Intraspecific Crossing, Zygote Germination and F1 Progeny of Gonium pectorale.
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概要
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Intraspecific crossing, zygote germination and production of F1 progenies of heterothallic strains of Gonium pectorale isolated from Tibet, Nepal and the Ryukyu Islands (Japan) were carried out. The results were compared with similarity coefficients in isozyme pattern for each cross. It was revealed that the strains from Nepal and the Ryukyu Islands which had high sexual affinity for each other had high similarity coefficients (0.80-1.00 and 0.60-0.80), while Tibetan strains which had low sexual affinity with the strains from the other areas had low similarity coefficients below 0.60 in most crosses with them. It is possible that Tibetan strains are isolated by mountain barrier and have developed a different feature in their gene from the strains of the other strains. There was a decreasing tendency in gametic compatibility and in the ability to produce F1 progenies during routine culture maintenance. Ecological or evolutional meanings of the alteration of sex competence were discussed.
- 日本微生物生態学会・日本土壌微生物学会の論文
日本微生物生態学会・日本土壌微生物学会 | 論文
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