The Correlation Analysis Of Allium Maggot Resistance Performance And Index In Different Chinese Chives

The clustering analysis of Insect resistance of 20 Chinese chives cutivar were studied. On this basis that we analyzed the cluster and correlation analysis of allium maggot resistance .The results are as following:Firstly,The results showed that the resistance of 20 Chinese chive varieties were significantly different. Using three resistant indexs, field population density,number of injured /all and index of leaf injury as resistant appraisal standards. The clustering analysis of allium maggot resistance of were studied by the SAS. There had three Chinese chive varieties when the threshold T 0.7.Yu-Jiu 1 and nongdapengjiuNO.1 had the strong resistance; the varieties of Xue-Jiuwang, Zhu-Ganqing and 91-2 and Kuan -Jiuwang were the most susceptible, and the others were in between. In addition, the results indicated that there were most significant correlation among three resistant indexs, so it's not only simple and convenient but accurate to take one resistant index of three resistant indexs in investigating the varieties of allium maggot resistance.Secondly,The enzymes activity of POD,CAT and PAL were rising in different Chinese chives damaged by allium maggots. But the enzymes activity of CAT had different changes with different Chinese chives which damaged by allium maggots. The enzymes activity of POD and PAL of insect resistance varieties were increaser remarkably than the insect infection varieties, but the varying degree of cultivars were different. The activity of CAT had different changes . The enzymes activity of CAT of insect resistance varieties increased, but the enzymes activity of CAT of the insect infection varieties decreased .Thirdly, The contents of coarse-fibre,naphtha,soluble sugar,soluble protein, pigment, chlorophl-a and dissociative amino acids were studied at the peak of allium maggots occurred. The results showed that the contents of naphths, soluble sugar and dissociative amino acids of the insect resistance varieties are less than the insect infection varieties. The insect resistance varieties contained more soluble protein than the insect infection varieties. The contents of coarse-fibre, soluble protein, pigment and chlorophl-a had no law in the different resistant cultivars. The correlation analysis showed that the contents of naphtha,soluble protein and dissociative amino acids had distinct correlation with the resistance degree. The content of naphtha was the most important factor. And the negative correlation between the content of naphtha and dissociative amino acides and positive correlated. The positive correlated between the content of soluble protein and positive correlated.