The invention relates to an asexual propagation method of
gracilaria lemaneiformis. The method comprises the following steps: (1) healthy and immature
gracilaria lemaneiformis is selected, washed for multiple times, and then flushed with disinfected
seawater to remove parasitic protozoan and epiphytic
hybrid algas on the surface of the
algae body, and after the
gracilaria lemaneiformis is cultured for one week by using the disinfected
seawater, the cultured
gracilaria lemaneiformis is repeatedly washed until the microscopic examination result shows that the surface of the
algae body is free of
hybrid algas, the washed
gracilaria lemaneiformis is soaked in a 1.5% KI solution for 10 minutes, then the soaked
gracilaria lemaneiformis is washed with the disinfected
seawater for 3 times, the washed gracilaria lemaneiformis is soaked for 10 seconds by using 70%
alcohol, and then the soaked gracilaria lemaneiform is washed with the disinfected seawater for 3 times; (2) the treated gracilaria lemaneiformis
algae body is
cut into
cutting sections of 2-4 mm by using a
scalpel blade, and the
cut gracilaria lemaneiformis is cultured in a PES culture solution containing 0.25mg / mL 6-BA in dark for 7 days; and (3) the culture condition is changed as follows: the temperature is 17 DEG C, the illumination intensity is 10 + / -2 [mu]E.m<-2>.s<-1>, the
light cycle is 16h: 8h (Light: Dark). The asexual propagation method is simple and easy to operate and short in
induction period, provides a technical method for manual breeding and
seedling culture of the gracilaria lemaneiformis, and provides a support for seed production and propagation expanding.