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Refine your searchEvaluation of Tomato Inbred Lines for the Production of Fl Hybrids / Regmi, H.N. ; Budathoki, K ; N G Pradhan
Title : Evaluation of Tomato Inbred Lines for the Production of Fl Hybrids Material Type: printed text Authors: Regmi, H.N., Author ; Budathoki, K, Author ; N G Pradhan, Author Pagination: 401-404 p. Languages : English (eng) Keywords: hybrid, tomato, inbred lines Abstract: It has been estimated that hybrid seed of vegetable crops worth of million of Rupees is
imported every year to Nepal from various countries. These imported hybrid seeds are too
expensive and are affordable only to few resource rich famzers. Additionally the supply of
these hybrids seeds is irregular and quality is questionable which have affected productivity,
production, quality and income of farmers. In view of these problems hybrid seed production
of tomato was initiated at Horticulture Research Division Klwmaltar, during 2001, 2002 and
2003. A total of 18 inbred lines were characterized and evaluated. Variation infntit size (20
gm to 100 gm), fntit shape (round to oblong), growth habit (determinate and indeterminate),
yield potelltial of these inbreeds are recorded. Also different crosses were made from these
inbred lines. A total of 35 combinations were made during last three years. These F1 hybrid.
lines had fruit size ranged from 30 gm to BO·gm. Tomato growers from Kathmandu, i.Alitpur,
Bhaktapurand Kavre Districts evaluated these FJ hybrid lines at HRD, Khumal and selected
some of F1 lines on the basis offntit size, wilt tolerance andfntit shape.Link for e-copy: http://elibrary.narc.gov.np/?r=677 Evaluation of Tomato Inbred Lines for the Production of Fl Hybrids [printed text] / Regmi, H.N., Author ; Budathoki, K, Author ; N G Pradhan, Author . - [s.d.] . - 401-404 p.
Languages : English (eng)
Keywords: hybrid, tomato, inbred lines Abstract: It has been estimated that hybrid seed of vegetable crops worth of million of Rupees is
imported every year to Nepal from various countries. These imported hybrid seeds are too
expensive and are affordable only to few resource rich famzers. Additionally the supply of
these hybrids seeds is irregular and quality is questionable which have affected productivity,
production, quality and income of farmers. In view of these problems hybrid seed production
of tomato was initiated at Horticulture Research Division Klwmaltar, during 2001, 2002 and
2003. A total of 18 inbred lines were characterized and evaluated. Variation infntit size (20
gm to 100 gm), fntit shape (round to oblong), growth habit (determinate and indeterminate),
yield potelltial of these inbreeds are recorded. Also different crosses were made from these
inbred lines. A total of 35 combinations were made during last three years. These F1 hybrid.
lines had fruit size ranged from 30 gm to BO·gm. Tomato growers from Kathmandu, i.Alitpur,
Bhaktapurand Kavre Districts evaluated these FJ hybrid lines at HRD, Khumal and selected
some of F1 lines on the basis offntit size, wilt tolerance andfntit shape.Link for e-copy: http://elibrary.narc.gov.np/?r=677 E-copies
http://nkcs.org.np/narc/dl/?r=677URLResistance in Rice Breeding Lines to the Blast Fungus in Nepal / Bedananda Chaudhary in Nepal Agriculture Research Journal, Vol. 6 (2005)
Title : Resistance in Rice Breeding Lines to the Blast Fungus in Nepal Material Type: printed text Authors: Bedananda Chaudhary, Author ; Sundar M. Shrestha, Author ; Sharma, R.C., Author Publication Date: 2005 Article on page: 49-56 p Languages : English (eng) Keywords: Blast resistance, field condition, greenhouse assay, Pyricularia grisea, rice lines Abstract: A total of 36 rice breeding lines including checks were evaluated for resistance to blast at
Rampur during 2000-2001. The experiments were conducted under both field condition and
greenhouse inoculated condition. Qualitative resistance in rice to blast was assessed based on
lesion type, whereas quantitative resistance was assessed based on area under disease progress
curve (AUDPC) in the upland field condition. The number of sporulating lesions and the number
of leaves with at least one sporulating lesion per plant were considered as measures for
