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5 result(s) search for keyword(s) 'Triticum'
Genetic Base of Wheat Cultivars Recommended in Nepal / Umesh R. Rosyara in Nepal Agriculture Research Journal, Vol. 6 (2005)
[article]
Title : Genetic Base of Wheat Cultivars Recommended in Nepal Material Type: printed text Authors: Umesh R. Rosyara, Author ; Joshi, Bal K., Author Publication Date: 2005 Article on page: 1-9 p. Languages : English (eng) Keywords: Coefficient of parentage, diversity, Triticum aestivum, wheat breeding Abstract: Plant breeding success is dependent, in part, upon the genetic diversity found within genetic
resources. The genetic base of wheat (Triticum aestivum L.) cultivars recommended in Nepal is not
well characterized. Therefore this study was carried out to quantify the genetic base of Nepalese
wheat cultivars by coefficient of parentage (COP). Analysis of pedigree information was based on
International Wheat Information System of the International Center for Maize and Wheat
Improvement (CIMMYT), which consists of WCOP for calculation of COP and WPDEND for
generating Mendelgram with contribution of ancestors to the cultivar if fully expanded. One
hundred eighteen ancestors from 23 countries were identified in the pedigree of 24 recommended
Nepalese cultivars. Of these, 32 ancestors contributed at least 1% each to the genetic base of
Nepalese cultivars, with a total contribution of 79%. Ancestors originating from USA contributed
19.8% of the genes, India 11.2%, Japan 9.5%, Argentina 7.5%, Kenya 7.5% Australia 6.2%, Brazil
5.6%, Canada 5.5%, Italy 4.1% and remaining from other countries. At 30% similarity, 18 clusters
were formed with largest cluster of five members. None of Nepalese landraces were traced in the
pedigree of these cultivars. Relatively large amount of diversity in Nepalese cultivars exits based on
their genetic background although small number of cultivars is recommended for cultivation.Link for e-copy: http://elibrary.narc.gov.np/?r=55
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 1-9 p.[article] Genetic Base of Wheat Cultivars Recommended in Nepal [printed text] / Umesh R. Rosyara, Author ; Joshi, Bal K., Author . - 2005 . - 1-9 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 1-9 p.
Keywords: Coefficient of parentage, diversity, Triticum aestivum, wheat breeding Abstract: Plant breeding success is dependent, in part, upon the genetic diversity found within genetic
resources. The genetic base of wheat (Triticum aestivum L.) cultivars recommended in Nepal is not
well characterized. Therefore this study was carried out to quantify the genetic base of Nepalese
wheat cultivars by coefficient of parentage (COP). Analysis of pedigree information was based on
International Wheat Information System of the International Center for Maize and Wheat
Improvement (CIMMYT), which consists of WCOP for calculation of COP and WPDEND for
generating Mendelgram with contribution of ancestors to the cultivar if fully expanded. One
hundred eighteen ancestors from 23 countries were identified in the pedigree of 24 recommended
Nepalese cultivars. Of these, 32 ancestors contributed at least 1% each to the genetic base of
Nepalese cultivars, with a total contribution of 79%. Ancestors originating from USA contributed
19.8% of the genes, India 11.2%, Japan 9.5%, Argentina 7.5%, Kenya 7.5% Australia 6.2%, Brazil
5.6%, Canada 5.5%, Italy 4.1% and remaining from other countries. At 30% similarity, 18 clusters
were formed with largest cluster of five members. None of Nepalese landraces were traced in the
pedigree of these cultivars. Relatively large amount of diversity in Nepalese cultivars exits based on
their genetic background although small number of cultivars is recommended for cultivation.Link for e-copy: http://elibrary.narc.gov.np/?r=55 Genetic Parameters of Common Wheat in Nepal / B.K Joshi in Journal of Nepal Agricultural Research Council, Vol.1 (August 2015)
[article]
Title : Genetic Parameters of Common Wheat in Nepal Material Type: printed text Authors: B.K Joshi, Author ; Thapa D.B, Author ; Bhatta, M.R., Author Publication Date: 2015 Article on page: 9-13p. Languages : English (eng) Keywords: Covariance components, genetic parameters, Triticum aestivum, variance components Abstract: Knowledge on variation within traits and their genetics are prerequisites in crop improvement program. Thus, in present paper we aimed to estimate genetic and environmental indices of common wheat genotypes. For the purpose, eight quantitative traits were measured from 30 wheat genotypes, which were in randomized complete block design with 3 replicates. Components of variance and covariance were estimated along with heritability, genetic gain, realized heritability, coheritability and correlated response. Differences between phenotypic and genotypic variances in heading days, maturity days and plant height were not large. Grain yield and plant height showed the highest phenotypic (18.189%) and genotypic (12.06%) coefficient of variances, respectively. Phenotypic covariance was higher than genotypic and environmental covariance in most of the traits. The highest heritability and realized heritability were of heading days followed by maturity days. Genetic gain for plant height was the highest. Co-heritability of 1000-grain weight with tillers number was the highest. The highest correlated response was expressed by grain yield with tillers number. This study indicates the possibility of improving wheat genotypes through selection utilizing existing variation in these traits.
