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in Agricultural research for enhancing livelihood of Nepalese people: Proceedings of 2nd SAS-N Convention, 30 July-1 Aug 2003, Kathmandu / Joshi, Bal K.
Title : Rice gene pool for mid and high hills and its conservation in Nepal Material Type: printed text Authors: B.K. Joshi, Author Pagination: 252-264 p. Languages : English (eng) Keywords: Ancestor, conservation, landrace, Nepalese rice cultivar, gene pool Abstract: Study on crop gene pool helps to develop varieties, to know the potential sources for breeding materials, to develop strategy for sustainable use and conservation and to know the richness in crop genetic resources of particular country. Individual farmers value diversity within and between their crops because of heterogeneous soils and production conditions, risk factors, market demand, consumption and uses of different products from an individual crop species. Both the potential for long term genetic gain and the reduction of genetic vulnerability may depend on the genetic diversity present in the genetic base…….
Link for e-copy: http://elibrary.narc.gov.np/?r=1154 Rice gene pool for mid and high hills and its conservation in Nepal [printed text] / B.K. Joshi, Author . - [s.d.] . - 252-264 p.
in Agricultural research for enhancing livelihood of Nepalese people: Proceedings of 2nd SAS-N Convention, 30 July-1 Aug 2003, Kathmandu / Joshi, Bal K.
Languages : English (eng)
Keywords: Ancestor, conservation, landrace, Nepalese rice cultivar, gene pool Abstract: Study on crop gene pool helps to develop varieties, to know the potential sources for breeding materials, to develop strategy for sustainable use and conservation and to know the richness in crop genetic resources of particular country. Individual farmers value diversity within and between their crops because of heterogeneous soils and production conditions, risk factors, market demand, consumption and uses of different products from an individual crop species. Both the potential for long term genetic gain and the reduction of genetic vulnerability may depend on the genetic diversity present in the genetic base…….
Link for e-copy: http://elibrary.narc.gov.np/?r=1154 E-copies
http://nkcs.org.np/narc/dl/?r=1154URLRice Gene Pool for Tarai and Inner Tarai Areas of Nepal / Joshi, Bal K. in Nepal Agriculture Research Journal, Vol. 6 (2005)
Title : Rice Gene Pool for Tarai and Inner Tarai Areas of Nepal Material Type: printed text Authors: Joshi, Bal K., Author Publication Date: 2005 Article on page: 10-22 p Languages : English (eng) Keywords: Ancestor, Landrace, Nepalese rice cultivar, Rice gene pool, Tarai and Inner Abstract: Knowledge on crop gene pool helps to develop varieties, to know the potential sources for
breeding materials and to develop strategy for sustainable use and conservation. The amount of
genetic diversity presents depends on the number and diversity of the original ancestors
involved in the creation of a germplasm pool, existing landraces and wild species. The objective
of this research was to study the diversity of rice gene pool present in the Nepalese improved
rice cultivars and landraces adapted to Tarai and Inner Tarai ( Nepalese rice cultivars were examined and surveyed the literature for distribution of landraces
and wild relatives of rice. Crosses among indica rice gene pool are more common and use of
japonica and nivara species were less common. There are 28 improved rice cultivars, >500
landraces, and 6 wild species and relatives of rice adapted to Tarai and Inner Tarai. Eight
countries are the origins for 28 cultivars. In Nepal 4 cultivars were bred and developed using a
local landrace and exotic genotypes. A total of 35 ancestors originated in 11 different countries
were used to develop these 28 cultivars. Highest number of ancestors was from India. Use of
ancestors of both sativa and nivara species having indica and japonica types indicated the
collection of wide gene pool. Most of the ancestors were sativa (60.00%) and indica (65.71%).
Genetic erosion is observed in rice diversity therefore, in situ, on farm and ex situ conservations
are necessary for maintaining the genetic variation. Utilization of local landraces in breeding
program may be the good way of genetic resources conservation. Gene pool from these
landraces along with international gene pool could make towards success in developing high
yielding cultivars with wide adaptability and/or site specific. In this study, cultivars and
landraces surveyed represent a wide range of variation for different areas of origin and
adaptation. This genetic diversity is very useful for further rice improvement and should be
conserved both ex situ and in situ.Link for e-copy: http://elibrary.narc.gov.np/?r=56
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 10-22 p[article] Rice Gene Pool for Tarai and Inner Tarai Areas of Nepal [printed text] / Joshi, Bal K., Author . - 2005 . - 10-22 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 6 (2005) . - 10-22 p
Keywords: Ancestor, Landrace, Nepalese rice cultivar, Rice gene pool, Tarai and Inner Abstract: Knowledge on crop gene pool helps to develop varieties, to know the potential sources for
breeding materials and to develop strategy for sustainable use and conservation. The amount of
genetic diversity presents depends on the number and diversity of the original ancestors
involved in the creation of a germplasm pool, existing landraces and wild species. The objective
of this research was to study the diversity of rice gene pool present in the Nepalese improved
rice cultivars and landraces adapted to Tarai and Inner Tarai ( Nepalese rice cultivars were examined and surveyed the literature for distribution of landraces
and wild relatives of rice. Crosses among indica rice gene pool are more common and use of
japonica and nivara species were less common. There are 28 improved rice cultivars, >500
landraces, and 6 wild species and relatives of rice adapted to Tarai and Inner Tarai. Eight
countries are the origins for 28 cultivars. In Nepal 4 cultivars were bred and developed using a
local landrace and exotic genotypes. A total of 35 ancestors originated in 11 different countries
were used to develop these 28 cultivars. Highest number of ancestors was from India. Use of
ancestors of both sativa and nivara species having indica and japonica types indicated the
collection of wide gene pool. Most of the ancestors were sativa (60.00%) and indica (65.71%).
