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㸨㐃⤡㈐௵⪅㸦᳃ᯘᯘᴗ㒊㸸[email protected]㸧 2018 ᖺ 8 ᭶ 1 ᪥㸹⌮ 2018 ᖺ 11 ᭶ 19 ᪥ ࢶᮦ ⥺ ᢠ ᛶ ࢡ ࢶ ࠕ ࢶ㯮 ࡢ ࡉ ࡋᮌ ⱑ ᚓ ⱑ ⋡ ࡢ ᐑཎᙪ 㸨 ᴍ㷂ᗣ ⏘Ꮫᐁඹ㛤Ⓨࡓࡋ㸪ࢶᮦ⥺ࡁᙉࢡ࠸ࠕࢶࢶ㯮ࡋࡉᮌࢡቑṪࡍ㝿 ࡢ㸪ᚓⱑ⋡㧗ࡓࡢヨ㦂ᐇࡢ✑ࡋࡉࠋࡓࡋኴࡉ PP PP ቃ ༊ศࡋኴࡉ㸪ࡋࡉᮌᮇ㸪 ࡋࡉᗋຍ ࡢ᭷↓ࡢⓎ᰿⋡ㄪᰝࡓࡋࡇ㸪ኴ ࡀࡉPP ᮍ‶✑ࡋࡉࡢࡋࡉᮌࡢ㐺ᮇ࠶ 㹼 ᭶ࡋࡉᮌࡋ㸪㟁⇕ ᗋࡋࡉᗋ Υຍ ࡍࡇ㸪Ⓨ᰿⋡ ࡀ ᭶ᮇ 㸣㸪 ᭶ᮇ 㸣 ࠋࡓࡋⓎ᰿ಶయ ᭶ᗋࡋ࠼㸪 ࡢࡑᚋ ᖺ ᭶⫱ⱑ ࡓࡋ ᖺ⏕ⱑࡢつ᱁ⱑᚓⱑ⋡ࡣ㸪PP௨✑ࡋࡉࡢࡋࡉᮌࡓࡋ᪉ࡀ㧗 ࠋࡓࡗ௨⤖ࡢᯝ㸪 ࢶ㯮ࡋࡉࡢᮌ ࡣPP ௨ PP ᮍ‶✑ࡋࡉࡢ㐺ᮇࡋࡉᗋຍ ࡋࡋࡉᮌࡍࡇ ᖺ⏕ⱑࡢᚓⱑ⋡ ࡀࡍࡇࡀࠋࡓࡗ࡞ ᖺ⏕ⱑࡢ㍈ࡢ᭤ࡀ㜵ࡓࡄࡣ㸪ࡁࡅࡔⱆࡀ✑ࡋࡉ࡞ࡄࡍࡗ⏝ ࡍࡇࡀᮃࡀ࠸ࡋ㸪ⱑࡢ㍈ࡢ᭤ࡀࡣࢶ㯮ࡋࡉᮌⱑࡢ⏝ၥ㢟࡞ࡇ࠸࡞☜ㄆ ࠋࡓࡋᮏ◊✲ ࡇィ ᅇᐇࡉࡓヨ㦂⤖ࡢᯝồࡓࢶ㯮 ࢡࡢᖹᆒⓎ᰿⋡ ࡣ㸣 ࠋࡓࡗ࠶ࢶ㯮 ࢡࡕ࠺ࡢ㸪ぶ⣔⤫ࡀ₃ࡃ࡞࠸ࡇⓎ᰿⋡ࡀ㧗ࡇ࠸᮲௳㸪Ⓨ᰿⋡ ࡢ ࢡ⤠㎸ࡇᖹᆒⓎ᰿⋡ ࡣ㸣㸣 ࠋࡓࡋ>ࢻ㸸Ⓨ᰿⋡㸪ࢡࢶ㸪ࡋࡉᮌ㸪ᚓⱑ⋡@ Improvement of Seedling Yield Rate by Cuttings of Pine Wilt Disease Resistant Japanese Black Pine as "Hyper Black Pine". MIYAHARA Fumihiko and Koji NARAZAKI (Fukuoka Agriculture and Forestry Research Center, Chikushino, Fukuoka 818-8549, Japan) Bull. Fukuoka Agric. For. Res. Cent. 5:53-61 (2019) An experiment was conducted to increase the seedling yield rate of Japanese black pine, using cuttings of 73 clones that were highly resistant to pine wilt disease ("hyper black pines"). The cutting rooting rate was investigated by dividing the cutting diameter into three categories, with 4 mm and 6 mm as the lower and upper limit, respectively. Electrothermal sheets were used to heat the cutting bed heating to 25 °C. The rooting rate of the cuttings improved by 42% in December and 23% in February when the cutting diameter was below 6 mm in the relevant period (December to February). Rooted