论文部分内容阅读
通过对云南地方传统软米资源与粘米和檑米的直链淀粉含量及蛋白质的积累动态进行比较研究。结果表明,3种类型的稻米在籽粒灌浆过程中直链淀粉积累表现基本一致,以开花后20 d为转折点,日平均积累速度前期积累速度快,后期积累速度较缓慢,直链淀粉积累速率的顺序为粘米>云南软米>括米;3种类型的稻米在籽粒灌浆过程中蛋白质积累动态基本相似,籽粒的蛋白质百分含量,灌浆开始最高,而后逐渐下降。蛋白质含量的日平均积累速度顺序为檑米品种>软米品种>粘米品种,与直链淀粉积累动态相反,籽粒直链淀粉和蛋白质积累之间可能有一定的矛盾关系。开花后30 d内是软米品质形成的主要时期,可以把开花后30 d内气象生态条件作为云南软米生态区划重要指标。
A comparative study was conducted on the amylose content and the accumulation of protein in traditional soft rice resources in Yunnan Province and in gluten rice and rice. The results showed that the accumulations of amylose in the three types of rice were basically the same during grain filling. The turning point was 20 days after flowering. The average accumulation rate of early rice was faster at the early accumulation stage and slower at the late accumulation stage. The amylose accumulation rate The order of sticky rice> Yunnan soft rice> rice; The accumulation of protein in the three types of rice during grain filling process is similar, the protein content of grain, grain filling began highest, then gradually decreased. The average daily accumulation rate of protein content was in the order of rice varieties> soft rice varieties> glutinous rice varieties. In contrast with the dynamic accumulation of amylose, the amylose content and protein accumulation may have some contradictory relations. Within 30 days after flowering, it is the main period of soft rice quality formation that the meteorological and ecological conditions within 30 days after flowering can be taken as an important index for the ecological division of Yunnan soft rice.