チャ遺伝資源の輪斑病抵抗性の特性評価

概要

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For the breeding of varieties resistant to tea gray blight caused by Pestalotiopsis longiseta (Spegazzini) Dai et Kobayashi, varietal differences of resistance to the fungus were investigated in 195 cultivars and genetic resources of tea. The resistance to the disease was classified into 5 grades from high resistance to hight susceptibility based on the rate of formation and the size of zonate spot lesions.<BR>In resistance to tea gray blight, most of the Japanese local varieties were resistant, but some cultivated varieties and breeding lives such as Sayamamidori, Yabukita, Toyoka, Hokumei, Asatsuyu, Natsumidori, Okumusashi and Saemidori for green tea were susceptible or slightly susceptible.<BR>The Japanese local varieties were almost susceptible, China type plants were the middle susceptible and Assam hybrids were slightly susceptible.
日本茶業技術協会の論文