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《植物学报(英文版)》 2003-05
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Phylogenetic Relationship of an Extremely Endangered Species, Pinus squamata (Pinaceae) Inferred from Four Sequences of the Chloroplast Genome and ITS of the Nuclear Ribosomal DNA

ZHANG Zhi_Yong 1,2 , YANG Jun_Bo 1, LI De_Zhu 1  (1. Laboratory of Plant Biodiversity and Biogeography, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming 650204, China; 2. Agriculture College, Jiangxi Agriculture University, Nanchang 330045, China)  
Pinus squamata X. W. Li, a recently_described species of the Pinaceae, is an extremely endangered pine with only 32 individuals in the wild. This species was thought to be intermediate between P. bungeana Zucc. ex Endl. of subgen. Strobus and P. yunnanensis Franch. of subgen. Pinus by the original author. We made an effort to address the question of the phylogenetic relationship of this peculiar and important species in the context of the major groups of the genus Pinus by using sequences of the rbc L, mat K genes, rpl20_rps18 spacer, trn V intron of the chloroplast genome and the nuclear ribosomal ITS region. The results of the separated analysis and the combined analysis of the four cpDNA sequences and ITS sequence indicated that P. squamata was a stable member of subsect. Gerardianae and P. gerardiana Wall. was the closest species of P. squamata phylogenetically. As a result, the causes of the distribution pattern of subsect. Gerardianae were also discussed.
【Fund】: 中国科学院知识创新工程重要方向项目 (KSCX2_1_10 6B)。~~
【CateGory Index】: Q949
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