黄背木耳是毛木耳中品质最好的一种 ,是我国重要栽培耳类。通过连续三年的耳片组织分离 ,分别获得Ap2 - 2 ,Ap6和Ap8三个菌种。经与原始菌株比较试验表明 ,组织分离菌株彼此之间及与原始菌株之间都有拮多抗线产生 ;在菌丝长势上 ,Ap6菌株的菌丝体明显比其他菌株旺盛 ,而其余菌株在菌丝长势上无明显差异 ;在产量上表现出随着分离年限的缩短 ,产量呈递增趋势 ,组织分离菌株Ap2 - 2 ,Ap6和Ap8分别比原始菌株增产2 7 76 % ,33 42 %和 6 0 2 4%。 Yellow back fungus is the best quality of the fungus, is an important ear cultivated in China. Through three consecutive ear tissue isolation, three strains of Ap2 - 2, Ap6 and Ap8 were obtained respectively. The comparison with the original strain showed that there were antagonistic lines between the tissue isolates and the original strains. On the hypha growth, the mycelium of Ap6 was obviously stronger than other strains, The results showed that there was no significant difference in the growth of mycelia. The yield showed an increasing trend with the shortening of the isolation period. The strains Ap2 - 2, Ap6 and Ap8 were increased by 27.6%, 33.42% and 6% 0 2 4%.