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| Analysis of Principal Component and Cluster Analysis of Main Agronomic Traits of Nantong Lentils |
| JIANG Yong-ping，QIU Hai-rong，ZHANG Hong-juan，SONG Yi-ming* |
| （Institute of Agricultural Sciences of the Changjiang River Bank District，Nantong 226541，Jiangsu，China） |
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Abstract Taking 16 cultivars of Nantong lentils〔Lablab purpureus（L.）Sweet〕as experimental material，we analyzed the principal components of 10 major agronomic traits using principal component analysis and cluster analysis to investigate the genetic distance and the main factors affecting yield of lentils．The results showed that under the premise of keeping 84.889 3% of information amount，10 agronomic traits could be simplified as the following 4 principal components：grain type factor，grain weight factor Ⅰ，pod type factor and grain weight factor Ⅱ．During the breeding process，the reasonable principal component values should be determined combining with the breeding objectives．The genetic distances between these 16 varieties were 0.886 6-7.775 7，and the average was 4.047 4．These 16 varieties could be divided into 4 classes，pod color and geographical source could not be used as the basis for judging germplasm genetic differences.
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Received: 26 January 2015
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