スギタマバエ抵抗性の子供苗への遺伝

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Controlled pollination was carried out among nine clones of Cryptomeria japonica, four of which have been proved to be resistant to the attack of the gall midge, Contarinia inouyei MANI, and others have been proved to be susceptible, or their resistance has not been clarified. Five-month-old seedlings grown from the cross-pollinated seeds were transplanted in pots and put under the canopy of the Cryptomeria stand suffering from attack by the gall midge. In the next year, the seedlings were seriously infested. Statistically significant differences in injury were found among families. Resistant clone Nagasaki-syo-1 transmitted its resistance more or less to all its progenies. On the other hand, another resistant clone Huzitu-10 produced susceptible families except one mated with the resistant clone Nagasaki-syo-1. Thus, these two resistant clones seem to be different in their genetic background. Possible segregation could be seen in some families but not in others. The results described above suggest that gall midge resistance is probably controlled by plural loci of major genes. Natural inoculation of the same seedlings was repeated in the next year by the same method, but the injury was far less serious this time. However, it was found that the seedlings which were injured more seriously had been highly injured in the previous year's test. This observation suggests that the results obtained in the first year are fairly reliable.
日本森林学会の論文
1976-12-25

スギタマバエ抵抗性の子供苗への遺伝

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