Abstract Detail

Genetics Section

Zhang, Bo [1], Chi, Dawn [2], Hiebert, Colin [3], Fetch, Tom [4], Xue, Allen [5], Cao, Wenguang [6], Fedak, George [6].

Pyramiding genes for resistance to stem rust, leaf rust and Fusarium head blight.

A screening of spring wheat gemplasm in Eastern Canada revealed no resistance to the Ug99 races of stem rust. Leaf rust is a recurring problem in eastern Canada, but is not currently being addressed. Fusarium head blight (FHB) is a recurring problem in all classes of wheat. It is a well- known fact that a single gene for resistance to a disease may not have an effectual life span as three genes. This project involved the pyramiding of several stem rust resistance genes with the leaf rust resistance gene Lr34 and FHB resistance gene Fhb1. A total of 68 doubled haploid lines were produced from the hybrid: AC Cadillac (SrCad/Sr42, Lr34) / Carberry (Lr34, Fhb1) // RL5405 (Sr33) / Carberry (Lr34, Fhb1). Sixteen different combinations of the disease resistance genes Lr34, Sr33, SrCad/Sr42, and Fhb1 were recovered. In addition, it is known that gene Bt10 for loose smut resistance is closely linked to SrCad/Sr42. Therefore any genotype with SrCad/Sr42 will also carry Bt10. Therefore some genotypes recovered in this study will contain Lr34, Sr33, SrCad/Sr42, Bt10, and Fhb1. The Ug99 resistance genes Sr39 and SrCad/Sr42 have been added to the cultivars Carberry, Fusion, Hoffman, Scotia, and FL62R1 that are moderately resistant to FHB. In this way, enhanced gemplasm has been produced with Ug99 resistance in a background of moderate resistance to both leaf rust and FHB.

1 - Eastern Cereal and oilseeds Research Centre, Agriculture and Agri-Food Canada, 960 Carling Ave. , Ottawa, Ontario, K1A 0C6, Canada
2 - Eastern Cereal and oilseeds Research Centre, Agriculture and Agri-Food Canada, 960 Carling Ave. , Ottawa, Ontario, K1A 0C6, Canada
3 - Cereal Research Centre, Agriculture and Agri-Food Canada, Morden, Manitoba, R6M 1Y5, Canada
4 - Cereal Research Centre, Agriculture and Agri-Food Canada , Morden, MB , R6M 1Y5, Canada
5 - Agriculture and Agri-Food Canada, Eastern Cereal and Oilseed Research Centre, 960 Carling Avenue, Ottawa, ON, K1A 0C6, Canada
6 - Eastern Cereal and oilseeds Research Centre, Agriculture and Agri-Food Canada, 960 Carling Ave. , Ottawa, ON, K1A 0C6, Canada

Keywords:
Stem rust
leaf rust
fusarium head blight
wheat.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PGN003
Abstract ID:231
Candidate for Awards:None