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| Title | : | Physio-morphological Studies of F_1 Hybrids in Rice (Oryza sativa L.) : Photosynthetic ability and yield |
| Authors | : | Khan, Md. Nurul Alam
Murayama, Seiichi
Ishimine, Yukio
Tsuzuki, Eiji
Nakamura, Ichiro |
| Issue Date | : | Dec-1998 |
| Abstract | : | Photosynthetic ability in terms of CO_2 exchange rate and leaf area, dry matter accumulation(dry weight)and other important growth components along with yield and yield contributing characters in two F_1 hybrids of Akebono × Chiyonishiki(A×C)and Zenith × Akebono(Z×A)were studied. The photosynthetic rate at the flowering stage was lower than that at the panicle initiation stage in all the inbred parent cultivars and F_1 hybrids. Heterosis in photosynthetic rate was higher at the panicle initiation stage than that at the flowering stage. Pre-anthesis leaf area in the F_1 hybrid was significantly larger than that in the parent cultivars. However, the post-anthesis decline in leaf area was more rapid in the F_1 hybrids than in the parent cultivars and its magnitude was the highest in the F_1 hybrid of Z × A which was tall having long and curved panicles. Pre-anthesis dry matter accumulation in both hybrids was significantly higher in the F_1 plants than the parental cultivars, but post-anthesis dry matter accumulation in the F_1 hybrid was lower than the mid-parental value in Z × A. The degree of heterosis in grain yield varied with the hybrid combination, an average heterosis being 1.03. Heterosis in grain yield was closely associated with heterosis in harvest index. |
| Type Local | : | 雑誌掲載論文 |
| ISSN | : | 1343-943X |
| Publisher | : | The Crop Science Society of Japan |
| URI | : | http://hdl.handle.net/20.500.12000/4867 |
| Citation | : | Plant Production Science Vol.1 no.4 p.233 -239 |
| Appears in Collections | : | Peer-reviewed Journal Articles (Faculty of Agriculture)
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| Vol1No4p233-239.pdf | | 756Kb | Adobe PDF | View/Open |
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