Abstract
The Lao People's Democratic Republic (Lao PDR) lieswithin the center of domestication of Asian rice(Oryza sativa L.). Many traditionalvarieties are grown in the rainfed lowland and rainfed uplandecosystems, but there is a danger of genetic erosion, particularly inthe lowlands, as farmers adopt improved varieties. The Lao Ministryof Agriculture and Forestry (MAF) and the InternationalRice Research Institute (IRRI) jointly explored most of therice growing areas between October 1995 and April 2000 and collected13192 samples of cultivated rice, and 237 samples of six wild ricespecies. Cultivated samples were classified according to ecosystem,endosperm type and maturity. The numbers of samples collected fromthe northern, central and southern regions were 5915(44.8%), 4625 (35.1%) and 2652(20.1%) respectively. More samples(55.9%) were collected from the uplands than fromlowland sites. Most samples (85.5%) had glutinousendosperm. Almost half the samples were medium maturing(47.1%), with approximately an equal number of earlyand late maturing forms. Apart from some localized areas whereaccessibility was restricted, the collection is representative of therice genetic resources of the whole country. A genebank formedium-term storage was established near Vientiane. Forlong-term conservation, duplicate samples were sent to theInternational Rice Genebank at IRRI in the Philippines.
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Appa Rao S., Bounphanouxay C., Phetpaseut V., Schiller J.M., Phannourath V. and Jackson M.T. 1997a. Collection and pre-servation of rice germplasm from southern and central regions of the Lao PDR. Lao J. Agric. Forestry 1: 43–56.
Appa Rao S., Bounphanousay C., Schiller J.M., Alcantara A.P. and Jackson M.T. 2001. Genetic Resources of the Lao PDR. 2. Naming of Traditional Rice Varieties by Farmers. Genet. Res. Crop. Evol.
Appa Rao S., Phetpaseut V., Bounphanousay C. and Jackson M.T. 1997b. Spontaneous interspecific hybrids in Oryza in Lao PDR. Int. Rice Res. Notes 22(1): 4–5.
Batson W. 1991. After the revolution: ethnic minorities and the new Lao state. In: Zasloff J.J. and Unger L. (eds), Laos: Beyond the Revolution. Macmillan, London, pp. 133–158.
Goudineau Y. (ed.) 1997. Resettlement and social characteristics of new villages: basic needs for resettled communities in the Lao PDR Vol. 1. UNDAP, Vientiane, Lao PDR.
Roder W., Keoboulapha B., Vannalath K. and Phouaravanh B. 1996. Glutinous rice and its importance for hill farmers in Laos. Econ. Bot. 50: 401–408.
Tanaka K. 1993. Farmer's perceptions of rice-growing techniques in Laos: ‘primitive’ or ‘thammasat’?. Southeast Asian Stud. 31: 132–140.
UNDP (United Nations Development Program) Lao PDR 1998. Development Cooperation Report 1997.
Watabe T. 1976. The glutinous rice zone in Thailand: patterns of change in cultivated rice. In: Ichimura S. (ed.), Southeast Asia— Nature, Society, and Development—Contributions to Southeast Asian Studies. University Press of Hawaii, Honolulu, pp. 96–113.
Worner W.E. 1997. Lao agriculture in transition. In: Mya Th and Tan J.L.H. (eds), Laos' Dilemmas and Options: The Challenges of Economic Transition in the 1990s. St. Martin's Press, New York.
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Appa Rao, S., Bounphanousay, C., Schiller, J. et al. Collection, classification, and conservation of cultivatedand wild rices of the Lao PDR. Genetic Resources and Crop Evolution 49, 75–81 (2002). https://doi.org/10.1023/A:1013843329905
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DOI: https://doi.org/10.1023/A:1013843329905