Relationship between Hypha Morphology andCordycepin Content of Different Cordyceps militaris Strains

Treadmill test was performed on the source of four strains of Cordyceps militaris,and under the same of culture conditions,their growth was observed and compared;Cordycepin was obtained by ultrasonic extraction from different strains of mycelia with the same age.The results showed that: the peak area and the cordycepin content showed good linearity and high precision.The content of the Cordyceps mycelium YJ11-3 is the highest,0.505%,followed by YJ11-1 and YJ11-4,and YJ11-2 is the lowest,only 0.097%;Wet weight of mycelia is ordered as YJ11-3YJ11-1YJ11-4YJ11-2;Wet weight and content of the Cordyceps mycelium is proportional to each other.