リンゴ樹の生育に及ぼすＡＣＬＳＶフリーＭ．９台木の影響

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書誌事項

タイトル別名
  • Effect of an Apple-Chlorotic-Leaf-Spot-Virus Free M.9 Rootstock on the Growth of Apple Trees.
  • リンゴジュ ノ セイイク ニ オヨボス ACLSV フリーM.9 ダイギ ノ

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Marubakaido (Mains prunifolia Bork, var. ringo Asami) has been used as the main understock with dwarfing interstems, such as M. 9 and M. 26, for apple trees in Japan because it can easily be propagated by hardwood cuttings. The use of M. 9 as an interstem with Marubakaido resulted in severe growth retardation or death of trees because the M. 9 introduced into our area was infected with the apple-chlorotic-leaf-spot virus (ACLSV) to which Marubakaido is highly susceptible. Furthermore, when M. 9 was used as a rootstock, a similar reduction in tree growth occurred.<BR>ACLSV-free clone, M. 9- (minus), was developed from heat-treated shoot tips of M. 9 rootstock. The influence of this clone as a rootstock for 9 seasons and as an interstem for 4 years on the growth and yield of apple trees was evaluated in comparison with ACLSV-free M. 26 rootstock.<BR>1. 'Fuji'/M. 9- scion/stock combination was smaller than 'Fuji'/M. 26 after 9 growing seasons. A severe growth reduction observed on 'Fuji'/M. 9 combination in the previous experiment was not observed in this study. Cumulative yield per trunk cross-sectional area was higher in M. 9- than it was in M. 26. It was not clear whether ACLSV or other latent viruses were responsible for the severe growth reducition. We determined that M. 9- is a promising rootstock for controlling the size of apple trees if the trees are planted at distances of 1.5×4 to 2×4.5 m.<BR>2. When Marubakaido-N1, a weeping subclone selected from Nagano Prefecture, was used as the understock for 'Sekaiichi', 'Tsugaru' and 'Fuji' with M. 26 and M. 9- as the interstems, the 4-year-old trees with M. 26 grew less vigorously and produced smaller fruit than did the same combinations with M. 9- interstem. The incidence of burrknots and trunk flattening was more severe on M. 26 interstems; these 2 conditions may be related to the greater growth retardation on this rootstock. We consider M. 9- to be more promising than M. 26 as an interstem for controlling the size of apple trees.

収録刊行物

  • 園芸学会雑誌

    園芸学会雑誌 62 (3), 499-504, 1993

    一般社団法人　園芸学会

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