Comprehensive Evaluation of Yield and Nutritional Quality of Different Potato Varieties in Daliangshan Zone
（1Chengdu Academy of Agriculture and Forestry Sciences，Chengdu 611130，Sichuan，China；2Key Laboratory of Integrated Management of Crop Disease and Pests，Ministry of Education，Nanjing Agricultural University，Nanjing 210095，Jiangsu，China；3Institute of Agricultural Resources and Environment，SAAS，Chengdu 610066，Sichuan，China；4Yuanye Agricultural Development Co.，Ltd. of Xide County，Liangshan 616750，Sichuan，China）
Abstract：Abstract：In order to screen potato varieties suitable for cultivating in Daliangshan zone of Sichuan，12indicators for yield and nutritional quality of 14 potato varieties were measured．The overall performance ofyield and quality was evaluated by combining principal component analysis，membership function method，and system clustering analysis．The results showed that the coefficients of variation of tuber number perplant，fresh weight of single tuber，tuber fresh weight per plant，yield，and reducing sugar content allexceed 30%．Correlation analysis showed that the tuber fresh weight per plant was very significantly positivelycorrelated with fresh weight of single tuber，yield，and protein content．There was very significantly positiverelationship between dry matter content with starch content，and protein content．The fresh weight of singletuber was significantly negatively correlated with VC and zinc content，while protein content and potassiumcontent were very significantly negatively correlated．The result of principal component analysis showedthat the 12 indicators could be represented by 4 principal components，and the cumulative contribution rateof variance reached 86.040%．The 14 varieties were further divided into 3 categories using the membershipfunction method and systematic cluster analysis，and 6 varieties with better overall performance were screenedout，namely ‘Chuanliangshu No.10’，‘Qingshu No.9’，‘Chuanyu 50’，‘Chuangliangyu 13’，‘Yunshu108’and‘Chuanyu No.22’．
