Measurement and management of genotype-environment interaction (GxE) for the improvement of rainfed lowland rice yield in Cambodia

Basnayake, Jayampathi, Ouk, Makara, Votany, Thum, Kang, Sideth, Khon Hel, Pith, Fukai, Shu, Sarom, Men and Fischer, Ken (2004). Measurement and management of genotype-environment interaction (GxE) for the improvement of rainfed lowland rice yield in Cambodia. In: T. Fischer, N. Turner, J. Angus, L. McIntyre, M. Robertson, A. Borrell and D. Lloyd, New Directions for a Diverse Planet: Proceedings for the 4th International Crop Science Congress. 4th International Crop Science Congress, Brisbane, Australia, (1-6). 26 September-1 October 2004.


Author Basnayake, Jayampathi
Ouk, Makara
Votany, Thum
Kang, Sideth
Khon Hel, Pith
Fukai, Shu
Sarom, Men
Fischer, Ken
Title of paper Measurement and management of genotype-environment interaction (GxE) for the improvement of rainfed lowland rice yield in Cambodia
Conference name 4th International Crop Science Congress
Conference location Brisbane, Australia
Conference dates 26 September-1 October 2004
Proceedings title New Directions for a Diverse Planet: Proceedings for the 4th International Crop Science Congress
Place of Publication Gosford, N.S.W., Australia
Publisher The Regional Institute
Publication Year 2004
Sub-type Fully published paper
ISBN 1 920842 20 9
1-920842-21-7
Editor T. Fischer
N. Turner
J. Angus
L. McIntyre
M. Robertson
A. Borrell
D. Lloyd
Volume CD
Start page 1
End page 6
Total pages 6
Collection year 2004
Language eng
Abstract/Summary The magnitude and nature of genotype-by-environment interactions (G×E) for grain yield (GY) and days to flower (DTF) in Cambodia were examined using a random population of 34 genotypes taken from the Cambodian rice improvement program. These genotypes were evaluated in multi-environment trials (MET) conducted across three years (2000 to 2002) and eight locations in the rainfed lowlands. The G×E interaction was partitioned into components attributed to genotype-by-location (G×L), genotype-by-year (G×Y) and genotype-by-location-by-year (G×L×Y) interactions. The G×L×Y interaction was the largest component of variance for GY. The G×L interaction was also significant and comparable in size to the genotypic component (G). The G×Y interaction was small and non significant. A major factor contributing to the large G×L×Y interactions for GY was the genotypic variation for DTF in combination with environmental variation for the timing and intensity of drought. Some of the interactions for GY associated with timing of plant development and exposure to drought were repeatable across the environments enabling the identification of three-target populations of environments (TPE) for consideration in the breeding program. Four genotypes were selected for wide adaptation in the rainfed lowlands in Cambodia.
Subjects E1
300203 Plant Improvement (Selection, Breeding and Genetic Engineering)
620103 Rice
Q-Index Code E1

 
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Created: Thu, 23 Aug 2007, 20:06:21 EST