR09F187, IR09Fl95, IR09Fl03, IR09F105, IR09F106, IR09FIIO, IR09Fl23, IR09Fl78,
IR09F221 , IR09F226, IR09F283 , IR09F293, Sura vi, Sipi 5920-333 , Tarahara-1, Swarna and
Swam a sub-1. Altogether 96 genotypes were moderately resistant during 2011 which
decreased to 36 in 2012. Similarly, 16 genotypes were moderately susceptible during 2011
which increased to 55 in 2012. There were no highly susceptible genotypes during 2011 , but
32 genotypes became highly susceptible during 2012. Higher level of BLB disease was
observed in 2012 than 2011. IR 78937-B-B-B-B-1, IR 79913-B-176-B-4, IR 80973-B-186-
41-2, IR 70210-39-CPA7-1-1-4-2 were moderately resistant in 2011 but became highly
susceptible in 2012. BRRI Dhan-38, Mahima, IR70422-95-J-l , IR74052-95-3-3, Hardinath-2,
BASMATI 10 I were moderately susceptible during 2011 but became highly susceptible
during 2012. Similarly, IR 82635-B-B-47-2, Lalka basmati, IR 74371-54-1-1 , IR 86815-23-4-
1-2 and JH 15-1-1-1 were highly susceptible during 2012. Disease severity increased in
second and third scoring in all entries.Link for e-copy: http://elibrary.narc.gov.np/?r=917 Evaluation of rice genotypes against bacterial leaf blight under field conditions [printed text] / Bedanand Chaudhary ; Nabin Kumar Dangal, Author ; Parbati Joshi, Author ; Ang Tenjing Sherpa, Author . - [s.d.] . - 313-318 p.
in Proceedings of the 27th National Summer Crops Workshop, held at Rampur, Chitawan, 18-20 April 2013, Vol. I / Giri, Y.P.
Languages : English (eng)
Keywords: Disease severity ; Xanthomonas oryzae pv. Genotype Resistant and Susceptible Abstract: Bacterial Leaf blight (BLB) of rice; caused by Xanthomonas oryzae pv. oryzae, is one of the
most important diseases of rice in the eastern terai ofNepal. A field screening experiment was
conducted to identify the resistance in rice to the disease during 2011 and 2012 wet season at
Regional Agricultural Research Station, Tarahara. A total of 134 (OBN-71 , RA VTRL-26,
RA VTN -21 , Quality-16) rice genotypes were evaluated for resistance in both the years. Each
entry was planted in 2 rows of 2m length. Susceptible variety of rice (purple) was planted at
an interval of every 10 entries. The pathogen was inoculated in all entries at 56 days after
transplanting using Kauffmans clipping method. The disease was scored at 21 days after
inoculation and continued for three scorings at 7 days interval using 0-9 scale. Severity of the
disease varied significantly among the tested rice genotypes in both years. Level of disease
severity was higher in most entries in 2012 than 2011 . Disease severity varied 11 to 100%.
None of the genotypes were free from the disease. Out of 134 genotypes, 34 genotypes were
moderately resistant to BLB disease during both the years which were IR09F 146, IR09F 166,
IR09Fl72, IR09F174, IR09Fl89, IR09Fll3, IR09Fl17, IR09Fl43, IR09Fl47, IR09Fl58,
IR09Fl77, IR09F229, CH-2, IR 80411-B-28-4, NR 1887-8-1-1-2, IR09Fl02, IR09F104,
IR09F187, IR09Fl95, IR09Fl03, IR09F105, IR09F106, IR09FIIO, IR09Fl23, IR09Fl78,
IR09F221 , IR09F226, IR09F283 , IR09F293, Sura vi, Sipi 5920-333 , Tarahara-1, Swarna and
Swam a sub-1. Altogether 96 genotypes were moderately resistant during 2011 which
decreased to 36 in 2012. Similarly, 16 genotypes were moderately susceptible during 2011
which increased to 55 in 2012. There were no highly susceptible genotypes during 2011 , but
32 genotypes became highly susceptible during 2012. Higher level of BLB disease was
observed in 2012 than 2011. IR 78937-B-B-B-B-1, IR 79913-B-176-B-4, IR 80973-B-186-
41-2, IR 70210-39-CPA7-1-1-4-2 were moderately resistant in 2011 but became highly
susceptible in 2012. BRRI Dhan-38, Mahima, IR70422-95-J-l , IR74052-95-3-3, Hardinath-2,
BASMATI 10 I were moderately susceptible during 2011 but became highly susceptible
during 2012. Similarly, IR 82635-B-B-47-2, Lalka basmati, IR 74371-54-1-1 , IR 86815-23-4-
1-2 and JH 15-1-1-1 were highly susceptible during 2012. Disease severity increased in
second and third scoring in all entries.Link for e-copy: http://elibrary.narc.gov.np/?r=917 E-copies
http://nkcs.org.np/narc/dl/?r=917URL