evaluation of quantitative resistance in the greenhouse assay. The lesion type, neck blast
percentage and AUDPC data suggest that most of the rice lines possess higher level of resistance
to leaf and neck blast. The rice lines varied for the number of sporulating lesions and the number
of leaves with sporulating lesion per plant. Some lines were incompatible to virulent blast
isolates, showing major resistance genes. NR 1558, NR 601-1-1-9, BW306-2 and CN 836-3-10
were promising lines for quantitative resistance to both leaf and neck blast. Radha 12, Sabitri,
Janaki possess higher level of quantitative resistance to blast, hence these could be promoted for
cultivation in blast-prone environments. These genotypes could also be utilized as donor parents
for breeding durable blast resistant varieties. The most virulent blast isolate could be used for
evaluation of both qualitative and quantitative resistance to blast in early generation in the
greenhouse so that workload could be cut down in future works.Link for e-copy: http://elibrary.narc.gov.np/?r=61
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 49-56 p[article] Resistance in Rice Breeding Lines to the Blast Fungus in Nepal [printed text] / Bedananda Chaudhary, Author ; Sundar M. Shrestha, Author ; Sharma, R.C., Author . - 2005 . - 49-56 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 49-56 p
Keywords: Blast resistance, field condition, greenhouse assay, Pyricularia grisea, rice lines Abstract: A total of 36 rice breeding lines including checks were evaluated for resistance to blast at
Rampur during 2000-2001. The experiments were conducted under both field condition and
greenhouse inoculated condition. Qualitative resistance in rice to blast was assessed based on
lesion type, whereas quantitative resistance was assessed based on area under disease progress
curve (AUDPC) in the upland field condition. The number of sporulating lesions and the number
of leaves with at least one sporulating lesion per plant were considered as measures for
evaluation of quantitative resistance in the greenhouse assay. The lesion type, neck blast
percentage and AUDPC data suggest that most of the rice lines possess higher level of resistance
to leaf and neck blast. The rice lines varied for the number of sporulating lesions and the number
of leaves with sporulating lesion per plant. Some lines were incompatible to virulent blast
isolates, showing major resistance genes. NR 1558, NR 601-1-1-9, BW306-2 and CN 836-3-10
were promising lines for quantitative resistance to both leaf and neck blast. Radha 12, Sabitri,
Janaki possess higher level of quantitative resistance to blast, hence these could be promoted for
cultivation in blast-prone environments. These genotypes could also be utilized as donor parents
for breeding durable blast resistant varieties. The most virulent blast isolate could be used for
evaluation of both qualitative and quantitative resistance to blast in early generation in the
greenhouse so that workload could be cut down in future works.Link for e-copy: http://elibrary.narc.gov.np/?r=61
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Title : Evaluation of rice genotypes for resistance to bacterial blight Material Type: printed text Authors: B. Chaudhary ; M Yadav, Author ; Yadaw, R.B., Author ; DB Gharti, Author ; Akhtar, T., Author ; Bhandari, D., Author Pagination: 344-348 p. Languages : English (eng) Keywords: Bacterial blight ; rice lines resistance locations pathotypes Abstract: 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.Link for e-copy: http://elibrary.narc.gov.np/?r=1121 Evaluation of rice genotypes for resistance to bacterial blight [printed text] / B. Chaudhary ; M Yadav, Author ; Yadaw, R.B., Author ; DB Gharti, Author ; Akhtar, T., Author ; Bhandari, D., Author . - [s.d.] . - 344-348 p.
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Languages : English (eng)
Keywords: Bacterial blight ; rice lines resistance locations pathotypes Abstract: 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.Link for e-copy: http://elibrary.narc.gov.np/?r=1121 E-copies
http://nkcs.org.np/narc/dl/?r=1121URL
in Proceedings of the 27th National Summer Crops Workshop, held at Rampur, Chitawan, 18-20 April 2013, Vol. I / Giri, Y.P.
