基于热图和聚类分析的马铃薯矿质元素含量评价

Evaluation of Potato Mineral Element Content Based on Heatmap and Cluster Analysis

为提升马铃薯块茎的营养品质,助力马铃薯主食化的发展,本研究以国际马铃薯中心(CIP)引进的彩色二倍体资源作为亲本筛选的杂交后代为实验材料,测定7种矿质元素含量,通过描述性分析、相关性分析、热图(Heatmap)及聚类分析,综合评价26份资源的矿质元素含量,筛选出优异基因型,为马铃薯品质育种提供杂交亲本。结果表明,26份资源可聚类成6大类,第一类、第二类和第三类富含多种矿质元素,可作为杂交亲本;相关性分析表明,Zn元素与P、Mg、Ca元素,Ca元素与Mg、P元素之间同时存在较强的正相关。筛选出的马铃薯种质资源富含多种矿质元素,非常适合作为品质育种的杂交亲本,同时将Zn元素含量作为育种的目的性状是提升马铃薯营养品质的有效途径。

In order to improve the nutritional quality of potato and promote the development of potato as staple food,the hybrid progeny of the diploid resources introduced by the International Potato Center(CIP)was used as the experimental material to determine the content of seven mineral elements,through descriptive analysis;correlation analysis,heatmap and cluster analysis,comprehensive evaluation of the mineral elements content of 26 potato germplsm,select excellent genotypes,providing hybrid parents for potato quality breeding.The results showed that 26 potato material could be clustered into 6 categories,and the first,second and third types were rich in multiple mineral elements and could be us ed as hybrid parents;Correlation analysis showed that there is a strong positive correlation between Zn and P,Mg,Ca,Ca and Mg,P.The selected potato germplasm resources are rich in multiple mineral elements,which is very suitable as a hybrid parent for quality breeding.At the same time,the Zn content as the target trait of breeding is an effective way to improve the nutritional quality of potato.