Pre-breeding wheat for resistance to root-lesion nematodes

Thompson, John and Sheedy, Jason and Robinson, Neil and Reen, Ros and Clewett, Tim and Lin, Jing (2012) Pre-breeding wheat for resistance to root-lesion nematodes. In: 2012 GRDC Grains Research Update, Goondiwindi, 12 April 2012, Goondiwindi, Australia.

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Abstract

Wheat (Triticum aestivum) is a favoured host of the root-lesion nematodes Pratylenchus thornei and P. neglectus. These nematodes invade wheat roots where they feed and reproduce. Their activities cause lesions and decrease the efficiency of roots, resulting in poor uptake of nutrients and water from the soil leading to reduced plant biomass and grain yield. Both nematode species occur in all Australian wheat regions, however, in the northern region P. thornei is more widespread and occurs at higher population densities than P. neglectus. For example, P. thornei was found in 67% and P. neglectus in 32% of 795 fields tested (Thompson et al 2010). P. thornei and P. neglectus were present at population densities exceeding 2000/kg soil (considered a threshold for damage) in respectively 31% and 5% of samples. The loss to the wheat industry from these two nematode species has been estimated at $AU47 million/year for the northern region and $123 million for all Australia, based on average wheat production and price of $AUD239/tonne over a 10-year period to 2008 (Murray and Brennan 2010). Potential losses, if there were no management options with crop rotation and tolerant varieties, were estimated to be $125 million in the northern region and $433 million/year in all of Australia.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: Paper not held but url connects to full article.
Faculty / Department / School: Current - USQ Other
Date Deposited: 21 Jan 2015 02:11
Last Modified: 15 Sep 2017 04:01
Uncontrolled Keywords: root-lesion nemotodes; pathogens; wheat; Pratylenchus thornei; Pratylenchus neglectus
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070302 Agronomy
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
URI: http://eprints.usq.edu.au/id/eprint/26600

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