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Variation in rice landraces adapted to the lowlands and hills in Nepal

Published online by Cambridge University Press:  22 November 2007

R. C. Sharma ,
N. K. Chaudhary ,
B. Ojha ,
L. Yadav ,
M. P. Pandey  and
S. M. Shrestha
R. C. Sharma*
Affiliation:
Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal
N. K. Chaudhary
Affiliation:
Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal
B. Ojha
Affiliation:
Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal
L. Yadav
Affiliation:
Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal
M. P. Pandey
Affiliation:
Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal
S. M. Shrestha
Affiliation:
Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal
*
*Corresponding author: E-mail: [email protected]
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Abstract

The landraces of rice (Oryza sativa L.) possess wide diversity, which needs to be properly characterized for their use in genetic improvement. Replicated field studies were conducted in 1998, 1999 and 2000 at two sites in Nepal to determine diversity in 183 landraces of rice adapted to the lowlands and the hills in Nepal. Fourteen improved genotypes were also used for comparison. Thirteen agronomic traits were investigated. Shannon–Weaver diversity index (H) and Simpson's index of diversity (D) were estimated to determine the level of genetic richness among the landraces. The landraces differed significantly for all traits. Except for plant height and maturity, at least one of the landraces compared well with the performance of improved cultivars. A principal component analysis separated the lowland- and hill-adapted landraces into two broad groups.

Keywords

genetic diversitylandracesNepalOryza sativarice
Type
Research Article
Information
Plant Genetic Resources , Volume 5 , Issue 3 , December 2007 , pp. 120 - 127
Copyright
Copyright © NIAB 2007

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References

Allard, RW (1965) Genetic systems associated with colonizing ability in predominantly self-pollinated species. In: Baker, HG and Stebbins, GL (eds) Proceedings of the First International Union of Biological Sciences Symposium. New York: Academic Press, pp. 49–75.Google Scholar
Bajracharya, J, Steele, KA, Jarvis, DI, Sthapit, BR and Witcombe, JR (2006) Rice landrace diversity in Nepal: variability of agro-morphological traits and SSR markers in landraces from a high-altitude site. Field Crops Research 95: 327–335.Google Scholar
Bennett, SJ (1999) Ecotypic variation between and within two populations of Trifolium tomentosum (woolly clover) from Syria and Western Australia: its success as a colonising species. Australian Journal of Agricultural Research 50: 1443–1450.Google Scholar
Chaudhary, P, Gauchan, D, Rana, RB, Sthapit, BR and Jarvis, DI (2004) Potential loss of rice landraces from a Terai community in Nepal: a case study from Kachorwa, Bara. Plant Genetic Resource Newsletter 137: 14–21.Google Scholar
Falconer, DS (1981) Introduction to Quantitative Genetics. 2nd edn. New York: Longman.Google Scholar
Gauchan, D, Sthapit, BR and Jarvis, DI (eds) (2003) Agrobiodiversity Conservation On-Farm: Nepal's Contribution to a Scientific Basis For National Policy Recommendations. Rome, Italy: PGRI.Google Scholar
Gauchan, D, Smale, M and Chaudhary, P (2005) Market-based incentives for conserving diversity on farms: the case study of rice landraces in central Tarai, Nepal. Genetic Resources and Crop Evolution 52: 293–303.Google Scholar
Glaszmann, JC and Arraudeau, M (1986) Rice plant type variation: ‘Japonica’–‘Javanica’ relationships. Rice Genetic Newsletter 3: 41–43.Google Scholar
Hobbs, PR and Giri, GS (1997) Reduced and zero-tillage options for establishment of wheat after rice in south Asia. In: Braun, H-J, Altay, F, Kronstad, WE, Beniwal, SPS and McNab, A (eds) Wheat: Prospects for Global Improvement. Dordrecht: Kluwer Academic Publishers, pp. 455–465.CrossRefGoogle Scholar
IRRI (1996) Standard Evaluation System for Rice. 4th edn. Los Baños, Philippines: International Network for Genetic Evaluation of Rice, Genetic Resource Center.Google Scholar
IRRI (2005) Rice Knowledge Bank. Los Baños, Philippines: International Rice Research Institute. www.knowledgebank.irri.org (verified on 15 December, 2005).Google Scholar
Jarvis, D, Sthapit, B and Sears, L (eds) (2000) Conserving Agricultural Biodiversity in situ: A Scientific Basis for Sustainable Agriculture. Rome, Italy: International Plant Genetic Resources Institute.Google Scholar
Joshi, KD and Witcombe, JR (2003) The impact of participatory plant breeding (PPB) on landrace diversity: a case study for high-altitude rice in Nepal. Euphytica 134: 117–125.CrossRefGoogle Scholar
Karki, PB (1989) Sources of multiple resistance to rice blast (Bl) and bacterial blight (BB) in Nepal. International Rice Research Newsletter 14: 10–11.Google Scholar
Lu, BR (1999) Need to conserve wild rice species in Nepal. International Rice Research Notes 24: 43.Google Scholar
Lu, JJ and Chang, TT (1980) Rice in the temporal and spatial perspectives. In: Luh, BS (ed.) Rice: Production and Utilization. Westport, Connecticut, USA: AVI Publishing, pp. 1–74.Google Scholar
MINITAB (2000) Statistical Software. MINITAB Release. 13.20. www.minitab.com.Google Scholar
Nagamine, T (1992) Altitudinal cline in chilling response in indigenous rice varieties collected from Nepal. Japanese Journal of Breeding 42: 309–317.Google Scholar
Oka, HI (1958) Intervarietal variation and classification of cultivated rice. Indian Journal of Genetics and Plant Breeding 18: 79–89.Google Scholar
SAS Institute (2003) SAS 9.1 for Windows. Cary, North Carolina, USA: SAS Institute.Google Scholar
Steel, RGD and Torrie, JH (1980) Principles and Procedures of Statistics. New York: McGraw-Hill Book Company.Google Scholar
Sthapit, BR and Witcombe, JR (1998) Inheritance of tolerance to chilling stress in rice during germination and plumule greening. Crop Science 38: 660–665.CrossRefGoogle Scholar
Sthapit, BR, Witcombe, JR and Wilson, JM (1995) Methods of selection for chilling tolerance in Nepalese rice by chlordddophyll florescence analysis. Crop Science 95: 90–94.CrossRefGoogle Scholar
Suh, HS, Sato, YI and Morishima, H (1997) Genetic characterization of weedy rice (Oryza sativa L.) based on morpho-physiology, isozymes and RAPD markers. Theoretical and Applied Genetics 94: 316–321.Google Scholar
Whiteman, PTS (1985) The mountain environment: an agronomist's perspective with a case study form Jumla, Nepal. Mountain Research and Development 5: 151–162.Google Scholar
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