Allelopathy, DIMBOA production and genetic variability in accessions of Triticum speltoides

Quader, Motiul and Daggard, Grant and Barrow, Russell A. and Walker, Steven and Sutherland, Mark W. (2001) Allelopathy, DIMBOA production and genetic variability in accessions of Triticum speltoides. Journal of Chemical Ecology, 27 (4). pp. 747-760. ISSN 1573-1561


A screening was conducted to study the allelopathic potential of Australian-held accessions of Triticum speltoides. Of 26 accessions, four were found to inhibit root growth in the indicator species, lettuce (Lactuca sativa). The methanol leaf extracts of these accessions significantly reduced the root length of wild oat (Avena spp.). In all but one case, alellopathic accessions contained higher amounts of DIMBOA than did nonallelopathic accessions. Since some variation in allelopathic response was detected within lines, random amplified polymorphic DNA (RAPD) markers were used to estimate genetic diversity between and within the allelopathic accessions of Triticum speltoides L. The average genetic similarity between all possible pairs of selected accessions was found to be 55% and ranged from 44% to 88%. Comparison of DNA extracted from different single seedlings within the same accession revealed significant intraaccession genetic diversity (4–24%), although this was much less than that observed between accessions tested. This intraaccession diversity has significant implications for the selection of T. speltoides accessions in breeding or screening programs.

Statistics for USQ ePrint 3152
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Awaiting Author's version from Author. Deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 17 Jul 2008 23:39
Last Modified: 02 Jul 2013 22:49
Uncontrolled Keywords: allelopathy, wheat, RAPD, genetic diversity, weed, wild oats, lettuce
Fields of Research : 06 Biological Sciences > 0604 Genetics > 060412 Quantitative Genetics (incl. Disease and Trait Mapping Genetics)
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070305 Crop and Pasture Improvement (Selection and Breeding)
Identification Number or DOI: 10.1023/A:1010354019573

Actions (login required)

View Item Archive Repository Staff Only