Germplasm enhancement for resistance to Pyrenophra tritici-repentis in wheat

Shankar, Manisha and Mather, Diane and Jorgensen, Dorthe and Golzar, Hossein and Chalmers, Ken and Hollaway, Grant and McLean, Mark and Neate, Stephen and Loughman, Rob (2015) Germplasm enhancement for resistance to Pyrenophra tritici-repentis in wheat. In: 12th International Wheat Genetics Symposium (IWGS 2013), 8-14 Sept 2013, Pacifico Yokohama, Japan.

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Abstract

Yellow spot (syn. tan spot), caused by Pyrenophora tritici-repentis , is an important foliar disease of wheat in Australia that causes losses exceeding 50 % when conditions are favourable for disease development. Although good progress has been made internationally to understand yellow spot resistance, relatively few resistance genes have been identifi ed and mapped in Australian germplasm and only one (tsn1 on chromosome 5BL) is in general and known use in Australian breeding programs. Although tsn1 is an important yellow spot resistance gene, it doesn’t explain the full spectrum of resistance and there is a significant opportunity to enhance expression of yellow spot resistance through identification of resistance factors other than tsn1 . Six doubled haploid (DH) mapping populations (five of which were fixed for tsn1) were screened for yellow spot resistance at the seedling/tillering and adult plant stages at the Department of Agriculture and Food, Western Australia (DAFWA) and the Department of Environment and Primary Industries Victoria (DEPIVic) from 2009 to 2012. Four of the above populations were screened at the Department of Agriculture, Fisheries and Forestry Queensland (DAFFQ). Frequency distribution of individuals within each population for various levels of yellow spot resistance was continuous indicating that resistance is conditioned by several genes with partial effects. A few lines within each population consistently showed high levels of resistance probably resulting from a combination of several genes with additive effects. Nine new loci for yellow spot resistance were mapped.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to Published Version in accordance with the copyright policy of the publisher. Open Access.
Faculty / Department / School: Current - Institute for Agriculture and the Environment
Date Deposited: 28 Jun 2016 04:15
Last Modified: 30 Jun 2017 05:30
Uncontrolled Keywords: phenotyping; quantitative trait loci; resistance; tan spot; yellow leaf spot
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Socio-Economic Objective: D Environment > 96 Environment > 9604 Control of Pests, Diseases and Exotic Species > 960413 Control of Plant Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments
Identification Number or DOI: 10.1007/978-4-431-55675-6_21
URI: http://eprints.usq.edu.au/id/eprint/28540

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