|Title:||水稻台農67號疊氮化鈉突變品系穎花分佈型式之研究||Other Titles:||Study on Spikelet Distribution Pattern of the Sodium Azide-Induced Mutants of Rice Variety Tainung 67||Authors:||鄭統隆
|Keywords:||水稻;穎花分布;突變體;疊氮化鈉;Rice;Spikelet distribution pattern;Mutant;Sodium aside||Issue Date:||Feb-2007||Publisher:||台灣農學會||Journal Volume:||8||Journal Issue:||1||Start page/Pages:||35-50||Source:||中華農學會報||Abstract:||
Five mutants derived from sodium aside mutagenesis with various spikelet distribution patterns on rice panicle were investigated and compared with its mother parent, TNG67 variety, for four crop seasons. The results have shown that the significant differences were observed in primary rachis-branches number, spikelet number on the primary rachis-branch, number of the secondary rachis-branch and number of spikelet on the secondary rachis-branch as compared with the characteristics of TNG67 variety. Most mutants and TNG67 produce 5~6 spikelets on the primary rachis-branch, but mutant SA0418 produced 7 spikelets on parts of its primary rachis-branch. No distinct difference in spikelet distribution on secondary rachis-branch was observed in the first crop season for two years but it was not stable in the second crop season. Mutant SA0418 produced less spikelets in the secondary rachis-branch as compared with TNG67, and most spikelets were found in the secondary rachis-branch, especially in the secondary crop season of year 2001. In mutant, SA0419, a large number of spikelets distributed in the secondary rachis-branch above the middle nodal in the first crop season providing a good characteristic for dry matter accumulation in rice panicle. In conclusion, spikelets distribution pattern of rice may have variable expressions in different year and crop season, and can also be altered by mutagenesis. Rice mutants with variations in spikelet distribution pattern provide good characteristics for further physiological study as well as variety improvement.
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