Funding Partners: Alberta Wheat Commission (AWC), Alberta Innovates & Bio Solutions, Western Grains Research Foundation (WGRF)
This project involves the development of wheat and barley germplasm with resistance to two important diseases: Fusarium head blight (FHB) and tan spot.
FHB results in deoxynivalenol (DON) toxin contamination of the grain. High levels of genetic resistance against FHB infection and DON accumulation are the most effective means to reduce the impact of this disease. Unfortunately, few highly resistant lines possess good agronomic adaptation, broad disease resistance, and suitable end-use quality, making FHB resistance breeding a daunting task. Furthermore, cultivar development is a long-term undertaking, requiring labour-intensive, early generation screening followed by extensive agronomic testing over several environments.
Tan spot, caused by Pyrenophora tritici-repentis (Ptr), is the most destructive leaf spot disease of wheat in Western Canada. Recent reports indicate that Canadian barley cultivars are also susceptible to an emergent Ptr race in North America. The researchers have successfully employed an in vitro selection (IVS) method for producing doubled haploid (DH) wheat lines with resistance to FHB and DON. IVS can rapidly incorporate genetic resistance into susceptible germplasm, with resistance levels that may exceed that of either parent line. The objective of this project is to produce improved DH wheat and barley germplasm with high levels of resistance to FHB and DON accumulation and to extend the use of IVS technology to incorporate selection for tan spot resistance.
Plant diseases are responsible for at least 10% of yield losses in global food production. Incidence and severity of two important cereal crop diseases, Fusarium head blight (FHB) and tan spot are increasing with the impacts of climate change. FHB is responsible for mycotoxin contamination of grains and both diseases lead to significant yield damage. It was recently determined that barley, which was thought to be inherently resistant to tan spot, is susceptible to a race of the pathogen that has been identified in Canada.
We employed an in vitro selection method to produce wheat and barley germplasm to high levels of resistance to these diseases. Over this project, we developed 4987 lines using breeder crosses, of 4165 lines were provided to the participating breeding programs. These lines are at different stages of the selection process towards cultivar registration, including a total of 21 wheat lines generated from this and the previous funding cycle which are currently in pre-registration or registration trials.