cuttings were individually transplanted into polyvinyl pots and cultivated for one year and eight months. Two-year-old seedlings were then selected by size; the yield rate of seedlings with a cutting diameter of ≥ 4 mm was higher than seedlings with a < 4 mm cutting diameter. A cutting diameter of ≥ 4 mm and < 6 mm was ther efore considered suitable. Based on tests conducted six times in total (including the study described in this paper), the average rooting rate of the 73 hyper black pine clones was 52.8%. The average rooting rate improved from 52.8% to 64.5% when the analysis was based on the 44 clones with the highest rooting rate, and the inclusion of parent lines composed of each of the original 73 clones without omission. [Keywords: cuttings, Japanese black pine, rooting rate, seedling yield rate] ⥴ ゝ ᅜࡢᯇᯘᘏࡋ࠸ᐖᆺࡢࢶᯤ⿕ᐖࡣ㸪 ࢶࢲࡗ㐠ࡤᯇࡃࡘ ࢶࢨࢭࢳ㸦௨ୗ㸪⥺㸧 ࡀཎᅉࡋ▱ ࠸㸦ᓊ 㸪㸧 ࡢࡇࠋᐖᆺࢶᯤ⿕ᐖ㸦௨ ୗ㸪ࢶᮦ⥺㸧ᑐࡋ㸪す᪥ᮏࡢᯘᮌ⫱✀ሙ㸦ᙜ㸧 ┴✲◊ࡢᶵ㛵ࡀඹࢶᮦ⥺ᙉ࠸ᢠᛶ ࢡ ࢶ ࢡ㑅ᢤࡋ㸦⸨ᮏ㸧㸪ࡑ ࡘࡢࡂᮌⱑ᥇✀ᅬࡀᆅ㐀ᡂࡉࡢࡇࠋࡓ᥇✀ᅬ ࡣᢠᛶࢡ ࢶ ࢡኈ↛⮬ࡢ㓄✀Ꮚࡀ᥇ ࡉᐇ⏕ⱑࡉ⏘⏕ࡀ࠸ࡢࡇࠋᐇ⏕ⱑࡣᢠᛶᣢ ࡗ࠸࡞࠸ᚑ᮶ࢡࡢࢶࡣᢠᛶࡀ㧗࠸ ࡢࡢ㸦ᡞ⏣ 㸧㸪㓄ࡗぶᢠᛶࡀప࠸ⱑ ࡀࡁ⬟ᛶ࠶ࡀࡇ⮬↛㓄ࡓࡢᅬእࡢⰼ ⢊ởᰁⱑࡢᢠᛶࡀపୗࡍ༴㝤ᛶᣢࡗ࠸ࡇ 㸪⚟ᒸ┴ᯘᴗ✀ⱑ⏕⏘ࡋ࠸⚟ᒸ┴ᶞⱑ㎰ᴗ ༠⤌㸦௨ୗ㸪⚟ᒸ┴ⱑ⤌㸧ࡣ᥇✀ᅬ⏘ࡢⱑ⥺ ᙉไ᥋✀ࡋ㸪⏕ࡁṧࡓࡗⱑ㸦௨ୗ㸪᥋✀ᐃⱑ㸧 ࡔࡅฟⲴࡍࡇⱑࡢᢠᛶ⥔ᣢࡋ࠸㸦ᐑཎ 㸧 ࠋࡋࡋ㸪ձࡢࡇᙉไ᥋✀సᴗࡣẖᖺ ᭶ୗ᪪┿ࡢኟ ⱑ⏿⫱ᡂࡋ࠸ࢡࢶⱑ ᮏ ᮏᐃ㔞⥺ࡢ ᥋✀ࡅ࡞ࡋ࡞ࡤࡓ࠸࡞㸪సᴗ⪅ࡗࡣ ࡞ࡢປാ㈇ᢸࡗ࡞࠸ࡇ㸪ղࡢࡇ᥋✀⣙ ࡢⱑࡀ㒊ศᯤᯤṚࡋᗫᲠࡉࡓ㸪᥋✀ᐃ ⱑࡢṌ␃ࡀపࡇ࠸㸪ճᙉไ᥋✀⏝ࡋ࠸⥺ ࡉᙉ࠸⣔⤫⏺↛⮬ࡀᏑᅾࡋ࠸ࡇ 㸪 ᖺᅜ❧ᏛἲேᕞᏛ㸪⊂❧⾜ᨻἲே᳃ᯘ ⥲◊✲ᡤᯘᮌ⫱✀ࢭࢱᕞ⫱✀ሙ㸦ᙜ㸧㸪⊂❧⾜ ᨻἲே᳃ᯘ⥲◊✲ᡤ㛵すᨭᡤ㸦ᙜ㸧㸪ᕞ┴ᯘᴗヨ㦂◊✲ᶵ㛵㸪ኳⲡᆅᇦ᳃ᯘ⤌ࡢඹ㸪ࢶᮦ⥺ ࡉᙉࢡ࠸ࡢࢶ㛤ⓎࡋࡉᮌࢡቑṪ ᢏ⾡ࡢ㛤Ⓨⱑᮌẁ㝵ࡢᙉไ᥋✀せࡍ ࢩマツ材線虫病抵抗性クロマツ「ハイパーマツ黒」のさし木苗得苗率の向上 53

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