林木育種における地上LiDAR 計測の応用:―スギ精英樹F<sub>1</sub> 家系における樹幹形質の評価―  [in Japanese] Application of Terrestrial LiDAR for Forest Tree Breeding::Evaluation of Stem Traits on F<sub>1</sub> Progenies of <i>Cryptomeria japonica</i> Plus Trees  [in Japanese]

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Abstract

林木育種における表現型計測への地上LiDAR の実用的利用を目的とし, スギ精英樹F<sub>1</sub> 個体を植栽した試験地の3次元レーザ計測より得られた点群データを基に, 樹幹の諸形質の定量化および評価を行った。樹幹の点群データについて, 10cm 高ごとに水平な真円 (幹リング) で近似した。点群データと幹リングに基づき, 樹高および胸高直径の高精度な自動推定が可能であった。幹リングを利用して3次式の相対幹曲線をあてはめた。相対幹曲線から推定した幹材積は, 樹高と胸高直径から推定される値と高い相関関係にあった。幹の通直性を二つの標準化手法を用いて定量化し, 現地調査で得た通直性の指数との比較により評価した。推定された形質値間の相関係数により, 形質間の関係性を検討した。それぞれの形質における相加的遺伝分散の割合は, 矢高において大きく, 樹高, 材積, DBH および相対幹曲線の係数の順に低下した。林木育種の表現型計測における本解析手法の有効性について議論した。

In order to apply terrestrial LiDAR for phenotyping in forest tree breeding, various traits of stem were quantified and evaluated based on a point cloud obtained by ground-based three-dimensional laser measurements on a study site of F<sub>1</sub> individuals of <i>Cryptomeria japonica</i> plus trees. The point cloud of each individual stem was approximated by "stem circles", which are horizontal perfect circles arrayed per 10 cm height. Based on the point cloud and the stem circles, both height and diameter at breast height (DBH) of individuals were automatically estimated with high accuracy. The relative stem taper curve equation of the third order was approximated for each individual based on the stem circles. Stem volume of each individual estimated from the taper curve showed high correlation with one estimated from only tree height and DBH. Stem straightness was quantified in the two standardized methods and these methods were evaluated with stem straightness index investigated on the field. The relationships among these estimated traits were examiend using correlation coefficients. Of the ratio of additive genetic variance, the highest was stem straightness, followed in order by tree height, stem volume, DBH, and the coefficients of the relative stem taper curve. The usefulness of the analytical method for phenotyping in forest tree breeding was discussed.

Journal

  • Journal of the Japanese Forest Society

    Journal of the Japanese Forest Society 97(6), 290-295, 2015

    THE JAPANESE FORESTRY SOCIETY

Codes

  • NII Article ID (NAID)
    130005125222
  • NII NACSIS-CAT ID (NCID)
    AA12003078
  • Text Lang
    JPN
  • Article Type
    journal article
  • ISSN
    1349-8509
  • NDL Article ID
    027046350
  • NDL Call No.
    Z18-340
  • Data Source
    NDL  J-STAGE  JASI 
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