东北地区旱直播粳稻种质资源品质性状分析及综合评价OA北大核心CSTPCD
Analysis and Comprehensive Evaluation of Quality Traits of Dry Direct-seeded Japonica Rice Germplasm Resources in Northeast China
系统评价旱直播稻种质资源品质性状多样性,为水稻种质资源创新和品质育种提供理论依据.以79份粳稻种质为材料,对稻米的加工品质、外观品质、营养品质、蒸煮食味品质和淀粉糊化特征参数进行遗传多样性分析和相关分析,利用主成分分析法、隶属函数法以及聚类分析对水稻品种进行综合品质评价和基因型差异分类.试验结果表明:旱直播水稻种质资源在多个品质性状上均表现出较为丰富的变异,所测定性状的变异系数为1.63%～62.69%,其中,垩白度的变异系数最大.相关分析发现各项品质指标间、品质指标与淀粉糊化特征参数间均存在显著的相关性.利用主成分分析提取4个主成分,贡献率分别为38.272%、17.063%、12.188%和8.297%,累积贡献率达75.819%.根据各主成分特征向量和各性状指标的因子载荷,计算出综合品质评价D值,并对D值进行聚类分析,将供试材料划分为高品质型、中等品质型和低品质型3类,据此筛选出整精米率、直链淀粉含量、最高黏度、最低黏度、最终黏度作为直播稻品质鉴定的关键指标.各项品质指标与综合评价D值的相关分析结果进一步证实了所筛选指标的代表性.综上,用综合评价D值可以准确、客观地评价旱直播粳稻的综合品质.
A systematic evaluation of the quality traits diversity of dry direct-seeded rice germplasm resources provides a theoretical basis for the innovation of rice germplasm resources and quality breeding.Using 79 japonica rice germplasms as materials,genetic diversity analysis and correlation analysis were conducted on the processing quality,appearance quality,nutritional quality,cooking and eating quality,and starch pasting characteristic parameters of rice.Principal component analysis,membership function method,and cluster analysis were used to comprehensively evaluate the quality of rice varieties and classify genotype differences.The experimental results showed that the dry direct-seeded rice germplasm resources exhibited relatively rich variation in multiple quality traits,with the coefficient of variation of the measured traits ranging from 1.63%to 62.69%,among which the coefficient of variation of chalkiness degree was the largest.Correlation analysis revealed significant correlations among various quality indicators and between quality indicators and starch pasting characteristic parameters.Four principal components were extracted using principal component analysis,with contribution rates of 38.272%,17.063%,12.188%,and 8.297%,respectively,and a cumulative contribution rate of 75.819%.Based on the feature vectors of each principal component and the factor loadings of each trait indicator,the comprehensive quality evaluation D value was calculated and subjected to cluster analysis,categorizing the tested materials into three types:high-quality,medium-quality,and low-quality.Accordingly,the key indicators for identifying the quality of direct-seeded rice were selected as head rice rate,amylose content,peak viscosity,trough viscosity,and final viscosity.The correlation analysis results between each quality indicator and the comprehensive evaluation D value further confirmed the representativeness of the selected indicators.In summary,the comprehensive evaluation D value can accurately and objectively evaluate the overall quality of dry direct-seeded japonica rice.
梁超;卢子庆;李佳沅;王誉瑶;闫海凤;李漪濛;刘俊峰;周婵婵;王术
沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161沈阳农业大学农学院,沈阳 110161
农业科学
水稻旱直播种质资源品质综合评价
ricedry direct-seededgermplasm resourcesqualitycomprehensive evaluation
《沈阳农业大学学报》 2024 (6)
641-650,10
国家重点研发项目(2016YFD0300104)
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