Characteristics of Flax Landrace Germplasms in Gansu Province

The important quality indexes of 116 landrace varieties of flax from Gansu were determined,including crude fat,stearic acid,palmitic acid,oleic acid,linoleic acid,and linolenic acid contents and iodine values,and their cluster analysis were conducted.It was shown that(1) in the varieities the crude fat contents averaged 37.48% with their CV at 3.8%;the stearic acid and oleic acid contents separately averaged(5.32)% and 29.05% and their CVs were separately 19.5% and 11.6%;The palmitic acid and linolenic acid and linoleic acid contents separately averaged 5.9%,48.76% and 10.95% and their CVs were separately(8.4)%,8% and 8%;The iodine values averaged 175.60 with its CV at 2.76%;(2) The varieties were divided into seven groups in the cluster analysis and they are subgroup b containing the highest stearic acid and oleic acid contents and the lowest linolenic acid content,subgroup d containing the highest linolenic acid content,subgroup e containing the highest crude fat content and the highest iodine value and the lowest oleic acid content,subgroup f containing the lowest stearic acid,subgroup g containing the highest palmitic acid content and the lowest iodine value.