DNA-based Identification of <i>Cedrus</i> (<i>Pinaceae</i>) Planted in Japan

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  • 日本国内に植栽されるヒマラヤスギ属植物（マツ科）のDNA 同定
  • DNA-based Identification of Cedrus (Pinaceae) Planted in Japan

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Abstract

<p>True cedars, the genus Cedrus, are important ornamental trees in the world. In Japan, Himalayan cedar [C. deodara (Roxb. ex D.Don) G.Don] with long needles was introduced in the early Meiji era and has been widely planted, but Atlas cedar [C. atlantica (Endl.) G.Manetti ex Carrière] and Lebanon cedar (C. libani A.Rich) have rarely been planted. The identification of C. atlantica and C. libani planted in Japan is often confused because both species have shorter needles. It is reported that interspecific hybrids between C. atlantica and C. libani occur in plantation forests. This study attempted to identify trees planted as C. atlantica and C. libani in Japan based on nucleotide sequences of paternally inherited chloroplast DNA and maternally inherited mitochondria DNA with reference to a previous molecular study. As a result, eight chloroplast types and three mitochondrial types were detected from 57 trees in Japan and 11 genotypes based on their combination were distinguished. Eight genotypes were identified as C. deodara, C. atlantica or C. libani but the others as hybrids, C. libani (♀) × C. atlantica (♂), C. atlantica (♀) × C. libani (♂), or C. deodara (♀) × C. libani (♂). The last one is considered to be C. ×intermedia Sénécl.</p>

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