青枯病および疫病抵抗性を有する台木用トウガラシ品種 'L4台パワー' および '台ちから' の育成経過とその特性

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タイトル別名
  • Development of Capsicum Rootstock Cultivars 'L4 Dai-Power' and 'Daichikara' with Resistance to Bacterial Wilt and Phytophthora Bligh
  • アオガレビョウ オヨビ ヤクビョウ テイコウセイ オ ユウスル ダイギヨウ トウガラシ ヒンシュ'L4ダイ パワー'オヨビ'ダイチカラ'ノ イクセイ ケイカ ト ソノ トクセイ

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'L4 Dai-Power' and 'Daichikara' are Capsicum rootstock cultivars with resistance to bacterial wilt and Phytophthora blight that were developed at the NARO Institute of Vegetable and Tea Science. 'L4 Dai-Power' is an F_1 hybrid between 'Dai-Power' (a rootstock cultivar with resistance to bacterial wilt and Phytophthora blight, and with the L^3 gene for resistance to tobamovirus), and AP-5 (an inbred line with resistance to bacterial wilt and Phytophthora blight, and with the L^4 gene for resistance to tobamovirus). AP-5 was selected from a cross between AP-PM03 (an inbred line with the L^4 gene derived from Capsicum chacoense line Pl 260429) and AP-2 (an inbred line with resistance to bacterial wilt and Phytophthora blight), which was derived from a cross between 'Kyonami' (a commercial cultivar with resistant to bacterial wilt ; Takii Seed, Japan) and AC2258 (an inbred line with resistance to Phytophthora blight). 'Daichikara'is an F_1 hybrid between AP-2 and CBP-3 (an inbred line with resistance to bacterial wilt and Phytophthora blight), which was selected from a cross between an L_8 plant derived from a cross between 'Kyonami' and AC2258, and LS2341 (an inbred line with resistance to bacterial wilt). 'L4 Dai-Power' and 'Daichikara' are resistant to bacterial wilt and Phytophthora blight. 'L4 Dai-Power' (with L^4） is additionally resistant to tobamovirus, but 'Daichikara' is not. The yields of scion cultivars on 'L4 Dai-Power' and 'Daichikara' rootstocks were greater than yields on 'Dai-Power', and similar to those on nongrafted scion cultivars. 'L4 Dai-Power' and 'Daichikara' are available as rootstocks to protect Capsicum plants from bacterial wilt and Phytophthora blight. 'L4 Dai-Power' is suitable as a rootstock for Capsicum plants possessing the L^4 gene, and 'Daichikara' is suitable as a rootstock for plants with no resistance to tobamovirus.

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