Chinese Journal of Rice Science

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Formation Basis of Rice Mist Endosperm Appearance and Its Rapid Identifying Factors

WU Dian-xing; XIA Ying-wu; LI Xu-cheng   

  1. (Institute of Nuclear Agricultural Sciences; Zhejiang University; Hangzhou 310029; China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-07-10 Published:2001-07-10

水稻胚乳外观云雾性状形成基础及其快速识别条件分析

吴殿星; 夏英武; 李旭晨   

  1. 浙江大学 原子核农业科学研究所,浙江 杭州 310029

Abstract: The differences in endosperm appearance were investigated among the varieties or lines of early indica, sterile lines, restorer lines and several combinations of hybrid rice after 3 month storage in room condition. The result indicated that the mist trait was specific endosperm appearance, which was closely related to low apparent amylose content, its formation basis was obviously reflected in the differences of starch structure and morphology. The experiment of seed aging revealed that seed moisture and aging were two key factors for rapid identifying mist trait. In breeding practice, two methods such as higher temperature or higher temperature with higher moisture pretreatment can be utilized to quickly recognize mist endosperm appearance, and can use the marker to conveniently eliminate low amylose materials in early generations.

Key words: rice, apparent amylose content, endosperm appearance, marker assisted selection

摘要: 以早籼稻新品种(系)、杂交水稻不育系、恢复系及其衍生的部分杂交组合为材料进行研究,发现云雾性状是低表观直链淀粉含量品种(系)特有的胚乳外观,其形成的原因和胚乳内淀粉的形态和结构有关。种子老化试验表明,种子水分和老化是快速识别云雾性状的两个重要条件。育种实践中可采用高温烘干和高温保湿预处理两种方法来快速识别胚乳云雾性状,并以此作为标记,早期特异性剔除低表观直链淀粉材料。

关键词: 水稻, 表观直链淀粉含量, 胚乳外观, 标记辅助选择