Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR
Genotype by environment (G×E) interactions for grain yield were investigated in 14 rice genotypes across eight rainfed lowland field environments in Lao PDR, in order to identify stable adapted cultivars for improved farmer livelihood and food security. G×E accounted for 20.3% of the total variance,...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Informa UK Limited
2017
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| Online Access: | https://hdl.handle.net/10568/164945 |
| _version_ | 1855542618268631040 |
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| author | Sengxua, Pheng Samson, Benjamin K. Bounphanousay, Chay Xayavong, Sisavanh Douangboupha, Khamsouk Harnpichitvitaya, Dome Jackson, Tamara M. Wade, Len J. |
| author_browse | Bounphanousay, Chay Douangboupha, Khamsouk Harnpichitvitaya, Dome Jackson, Tamara M. Samson, Benjamin K. Sengxua, Pheng Wade, Len J. Xayavong, Sisavanh |
| author_facet | Sengxua, Pheng Samson, Benjamin K. Bounphanousay, Chay Xayavong, Sisavanh Douangboupha, Khamsouk Harnpichitvitaya, Dome Jackson, Tamara M. Wade, Len J. |
| author_sort | Sengxua, Pheng |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Genotype by environment (G×E) interactions for grain yield were investigated in 14 rice genotypes across eight rainfed lowland field environments in Lao PDR, in order to identify stable adapted cultivars for improved farmer livelihood and food security. G×E accounted for 20.3% of the total variance, with three vectors from ordination analysis accounting for 75.1% of the G×E-SS, in 6 genotype × 6 environment groups. PCA1 indicated water-limited yield potential, PCA2 pre-flowering stress and PCA3 post-flowering stress. Genotype groups (G1–G6) differed in adaptation to these environments. G5 (VT450-2 and TSN9) were widely adapted and high-yielding. G6 (TDK11 and TDK37) were also high-yielding, topping the rankings in three environment groups, but yielded less in Phalanxay 2012 and Phalanxay 2011, where their phenology was unstable under stress. Other genotype groups showed specific adaptations, but failed to exceed yields of G5 and G6. Hence, VT450-2 and TSN9 (G5) were the preferred genotypes for rainfed lowland in southern Lao PDR, due to their high and stable grain yields. Stability in flowering time and high yield in rainfall deficit were desirable traits for improved farmer livelihood and food security |
| format | Journal Article |
| id | CGSpace164945 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace1649452025-12-08T09:54:28Z Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR Sengxua, Pheng Samson, Benjamin K. Bounphanousay, Chay Xayavong, Sisavanh Douangboupha, Khamsouk Harnpichitvitaya, Dome Jackson, Tamara M. Wade, Len J. Genotype by environment (G×E) interactions for grain yield were investigated in 14 rice genotypes across eight rainfed lowland field environments in Lao PDR, in order to identify stable adapted cultivars for improved farmer livelihood and food security. G×E accounted for 20.3% of the total variance, with three vectors from ordination analysis accounting for 75.1% of the G×E-SS, in 6 genotype × 6 environment groups. PCA1 indicated water-limited yield potential, PCA2 pre-flowering stress and PCA3 post-flowering stress. Genotype groups (G1–G6) differed in adaptation to these environments. G5 (VT450-2 and TSN9) were widely adapted and high-yielding. G6 (TDK11 and TDK37) were also high-yielding, topping the rankings in three environment groups, but yielded less in Phalanxay 2012 and Phalanxay 2011, where their phenology was unstable under stress. Other genotype groups showed specific adaptations, but failed to exceed yields of G5 and G6. Hence, VT450-2 and TSN9 (G5) were the preferred genotypes for rainfed lowland in southern Lao PDR, due to their high and stable grain yields. Stability in flowering time and high yield in rainfall deficit were desirable traits for improved farmer livelihood and food security 2017-10-02 2024-12-19T12:54:30Z 2024-12-19T12:54:30Z Journal Article https://hdl.handle.net/10568/164945 en Open Access Informa UK Limited Sengxua, Pheng; Samson, Benjamin K.; Bounphanousay, Chay; Xayavong, Sisavanh; Douangboupha, Khamsouk; Harnpichitvitaya, Dome; Jackson, Tamara M. and Wade, Len J. 2017. Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR. Plant Production Science, Volume 20 no. 4 p. 477-484 |
| spellingShingle | Sengxua, Pheng Samson, Benjamin K. Bounphanousay, Chay Xayavong, Sisavanh Douangboupha, Khamsouk Harnpichitvitaya, Dome Jackson, Tamara M. Wade, Len J. Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR |
| title | Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR |
| title_full | Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR |
| title_fullStr | Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR |
| title_full_unstemmed | Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR |
| title_short | Adaptation of rice (Oryza sativa L.) genotypes in the rainfed lowlands of Lao PDR |
| title_sort | adaptation of rice oryza sativa l genotypes in the rainfed lowlands of lao pdr |
| url | https://hdl.handle.net/10568/164945 |
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