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An investigation of genetic variation in Carthamus lanatus in New South Wales, Australia, using intersimple sequence repeats (ISSR) analysis by G J Ash; R Raman; N S Crump is a Agricultural and Biological Sciences article available to read on EtoBox.

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**Summary** __Carthamus lanatus__ is a widespread and troublesome weed of crops and pastures in Australia. It is viewed as a target for both inundative and classical biological control. As fungal biological control agents are often specific in terms of their host range, the genetic variation within the host may be important in their successful deployment. The detection of genetic variation in populations of __C. lanatus__ from New South Wales was studied using polymerase chain reaction (PCR)‐based, intersimple sequence repeats (ISSR) analysis. DNA extracted from plant samples from 11 locations in New South Wales was compared with one sample from Western Australia and one accession of the closely related crop plant, safflower. The analysis indicated that there were two distinct groups of __C. lanatus__ that correlated with location (northern and southern regions). Within‐group genetic diversity, as determined by the Shannon genetic diversity index, was low at 0.33 in the southern group and 0.22 in the northern group. The presence of these groups may have implications for the biological control of __C. lanatus__ using exotic fungi. In any screening of candidate agents, representative

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Author

G J Ash; R Raman; N S Crump

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0043-1737)

Published

2003

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)