CONTRIBUTION TO THE SYSTEMATIC RELATIONSHIP BETWEEN CUNNINGHAMIA LANCEOLATA AND CUNNINGHAMIA KONISHII (CUPRESSACEAE) IN VIETNAM BASED ON THE 18S-rDNA SEQUENCE DATA

  • Nguyễn Thị Phương Trang
  • Nguyễn Minh Tâm
  • Phan Kế Long

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

Tác giả

Nguyễn Thị Phương Trang
Nguyễn Minh Tâm
Phan Kế Long
điểm /   đánh giá
Published
2011-11-17