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Gene discovery and pre-emptive breeding of Australian wheat (Triticum Aestivum L.) for broad resistance against insects

Cakir, M., Vitou, J., Haley, S., Phan, H., Edwards, O., Peairs, F., Turanli, F., Ilker, E., Ilbi, H., Malinga, J., Maria, A., Tolmay, V. and Bausshini, M. (2013) Gene discovery and pre-emptive breeding of Australian wheat (Triticum Aestivum L.) for broad resistance against insects. In: Wheat Breeding Assembly 2013, 17 - 19 July, Brisbane, Australia.

Abstract

Australian wheat is at the risk of insects such as Russian wheat aphid (RWA), and Sunn pest that are not yet in Australia. These insects are most damaging pests of cereals. Their incursion to Australia is expected to cause substantial yield loses because current Australian wheat varieties are highly susceptible to these insects.

The objectives: 1) Identify wheat germplasm from around the world that are resistant to Russian wheat aphid and Sunn pest, 2) develop genomic tools for marker - assisted breeding, an d 3) introgress multiple resistance genes into Australian wheat cultivars.

Over 80 lines from various parts of the world were evaluated against RWA biotypes from USA, Mexico, Hungary, France, Chile and Iran. Wheat lines with moderate to good levels of resistance were identified. Resistance genes from various sources were mapped on chromosomes 1DS and 7DS of wheat. Closely linked SSR and DArT markers have been identified. Sunn pest screening work was conducted in Turkey and included lines from ICARDA and l and races from Turkey. Backcross breeding of multiple RWA resistance genes to Wyalkatchem, EGA Gregory and Correll wheat cultivars were completed to BC4 to BC5 stages. The presentation will also outline the strategies for seed distribution to Australian wheat breeders.

Publication Type: Conference Item
Murdoch Affiliation: Western Australian State Agricultural Biotechnology Centre
Conference Website: http://www.wheatbreedingassembly.com.au/docs/wba20...
URI: http://researchrepository.murdoch.edu.au/id/eprint/20006
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