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Genetic Diversity and Origin of Siam Weed (Chromolaena odorata) in Australia

Published online by Cambridge University Press:  12 June 2017

Leon J. Scott ,
Corinna L. Lange ,
Glenn C. Graham  and
David K. Yeates
Leon J. Scott
Affiliation:
Cooperative Research Center for Tropical Pest Management, University of Queensland, Brisbane, 4072, Australia
Corinna L. Lange
Affiliation:
Cooperative Research Center for Tropical Pest Management, University of Queensland, Brisbane, 4072, Australia
Glenn C. Graham
Affiliation:
Cooperative Research Center for Tropical Pest Management, University of Queensland, Brisbane, 4072, Australia
David K. Yeates
Affiliation:
University of Queensland, Brisbane, 4072, Australia
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Abstract

Asynchronous flowering was noted in a recently discovered infestation of siam weed in north Queensland. This may indicate some genetic diversity in the infestation, increasing concerns about the origin of the infestation. Internal transcribed spacer 1 (ITS1) sequence data were obtained for siam weed individuals from north Queensland, Indonesia, Thailand, South Africa, Ivory Coast, Brazil, Colombia, and the U.S. The ITS1 region is 258 base pairs long, and the populations that flower at different times in north Queensland differ by four base substitutions. The genotype common in north Queensland is also reported throughout the native and introduced ranges. The other genotype is reported only in north Queensland and southern Brazil. These data, in conjunction with prior investigations into possible origins, indicate that Brazil is the most likely source of the infestation in Australia.

Keywords

Siam weed, Chromolaena odorata (L.) King &Robinson. # EUPODGeneticsweed controlinvasionbiotypeDNA sequenceITS1EUPODITS1, internal transcribed spacer 1CTAB, hexadecyltrimethyl-ammonium bromideDNA, deoxyribonucleic acidEDTA, ethylene-diaminetetraacetic acidTris-HCl, tris[hydroxymethyl]aminomethanePVP40, polyvinyl pyrrolidone mol. wt. 40,000Mes, 2-[N-morpholino]ethanesulfonic acidPCR, polymerase chain reactiondNTP, deoxy-nucleotide triphosphateU/μl, units per microliterTAE, Tris-Acetate EDTA
Type
Research
Information
Weed Technology , Volume 12 , Issue 1 , March 1998 , pp. 27 - 31
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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