Link for e-copy: http://elibrary.narc.gov.np/?r=1313
in Journal of Nepal Agricultural Research Council > Vol.1 (August 2015) . - 9-13p.[article] Genetic Parameters of Common Wheat in Nepal [printed text] / B.K Joshi, Author ; Thapa D.B, Author ; Bhatta, M.R., Author . - 2015 . - 9-13p.
Languages : English (eng)
in Journal of Nepal Agricultural Research Council > Vol.1 (August 2015) . - 9-13p.
Keywords: Covariance components, genetic parameters, Triticum aestivum, variance components Abstract: Knowledge on variation within traits and their genetics are prerequisites in crop improvement program. Thus, in present paper we aimed to estimate genetic and environmental indices of common wheat genotypes. For the purpose, eight quantitative traits were measured from 30 wheat genotypes, which were in randomized complete block design with 3 replicates. Components of variance and covariance were estimated along with heritability, genetic gain, realized heritability, coheritability and correlated response. Differences between phenotypic and genotypic variances in heading days, maturity days and plant height were not large. Grain yield and plant height showed the highest phenotypic (18.189%) and genotypic (12.06%) coefficient of variances, respectively. Phenotypic covariance was higher than genotypic and environmental covariance in most of the traits. The highest heritability and realized heritability were of heading days followed by maturity days. Genetic gain for plant height was the highest. Co-heritability of 1000-grain weight with tillers number was the highest. The highest correlated response was expressed by grain yield with tillers number. This study indicates the possibility of improving wheat genotypes through selection utilizing existing variation in these traits.
Link for e-copy: http://elibrary.narc.gov.np/?r=1313 Study on morphological characteristics of wheat and barley varieties, 1993/94 / Panthee, D.R.
Title : Study on morphological characteristics of wheat and barley varieties, 1993/94 Material Type: printed text Authors: Panthee, D.R. ; , Publisher: Pokhara : LARC Publication Date: 1994 Pagination: 13 Keywords: Wheats; Plant anatomy; Barley; Varieties; Triticum aestivum; Cereals Study on morphological characteristics of wheat and barley varieties, 1993/94 [printed text] / Panthee, D.R. ; , . - Pokhara : LARC, 1994 . - 13.
Keywords: Wheats; Plant anatomy; Barley; Varieties; Triticum aestivum; Cereals Copies (1)
Barcode Call number Media type Location Section Status NR-2880 NR-2880, Document NARC Library Documents Available
Title : Wheat Research Program(1982-83) Material Type: printed text Publisher: Siddhartha Nagar : NWDP Publication Date: 1983 Pagination: 117 p. Languages : English (eng) Keywords: breeding;crossing program in triticum aestivum;off season nursery;varietal maintenance;minikit Link for e-copy: http://elibrary.narc.gov.np/?r=3772 Wheat Research Program(1982-83) [printed text] . - Siddhartha Nagar : NWDP, 1983 . - 117 p.
Languages : English (eng)
Keywords: breeding;crossing program in triticum aestivum;off season nursery;varietal maintenance;minikit Link for e-copy: http://elibrary.narc.gov.np/?r=3772 Wheat variety improvement research report 1994/95 / Joshi, K.D.
Title : Wheat variety improvement research report 1994/95 Material Type: printed text Authors: Joshi, K.D. ; , Publisher: Pokhara : LARC Publication Date: 1995 Pagination: 29 Keywords: Wheats; Yield components; Triticum aestivum; Variety trials; Field experimentation; Phenology; Cereals Wheat variety improvement research report 1994/95 [printed text] / Joshi, K.D. ; , . - Pokhara : LARC, 1995 . - 29.
Keywords: Wheats; Yield components; Triticum aestivum; Variety trials; Field experimentation; Phenology; Cereals Copies (1)
Barcode Call number Media type Location Section Status NR-2789 NR-2789, Document NARC Library Documents Available