Abstract: 17 wilt-inducing isolates of Fusarium oxysporum f.sp. lini were obtained from the diseased flaxs from the four main flax pruduction regions, Inner Mongolia, Shanxi province, Hebei province, Gansu province, through cellection, isolation, single macroconidia purification, these isolates were classified into four types of es-terase isoenzyme by the electrophoretic technology, and the isolates from the same region belonged to the same type of esterase isoenzyme,so we called the types of esterase isoenzyme the ecotypes. The high susceptible flax line, 7528-4-2-1,was respectively inoculated by eight isolates. Result showed that the wilt-inducing abilities of the isolates coming the same region are not significant,that from different regions are significant.

Key words: Flax, Flax wilt, Inoculation, Electrophoretic

CLC Number: 

• S435.65