Title : Performance of IRRI bred rice hybrids and future strategy for development of hybrid rice in Nepal Material Type: printed text Authors: Shambhu Prasad Khatiwada ; Surya Narayan Sah ; Ram Baran Yadaw ; Umesh Sah ; Joshi, Bal K. Pagination: 1-8 p. Languages : English (eng) Keywords: Hybrid rice ; CMS lines strategies; grain yield Abstract: Cultivation of inbred rice varieties is not sufficient to meet the food demand of ever
increasing population of the country. National Rice Research Program, Hardinath evaluated
IRRJ bred rice hybrids through INGER networks in 2004, 2005 and 2012 for identifying high
yielding suitable rice hybrids in the country. The field experiments were conducted in
augmented design, consisting of 31 hybrids and eight checks, replicated five times in 2004,
and 63 hybrids and eight checks, replicated thrice in 2005. In 2012, it was conducted in RCB
design with three replications having 25 hybrids and three check varieties. Grain yield
difference was statistically significant among the hybrids in 2004 but it was not significant in
2005 and 2012. However, remarkable high yielding hybrids were identified each year
compared to checks. In 2004, I I genotypes produced higher yield than Sabitri (4.4 tfha) on
the basis of yield of Sabitri plus standard error of the mean (>4.4 t+0.88) but six hybrids
showed >30 % higher yield than Sabitri i.e. IR80786H and IR79140H by 34%, IR79168H,
IR80633H and TR8078 I H by 36.4% and TR80634H by 50% . Based on the yield plus the
standard error of the mean (5 .2 t+0.88) only IR80634H produced the higher grain yield than
international check IR75207H (5 .2tfha). ln 2005, highest yielding genotypes were IR80635H,
IR81962H, TR80627H and IR81247H that produced the grain yield of 5.7 t/ha, 5.7 tfha, 5.4
tfha and 5.1 tfha, respectively and these three superior yields were in order of 42.5%, 35% and
27.5% higher to the yield of Sabitri. Similarly, in 2012 four hybrids that produced the grain
yield >5.0 tfha were IR90872H (5 .6tfha), IR82391 H (5 .3 tfha), IR82366H (5.1 tfha) and
IRRII67 (5.1 tfha) which were 43 .6%, 35.9% and 30.1% higher to Sabitri (3.9 tfha). These
high yielding hybrids had other desirable agronomic traits to fit in prevailing rice cropping
system. Nepal has recently received the membership to international hybrid rice consortium to
strengthen hybrid rice research in the cotmtry and NARC is eligible to get support for
advancing hybrid rice research from IRRI. NRRP-NARC has formulated the short and long
term strategies for hybrid rice research and development. The short term strategy includes the
identification of introduced hybrids and introduction of their A, B and R lines, while the long
term strategy considers the development of A, B and R lines from own germplasm. In
addition to IRRI, NARC is also looking forward for collaboration with Chinese Government
for hybrid rice development in the country.Link for e-copy: http://elibrary.narc.gov.np/?r=852 Performance of IRRI bred rice hybrids and future strategy for development of hybrid rice in Nepal [printed text] / Shambhu Prasad Khatiwada ; Surya Narayan Sah ; Ram Baran Yadaw ; Umesh Sah ; Joshi, Bal K. . - [s.d.] . - 1-8 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: Hybrid rice ; CMS lines strategies; grain yield Abstract: Cultivation of inbred rice varieties is not sufficient to meet the food demand of ever
increasing population of the country. National Rice Research Program, Hardinath evaluated
IRRJ bred rice hybrids through INGER networks in 2004, 2005 and 2012 for identifying high
yielding suitable rice hybrids in the country. The field experiments were conducted in
augmented design, consisting of 31 hybrids and eight checks, replicated five times in 2004,
and 63 hybrids and eight checks, replicated thrice in 2005. In 2012, it was conducted in RCB
design with three replications having 25 hybrids and three check varieties. Grain yield
difference was statistically significant among the hybrids in 2004 but it was not significant in
2005 and 2012. However, remarkable high yielding hybrids were identified each year
compared to checks. In 2004, I I genotypes produced higher yield than Sabitri (4.4 tfha) on
the basis of yield of Sabitri plus standard error of the mean (>4.4 t+0.88) but six hybrids
showed >30 % higher yield than Sabitri i.e. IR80786H and IR79140H by 34%, IR79168H,
IR80633H and TR8078 I H by 36.4% and TR80634H by 50% . Based on the yield plus the
standard error of the mean (5 .2 t+0.88) only IR80634H produced the higher grain yield than
international check IR75207H (5 .2tfha). ln 2005, highest yielding genotypes were IR80635H,
IR81962H, TR80627H and IR81247H that produced the grain yield of 5.7 t/ha, 5.7 tfha, 5.4
tfha and 5.1 tfha, respectively and these three superior yields were in order of 42.5%, 35% and
27.5% higher to the yield of Sabitri. Similarly, in 2012 four hybrids that produced the grain
yield >5.0 tfha were IR90872H (5 .6tfha), IR82391 H (5 .3 tfha), IR82366H (5.1 tfha) and
IRRII67 (5.1 tfha) which were 43 .6%, 35.9% and 30.1% higher to Sabitri (3.9 tfha). These
high yielding hybrids had other desirable agronomic traits to fit in prevailing rice cropping
system. Nepal has recently received the membership to international hybrid rice consortium to
strengthen hybrid rice research in the cotmtry and NARC is eligible to get support for
advancing hybrid rice research from IRRI. NRRP-NARC has formulated the short and long
term strategies for hybrid rice research and development. The short term strategy includes the
identification of introduced hybrids and introduction of their A, B and R lines, while the long
term strategy considers the development of A, B and R lines from own germplasm. In
addition to IRRI, NARC is also looking forward for collaboration with Chinese Government
for hybrid rice development in the country.Link for e-copy: http://elibrary.narc.gov.np/?r=852 E-copies
http://nkcs.org.np/narc/dl/?r=852URL
