Weather Resistance Breeding Project

Japanese: 気象害抵抗性育種事業 - きしょうがいていこうせいいくしゅじぎょう
Weather Resistance Breeding Project

...These scion and seed orchards supply cuttings and seeds for afforestation, but because Japan's elite trees are selected for their phenotypes, next generation test forests are also created to confirm whether their superiority is genetic, and the results are used to improve the scion and seed orchards. The weather damage resistance breeding project selects trees that are highly resistant to snow damage, frost damage, and cold wind damage, and uses these to create genetically superior trees. In the case of snow damage resistance, trees with minimal damage are selected from areas with severe damage, poor environments, and damaged areas of forests where varieties and strains thought to be resistant were test planted in heavy snowfall areas (average maximum snow depth of 250 cm or more), heavy snowfall areas (average maximum snow depth of 120 to 250 cm), and other areas.

*Some of the terms used in the "Weather Resistance Breeding Project" are explained below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…これらの採穂園や採種園で,造林用の挿穂,種を供給するが,日本の精英樹は表現型で選ばれたものであるから,その優良性が遺伝的なものかどうかを確認するための次代検定林もつくり,その成績によって採穂園,採種園を改良する。気象害抵抗性育種事業は,雪害,凍害あるいは寒風害に対する抵抗性の強いものを選びだし,それらをもとにして遺伝的に優れたものをつくろうとするものである。雪害抵抗性の場合には,豪雪地域(平均最高積雪深250cm以上),多雪地域(同120~250cm),その他の地域ごとに,激害地,不良環境地,抵抗性が強いと思われた品種・系統を試植した林の被害地で,被害の少ないものを選ぶ。…

※「気象害抵抗性育種事業」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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