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 The early indica rice varieties (lines), the hybrid rice CMS lines, the restorer lines and some derived hybrid combinations were used as materials. The results showed that the cloud traits were unique to the low amylose content varieties (lines) The formation of the reason and the endosperm starch morphology and structure. Seed aging tests show that seed moisture and aging are two important conditions for rapid identification of cloud traits. Breeding practice can be high temperature drying and high temperature moisturizing pretreatment of two methods to quickly identify endosperm cloud traits, and as a marker early early specific removal of low amylose material