馬鈴薯の疫病抵抗性に関する研究 : III.馬鈴薯種間雑種の疫病菌系統人為接種に対する反応について

概要

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Fifteen demissum hybrids have been inoculated with three strains of Phytaphtora iufestales, H_1, H_2 and H_3 on both leaves and tubers in 1954. Three types have been distinguished in reactions to strains of both leaves, and tubers ; I, resistant to s,train H1 and H_2 and susceptible to strain H_3 ; II, resistant to strain H_1 and H_3 and susceptible to strain H_2 ; and III resistant to all strains applied. Of thes,e, the type 11 is of weaker kind, giving mycelial growth to some exlent in tuber test (table 3). Nearly complete positive correlation between leaf and tuber res,istance has been observed (41 out of 42). This may have resulted from a little' different way of qualifying resistance in tubers. In this test tubers were put in category of resistant' when they gave brown discoloration upon, inoculation earlier than the appearance of aerial mycelium. This has been introduced on the basis, of the idea that the genes for resistance act as accelerators, of a defence reaction, that is has,ten the death of cells infected and do not directly affect the mycelial growth which will be conditioned by secondary effects or some other factors., such as. nutrition available for the. fungrus..
日本育種学会の論文
1957-03-25