CONTRIBUTION TO THE SYSTEMATIC RELATIONSHIP BETWEEN CUNNINGHAMIA LANCEOLATA AND CUNNINGHAMIA KONISHII (CUPRESSACEAE) IN VIETNAM BASED ON THE 18S-rDNA SEQUENCE DATA
Abstract
The systematic relationship between Cunninghamia lanceolata (Lamb.) Hook, and Cunninghamia konishii Hayata in Vietaam was investigated by using the 18S-rDNA sequence data. DNA was exttacted from young leaves of inttoduced and cultivated Cunninghamia lanceolata and of native Cunninghamia konshiii. The nucleotide sequence of 18S-rDNA was determined with 703 bp and used to analysis of phylogeny of Cunninghamia lanceolata by MP method, together with another species of the same genus, Cunninghamia konishii Hayata, and 7 species of another genera of the same family Cupressaceae, namely Taiwania cryptomerioides, Chamaecyparis obtusa var. formosana, Cryptomeria japonica, Calocedrus decurrens, Cupressus macrocarpa. Sequoia sempervirens, and Metasequoia glyptostroboides. The cladiogram has indicated that Cunninghamia lanceolata and Cunninghamia konishii were found a cluster with bootsttap 99% and the very low level ofthe sequence divergence in 18S-rDNA, 0.018. We suggest an identity hypothesis between these two species, and recognize Cunninghamia konishii Hayata as a variety of Cuninghamia lanceolata (Lamb.) Hook., var. konishii (Hayata) Fujita, beside the typical var., var. lanceolat
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Published
2011-11-17
Section
Articles