糜子优异种质资源品质性状分析与综合评价

nalysis and Comprehensive Evaluation of Quality Traits of Prosomillet Germplasm Resources

系统评价糜子种质资源品质性状多样性,为糜子种质资源创新和品质育种提供理论依据。本研究对301份糜子种质资源的外观品质、营养品质、糊化特性进行了遗传多样性、相关性和主成分分析。试验结果表明,糜子种质资源在主要品质性状上均表现出较为丰富的变异。直链淀粉含量与红绿值、千粒重、谷值粘度、终值黏度、回生值、糊化时间、糊化温度呈极显著正相关,与峰值黏度、破损值呈极显著负相关;蛋白质含量与红绿值、峰值黏度、谷值粘度、破损值、终值黏度呈极显著负相关;脂肪含量与红绿值、千粒重、谷值粘度、破损值、终值黏度呈极显著负相关。通过对17个品质指标进行主成分分析,提取出4个主成分,累计贡献率达到79.00%,表明4个主成分反映了糜子资源大部分的性状信息。

The comprehensive evaluation of quality trait diversity of prosomillet germplasm resources provided a theoretical basis for germplasm resource innovation and quality breeding.In this study,the genetic diversity,correlation,and principal component analysis of appearance quality,nutritional quality,and gelatinization characteristics of 301 prosomillet germplasm resources were conducted.The results showed great variations in the main quality traits of germplasm resources tested.The amylose content was positively correlated with red-green value,1000-grain weight,valley viscosity,final viscosity,setback,gelatinization time,and gelatinization temperature,and negatively correlated with peak viscosity and breakdown.There was a significant negative correlation between protein content and red-green value,peak viscosity,valley viscosity,breakdown,and final viscosity.Fat content was negatively correlated with red-green value,1000-grain weight,valley viscosity,breakdown,and final viscosity.Through principal component analysis of 17 quality indexes,4 principal components were extracted,with a cumulative contribution rate of 79.00%,indicating that the 4 principal components reflected most of the trait information of broomcorn millet resources.