内蒙古农业大学学报(自然科学版)

为丰富内蒙古马铃薯种质资源，本研究对不同的杂交组合群体共325份材料的18个性状开展统计学调查、相关性检测、主成分分析和系统聚类分析，对筛选出的9个新品系进行SSR指纹图谱构建并进行综合评价。结果表明：325份供试材料的18个性状的遗传多样性指数在0.26～2.03；相关性分析发现，主茎数与分枝数的相关系数最高；主成分分析将8个数量性状简化为4个主成分，累计贡献率达90.717%；聚类结果显示，325份材料可分为5个类群；综合评分筛选出9个适宜内蒙古种植的新品系，通过筛选出的8对SSR多态性引物，扩增出98个等位位点、84个多态性位点。综合评价与SSR分析相结合，新品系‘Y37-99’综合得分最高，可作为新品种进行下一步培育。本研究结果为马铃薯新品种的培育提供了理论参考。

In order to enrich the potato germplasm resources in Inner Mongolia, this study carried out statistical investigation, correlation detection, principal component analysis and systematic cluster analysis on eighteen traits of 325 materials from different hybrid combinations, and then constructed SSR fingerprints of nine new strains screened for comprehensive evaluation. The genetic diversity index of eighteen traits of 325 tested materials ranged from 0. 26 to 2. 03. The correlation analysis revealed that the correlation coefficient between the number of main stems and the number of branches was the highest. The principal component analysis simplified the eight quantitative trait indices into four principal components, with a cumulative contribution rate of 90. 717%. The clustering results showed that the 325 materials could be divided into five groups. Nine new strains suitable for cultivation in Inner Mongolia were selected through comprehensive scoring. Through the eight pairs of SSR polymorphic primers selected, 98 alleles and 84 polymorphic loci were amplified. The comprehensive evaluation was consistent with the SSR analysis, the new strain 'Y37-99' had the highest comprehensive score and could be used for further breeding as a new variety. The results of this study provided a theoretical reference for the breeding of new potato varieties.