MOLECULAR, MORPHOLOGICAL, AND EXPERIMENTAL EVIDENCE FOR HYBRIDIZATION BETWEEN THREATENED SPECIES OF THE GALAPAGOS ENDEMIC GENUS SCALESIA (ASTERACEAE)

被引：7
|
作者：
Lindhardt, M. S. [1 ,2 ]
Philipp, M. [1 ]
Tye, A. [2 ]
Nielsen, L. R. [1 ]
机构：
[1] Univ Copenhagen, Inst Biol, Dept Populat Biol, DK-2100 Copenhagen O, Denmark
[2] Charles Darwin Res Stn, Santa Cruz, Galapagos, Ecuador
来源：
INTERNATIONAL JOURNAL OF PLANT SCIENCES | 2009年 / 170卷 / 08期
关键词：
hybridization; endemic species; amplified fragment length polymorphism (AFLP); morphology; Galapagos; Scalesia; SILVERSWORD ALLIANCE COMPOSITAE; HOMOPLOID HYBRID SPECIATION; ADAPTIVE RADIATION; GENOTYPING ERRORS; HAWAIIAN-ISLANDS; AFLP; DIFFERENTIATION; POPULATIONS; EVOLUTION; GENETICS;
D O I：
10.1086/605113
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
The Galapagos endemic plants Scalesia aspera, Scalesia crockeri, and Scalesia pedunculata (Asteraceae) grow in distinct parts of Santa Cruz Island. Between them lie morphologically intermediate populations. The putative hybridization of the three species was investigated by means of morphological (leaf characters) and molecular (amplified fragment length polymorphism) measures. The results suggest that the intermediate populations are interspecific hybrids. Artificial hybrids were also made by crossing S. crockeri and S. pedunculata manually. We thus document that reproductive barriers are incomplete and that gene flow occurs between the three different species of Scalesia.
引用
收藏
页码：1019 / 1030
页数：12
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