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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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