Genetic diversity of alligator weed in China by RAPD analysis

Cheng Yuan Xu; W J Zhang; C Z Fu; B R Lu

doi:10.1023/A:1022453129662

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Genetic diversity of alligator weed in China by RAPD analysis

Journal article

Peer reviewed

Genetic diversity of alligator weed in China by RAPD analysis

Cheng Yuan Xu, W J Zhang, C Z Fu and B R Lu

Biodiversity and Conservation, Vol.12(4), pp.637-645

2003

DOI: https://doi.org/10.1023/A:1022453129662

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Abstract

Ecological Applications

Environmental Science and Management

Ecology

alligator weed

alternanthera philoxeroides

genetic diversity

invasive species

RAPD

vegetative propagation

Random amplified polymorphic DNA (RAPD) was applied to analyze geneticdiversity of an invasive weedy species, alligator weed (Alternantheraphiloxeroides (Martius) Grisebach), collected from eight differentsites in southern China. Amplified by 108 RAPD primers, 391 bands wereidentified from samples collected from three of the eight sites withconsiderably large spatial intervals, but no genetic variation was detectedamong the samples. A total number of 196 RAPD fragments were amplified from allsamples collected in the eight sites by 31 primers that produced the mostconsistent results, but no genetic variation was detected within or betweenpopulations. The molecular data indicated extremely low genetic diversity in thealligator weed. Given the fact that the alligator weed is a serious invasiveweed, and widely found in China, we consider that the low genetic diversity ofthe alligator weed does not affect the success of its expansion in China, andlow genetic diversity does not necessarily lead to endangered status of a plantspecies. In addition, molecular evidence from this study suggests that thealligator weed in southern China might originate from a very few clones or evenonly from a single clone. Therefore, the rapid range expansion of the alligatorweed is most likely the result of a massive vegetative propagation since it wasintroduced in China.

Details

Title: Genetic diversity of alligator weed in China by RAPD analysis
Authors: Cheng Yuan Xu (Author) - Fudan University, China
W J Zhang (Author) - Fudan University, China
C Z Fu (Author) - Fudan University, China
B R Lu (Author) - Fudan University, China
Publication details: Biodiversity and Conservation, Vol.12(4), pp.637-645
Publisher: Springer Netherlands
Date published: 2003
DOI: 10.1023/A:1022453129662
ISSN: 0960-3115
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450304502621
Output Type: Journal article

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