寒地水稻种质资源品质性状特性及聚类分析研究

为促进寒地水稻优质米的选育,以162份寒地水稻种质资源为材料,对糙米率、精米率、整精米率、粒长、粒宽、长宽比、垩白率、直链淀粉含量、蛋白质含量9个品质性状进行变异分析、相关分析和聚类分析。结果表明:寒地水稻种质资源品质性状间差异较大,变异丰富;各品质性状之间具有相关性;聚类分析结果将寒地种质资源分为6类,第I类水稻种质长宽比较高,垩白率较低;第II类水稻种质糙米率最高,长宽比最低;第III类水稻种质直链淀粉含量较高;第IV类水稻种质精米率和整精米率最高;第V类水稻种质垩白率为最低,长宽比为最高;第VI类水稻种质直链淀粉含量和蛋白质含量最高。

Study on Quality Characteristics and Cluster Analysis of Rice Germplasm Resources in Cold Region

In order to breeding high quality rice in cold region ,clear rice germplasm resources quality character‐istics in cold region and provide theoretical basis for parent selection of rice quality breeding in cold region ,169 germplasm resources of rice in cold region were used as the experimental material ,variation analysis ,correla‐tion analysis and cluster analysis were carried out based on nine quality traits which were the brown rice rate , the polished rice rate ,the head rice rate ,the length and width of the rice ,the ratio of length and width of the rice ,chalkiness ratio in the rice grain ,amylose content and protein content .The result showed that the differ‐ence and variation among the quality characteristics of rice in cold region germplasm were abundant ;There was correlation between the quality characteristics ;the germplasm resources of rice in cold region was divided into six categories by cluster analysis ,the ratio of length and width of category I was longer and the chalkiness ratio was the zower ;the brown rice rate of category Ⅱ was the highest ,and the the ratio of length and width was the lowest ;amylose content of category Ⅲ was the lowest ;the polished rice rate and the head rice rate of cate‐gory IV were the highest ;chalkiness ratio of category V was the lowest ,and the ratio of length and width was the highest ;amylose content and protein content of category VI were the highest .