1998 Volume 39 Issue 4 Article ID: jjom.H09-151
Variations in cultivation characteristics of Thai and Japanese stocks of oyster mushroom and their F1 hybrids were studied. Crossing experiments revealed that mating factors of the two stocks were compatible (A≠, B≠). In cultivation at 22°C, Thai stock flushed twice or more, and Japanese stock once or not at all. However at 15°C, Japanese stock normally flushed twice. While some F1 hybrids flushed once or not at all (F1-L), and others flushed twice or more (F1-H). The hybrids graded as F1-H were capable of fruiting well in a wider range of temperature than those graded as F1-L. In principal component analysis of data including days required for fruiting, fruiting productivity (yield), pileus color and shape, each stocks was compared on a Z-score diagram of their first and second principal components. The stocks of F1-H and F1-L hybrids formed each clusters on the diagram, and the Thai and Japanese parental stocks were located near or within the clusters of F1-H and that of F1-L, respectively. In fruiting characteristics, most members of both the clusters lay in the same area at 22°C, but at 15°C, they segregated in distinct areas. Some characteristics appeared to be linked and inherited. Introduction of Thai germplasm into Japanese stocks will be effective to improve their cultivation traits.
