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为加强滇型优质杂交粳稻的选育,利用快速黏度分析仪,对云南农业大学稻作研究所保存的159份滇型杂交粳稻保持系稻米RVA谱特征值进行了主成分分析和聚类分析,并与云南优质软米云恢290的RVA特征值进行比较和判别。主成分分析表明,与稻米口感品质有关的8个RVA指标可归为软硬、胶稠、回生这3个主成分因子,这3个主成分累计贡献率达89.64%;聚类分析结果显示,供试的保持系材料可分为2大类型,Ⅰ类包括了147份(占比92.45%),又可分为3个亚类;贝叶斯判别分析显示,Ⅰ-1和Ⅰ-3亚类稻米的RVA特征值与云恢290相符性最高。
In order to enhance the breeding of Dian-type high-quality japonica hybrid rice, principal component analysis and cluster analysis were performed on the RVA profile of 159 Dian-type hybrid japonica rice maintainer lines preserved by Rice Research Institute of Yunnan Agricultural University using rapid viscosity analyzer. And compared with the RVA eigenvalue of Yunnan high-quality soft rice Yunhui 290. The principal component analysis showed that the eight RVA indicators related to rice texture could be classified into three principal component factors: hard and soft, thick gel, and rejuvenation. The cumulative contribution rate of the three principal components was 89.64%. According to the cluster analysis, There are two major types of materials for the maintainer line in the trial, including Ⅰ (147) (92.45%) and 3 subtypes (Bayesian discriminant analysis). The results of Ⅰ-1 and Ⅰ-3 The RVA eigenvalue of rice was the highest with Yunhui 290.