Genetic variation for weed competition and allelopathy in rapeseed (Brassica napus L.).

Harsh Raman, Nawar Shamaya, James Pratley

Research output: Book chapter/Published conference paperChapter (peer-reviewed)

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Rapeseed (canola, Brassica napus L.) is the second major oilseed crop of the world and provides a source of healthy oil for human consumption, meal for stock markets and several other by-products. Several weed species afflict the sustainable production and quality of canola. Various agronomic practices such as crop rotation, stubble management (e.g. burn-ing), minimum tillage, application of herbicides and cultivation of herbicide resistant varie-ties have been deployed to minimise yield losses. There is no doubt that herbicide-tolerant cultivars enable management of weeds which are difficult to control otherwise. However, widespread usage increases the risk of herbicide resistance. This is becoming a major imped-iment in sustaining high crop productivity. Allelopathic and weed competitive varieties are potential tools to reduce the dependence on herbicides and could be grown to suppress weed growth in commercial canola. Genetic variation and ‘proxy’ traits involved in both crop competition as well as allelopathy have been reported. Further research is required to link genetic variation in weed competition and allelopathy, and genetic/genomic marker technol-ogies to unravel effective alleles to expand breeding activity for weed interference in canola.
Original languageEnglish
Title of host publicationBiological approaches for controlling weeds
EditorsRamalingam Radhakrishnan
Place of PublicationLondon, UK
PublisherIntechOpen London
Number of pages22
ISBN (Electronic)9781789236552
ISBN (Print)9781789236545
Publication statusPublished - 05 Nov 2018

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    Raman, H., Shamaya, N., & Pratley, J. (2018). Genetic variation for weed competition and allelopathy in rapeseed (Brassica napus L.). In R. Radhakrishnan (Ed.), Biological approaches for controlling weeds (pp. 27-47). IntechOpen London.