さし穂サイズと採穂台木の形態的要因がクロマツさし木苗の生産効率に与える影響  [in Japanese] Effect of the Cutting Size and Morphological Factors and Pruned Branches on Improving the Productivity of Rooted Cuttings in Pinus thunbergii Hedges  [in Japanese]

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Author(s)

    • 松永 孝治 MATSUNAGA Koji
    • 独立行政法人森林総合研究所林木育種センター九州育種場 Kyushu Regional Breeding Office, Forest Tree Breeding Center, Forestry and Forest Products Research Institute
    • 大平 峰子 OHIRA Mineko
    • 独立行政法人森林総合研究所林木育種センター九州育種場 Kyushu Regional Breeding Office, Forest Tree Breeding Center, Forestry and Forest Products Research Institute
    • 倉本 哲嗣 KURAMOTO Noritsugu
    • 独立行政法人森林総合研究所林木育種センター九州育種場 Kyushu Regional Breeding Office, Forest Tree Breeding Center, Forestry and Forest Products Research Institute

Abstract

効率的なクロマツさし木苗の生産方法を確立するため, 二つの実験を行った。まずさし木発根性に及ぼす穂のサイズの影響を調べるため, 5家系の5∼6年生クロマツ採穂台木各1個体から穂を採取してさし付けた。その結果, 穂が長いほど, また穂の直径が太いほど発根性が低下する傾向があった。次に, 採穂台木の剪定後に得られる萌芽枝数とそのサイズに影響する要因を明らかにするために, 5家系各3個体の4年生クロマツ採穂台木について, 剪定した枝とそこから発生した萌芽枝数とサイズの関係を調べた。その結果, 剪定枝あたりの萌芽枝数は剪定枝上で萌芽枝が発生している部位 (萌芽帯) の長さと剪定枝の直径, 萌芽枝のサイズは剪定枝の直径に強く影響された。また分散分析の結果, 萌芽枝数, 剪定枝の直径および萌芽帯の長さは家系間に有意差があった。これらの結果は家系の選抜により萌芽枝数の改良が可能であることを示唆した。

We investigated the morphological and genetic factors affecting the rooting ability of cuttings and the shoot production of hedges of <I>Pinus thunbergii</I> by performing two different experiments. The effect of cutting size on rooting ability was investigated by using shoot cuttings obtained from five hedges (5∼6 years old). The shorter and thinner cuttings tended to show better rooting ability, and the rooting ability was different among individual hedges. In order to clarify the factors affecting the numbers and the sizes of the shoots obtained from the hedges, we measured several morphological traits of the shoots and the pruned branches in three 4-year-old hedges for each of the five half-sib families. A stepwise regression analysis suggested that the number of shoots per pruned branch was affected by the length of sprouting zone and the diameter of the pruned branch. The sizes of the shoots were most affected by the diameter of the pruned branch. Nested ANOVA showed that the number of shoots per pruned branch, the diameter of the pruned branch, and the length of the sprouting zone significantly varied among the families. These results suggested that family selection can improve the numbers of shoots in <I>P. thunbergii </I>hedges.

Journal

  • Journal of the Japanese Forest Society

    Journal of the Japanese Forest Society 91(5), 335-343, 2009-10-01

    Japanese Forestry Society

References:  44

Codes

  • NII Article ID (NAID)
    110007466442
  • NII NACSIS-CAT ID (NCID)
    AA12003078
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    13498509
  • NDL Article ID
    10479570
  • NDL Source Classification
    ZR21(科学技術--農林水産--林産)
  • NDL Call No.
    Z18-340
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE  JASI 
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