Genetic erosion is observed in rice diversity therefore, in situ, on farm and ex situ conservations
are necessary for maintaining the genetic variation. Utilization of local landraces in breeding
program may be the good way of genetic resources conservation. Gene pool from these
landraces along with international gene pool could make towards success in developing high
yielding cultivars with wide adaptability and/or site specific. In this study, cultivars and
landraces surveyed represent a wide range of variation for different areas of origin and
adaptation. This genetic diversity is very useful for further rice improvement and should be
conserved both ex situ and in situ.Link for e-copy: http://elibrary.narc.gov.np/?r=56
Title : Wheat Genetic Resources in Nepal Material Type: printed text Authors: Joshi, Bal K., Author ; Ashok Mudwari, Author ; Madan P. Bhatta, Author Publication Date: 2006 Article on page: 1-9 p. Languages : English (eng) Keywords: Ancestor, landrace, origin, wheat gene pool Abstract: Genetic diversity must be maintained and utilized for sustainable agriculture development. The
amount of genetic diversity in the country depends on the number and diversity of the original
ancestors involved in the creation of a germplasm pool, wild relatives and existing landraces.
The objective of this research was to study the diversity of wheat gene pool present in the
Nepalese bread wheat cultivars and landraces that could help for developing conservation and
utilization strategy effectively. We examined the pedigrees of 35 Nepalese wheat cultivars and
surveyed the literature for distribution of landraces and wild relatives of wheat. Cultivated
landraces of spring and winter type, wild landraces and diploid species of wheat are found in
Nepal. There are 35 improved wheat cultivars, 540 landraces and 10 wild relatives of wheat.
Crosses between winter and spring wheat gene pools are far more common and offer a new
source of diversity. Mexico, India and Nepal are the origin countries for 35 cultivars. In Nepal
four cultivars were bred and developed using foreign landraces and maximum number of
cultivars was developed in Mexico. Lerma 52, first improved cereal variety to be released in the
history of cereal breeding in Nepal was released in 1960. A total of 89 ancestors originated in 22
different countries were used to develop these cultivars. Highest number of ancestors was from
India. Ancestors of both aestivum and durum species having winter, spring and intermediate
growth habit indicated the collection of wide gene pool. Most of the ancestors were aestivum
(76.40%) and spring growth habit (57.31%). Modern varieties are replacing the landraces and
improved old varieties resulted in the genetic erosion. Therefore, in situ, on farm and ex situ
conservations are necessary for maintaining these genetic variations. Unutilization of local
landraces in breeding program may be the major factor that causes to accelerate the genetic
erosion. Gene pool from these landraces along with international gene pool could make towards
success in developing high yielding cultivars with wide adaptability. In this study, cultivars and
landraces surveyed represent a wide range of variation for different areas of origin and
adaptation.Link for e-copy: http://elibrary.narc.gov.np/?r=40
in Nepal Agriculture Research Journal > Vol. 7 (2006) . - 1-9 p.[article] Wheat Genetic Resources in Nepal [printed text] / Joshi, Bal K., Author ; Ashok Mudwari, Author ; Madan P. Bhatta, Author . - 2006 . - 1-9 p.
Languages : English (eng)
in Nepal Agriculture Research Journal > Vol. 7 (2006) . - 1-9 p.
Keywords: Ancestor, landrace, origin, wheat gene pool Abstract: Genetic diversity must be maintained and utilized for sustainable agriculture development. The
amount of genetic diversity in the country depends on the number and diversity of the original
ancestors involved in the creation of a germplasm pool, wild relatives and existing landraces.
The objective of this research was to study the diversity of wheat gene pool present in the
Nepalese bread wheat cultivars and landraces that could help for developing conservation and
utilization strategy effectively. We examined the pedigrees of 35 Nepalese wheat cultivars and
surveyed the literature for distribution of landraces and wild relatives of wheat. Cultivated
landraces of spring and winter type, wild landraces and diploid species of wheat are found in
Nepal. There are 35 improved wheat cultivars, 540 landraces and 10 wild relatives of wheat.
Crosses between winter and spring wheat gene pools are far more common and offer a new
source of diversity. Mexico, India and Nepal are the origin countries for 35 cultivars. In Nepal
four cultivars were bred and developed using foreign landraces and maximum number of
cultivars was developed in Mexico. Lerma 52, first improved cereal variety to be released in the
history of cereal breeding in Nepal was released in 1960. A total of 89 ancestors originated in 22
different countries were used to develop these cultivars. Highest number of ancestors was from
India. Ancestors of both aestivum and durum species having winter, spring and intermediate
growth habit indicated the collection of wide gene pool. Most of the ancestors were aestivum
(76.40%) and spring growth habit (57.31%). Modern varieties are replacing the landraces and
improved old varieties resulted in the genetic erosion. Therefore, in situ, on farm and ex situ
conservations are necessary for maintaining these genetic variations. Unutilization of local
landraces in breeding program may be the major factor that causes to accelerate the genetic
erosion. Gene pool from these landraces along with international gene pool could make towards
success in developing high yielding cultivars with wide adaptability. In this study, cultivars and
landraces surveyed represent a wide range of variation for different areas of origin and
adaptation.Link for e-copy: http://elibrary.narc.gov.np/?r=40
