摘要
以不同类型水稻品种为材料 ,分析了稻穗颖花开花日序对籽粒胚乳细胞数和米质形成的影响。研究发现 ,同一穗上随着开花日序的推迟 ,籽粒胚乳细胞数逐渐减少 ,垩白率、垩白度逐渐上升 ,糊化温度和直链淀粉含量逐渐降低。上述主要米质性状与胚乳细胞数密切相关 ,而与单个胚乳细胞重相关不显著。孕穗期去 1/ 2株或始穗期喷施 6 - BA[6 - (苄基 )腺嘌呤 ],籽粒的胚乳细胞数明显上升 ,垩白率、垩白度明显下降 ,糊化温度上升 ;孕穗期去 1/ 2叶 ,结果相反 ;表明由于胚乳细胞数的不同 ,造成了穗上籽粒间米质的差异。
Using different rice cultivars as materials, effect of flowering sequence on endosperm cells (ECs) and grain quality was analyzed. The results showed that with the delaying of anthesis of spikelets in a panicle, ECs decreased, chalky percentage (CP) and chalkiness (CN) increased while gelatinization temperature (GT) and amylose content (AC) decreased. Grain qualities significantly correlated with ECs, but not significantly correlated with single endosperm cell weight. ECs and GT increased significantly while CP and CN decreased when removing 1/2 plants at booting stage or spraying 6 BA [6 (benzyl) adenine] at early heading stage, and the results were reversed when cutting 1/2 leaves at booting stage. These results suggested that the difference of ECs resulted in different rice grain quality.The approaches to improving rice grain quality were discussed.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2001年第2期119-124,共6页
Chinese Journal of Rice Science
基金
农业部
江苏省作物栽培与生理重点开放实验室资助课题
