疫病, 青枯病およびモザイク病 (PMMoV) 抵抗性のピーマン・トウガラシ類台木用品種 '台パワー' の育成とその特性

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  • 'Dai-Power', a Pepper (Capsicum annuum L.) Rootstock Cultivar Resistant to Phytophthora Blight, Bacterial Wilt, and PMMoV
  • エキビョウ アオガレビョウ オヨビ モザイクビョウ PMMoV テイコウセイ ノ ピーマン トウガラシルイ ダイギ ヨウヒンシュ ダイ パワー ノ イクセイ ト ソノ トクセイ

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In Japan, hot and sweet peppers suffer serious damage from three soilborne diseases : Phytophthora blight, bacterial wilt, and pepper mild mottle virus (PMMoV). It is difficult to prevent these diseases by cultural control, and no cultivars have strong resistance to them. Resistant cultivars need to be developed. 'Dai-Power', a rootstock cultivar resistant to all three diseases, was developed at the National Institute of Vegetable and Tea Science, Japan. It was selected from a cross between 'Bellmasari', which is resistant to PMMoV (P_1.2), and an F_4 plant derived from a cross between 'Mie-Midori', which is resistant to bacterial wilt, and SCM 334, which is resistant to Phytophthora blight. The F_4 line, 'Tougarashi Ano 4', was self-pollinated, and selection for resistance to Phytophthora blight and bacterial wilt was repeated until F_8 seeds were obtained. The line was released as 'Dai-Power' in 2008. 'Dai-Power' possesses strong resistance to Phytophthora blight and bacterial wilt and is assumed to have an L^3 gene for PMMoV resistance. Its resistance to Phytophthora blight is comparable to that of SCM 334 and the rootstock cultivars 'Suketto C' and 'Kataguruma' and is higher than that of 'Bellmasari'. Its resistance to bacterial wilt is higher than that of 'Mie-Midori' and 'Bellmasari'. The yield of sweet pepper on 'Dai-Power' rootstock is the same as that on 'Suketto C' and 'Bellmasari'. The resistance of 'Dai-Power' to Phytophthora blight and bacterial wilt is not complete, so growers still need to use soil sterilization. When growers use 'Dai-power' as a rootstock, we recommend that they use a scion cultivar with the L^3 gene.

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