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基于ITS序列和trnL-F序列探讨小叶锦鸡儿-JournalofSystematics
植 物 分 类 学 报 44 (2): 126–134 (2006) doi:10.1360/aps040077
Acta Phytotaxonomica Sinica
基于ITS序列和trnL-F序列探讨小叶锦鸡儿、
中间锦鸡儿和柠条锦鸡儿的种间关系
*
侯 鑫 刘俊娥 赵一之 赵利清
( 内蒙古大学生命科学学院 呼和浩特 010021)
Interspecific relationships of Caragana microphylla,
C. davazamcii and C. korshinskii (Leguminosae)
based on ITS and trnL-F data sets
HOU Xin LIU Jun-E ZHAO Yi-Zhi* ZHAO Li-Qing
(College of Life Sciences, Inner Mongolia University, Huhhot 010021, China )
Abstract The taxonomic treatment of Caragana davazamcii Sancz. has been a controversial
matter, as its relationship with C. microphylla Lam. and C. korshinskii Kom. is not clear. It
was treated as an independent species, or a variety under C. microphylla or C. korshinskii.
This study is to examine the interspecific relationship of these three species and the origin of
C. davazamcii based on internal transcribed spacer (ITS) and non-coding region of chloroplast
trnL-F, combined with morphological data and geographical distribution. The trnL-F
sequence of C. davazamcii is identical to that of C. microphylla but differs distinctly from that
of C. korshinskii. The high congruence of ITS copies through both direct and cloning
sequencing rejects the recent hybridization hypothesis of C. davazamcii between C.
microphylla and C. korshinskii. In contrast, two different ITS sequence copies were found
respectively in each individual of C. microphylla and C. korshinskii. One of the two ITS
sequences in C. microphylla is identical to that of C. davazamcii. This result indicates that C.
davazamcii might have taken p
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