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Building on previous research to detect crown rot resistance in durum backgrounds, work has been conducted to combine multiple minor resistances from diverse sources including a wild species. Some of these sources have been poorly adapted so multiple crosses and rounds of selection have been required to return to lines with good yield potential.
The research has developed 12 lines with useful resistance (MS) and suitable yield response that are now being extensively evaluated in crown rot inoculated field trials in another SAGIT-funded project with the Southern Australia Durum Grower’s Association (SADGA).

BACKGROUND

Previous work has shown that the best sources for resistance to crown rot are bread wheat varieties and wild related species. Efforts to transfer these resistances has led to lines with very poor agronomic adaptation and so extensive crossing and selection has been required to develop lines with both resistance, quality and good yield potential.

Start:

July 2014

Finish:

June 2017

Project participants

South Australian Research and Development Institute (a group of the Department of Primary Industries and Regions): Hugh Wallwork.

The problem

Growers need durum wheat varieties with some resistance to crown rot as all current varieties are very susceptible.

The research

Crown rot resistance has been sought from a wild related species and bread wheats to gain useful levels of resistance. Multiple crosses have been made to adapted durums to ensure good yield potential.

More information

Hugh Wallwork
SARDI
0427 001 568
[email protected]

Research aims

The core objectives of the project were to expand on previous SARDI research identifying resistance to crown rot in some durum lines to develop well-adapted durum breeding lines with effective resistance with a view to commercialise these lines in the future.

In the field

A wild wheat species Triticum dicoccon, the bread wheat variety Kukri and a durum line developed from bread wheat for stress tolerance by Dr Tony Rathjen of the University of Adelaide were used in this research.

Preliminary quality tests were also conducted as a part of this research using Near Infra-Red (NIR) measurements on shortlisted lines to screen for quality attributes.

Results

A wild wheat species Triticum dicoccon, the bread wheat variety Kukri and a durum line developed from bread wheat for stress tolerance by Dr Tony Rathjen of the University of Adelaide were used in this research.

Preliminary quality tests were also conducted as a part of this research using Near Infra-Red (NIR) measurements on shortlisted lines to screen for quality attributes.

Value for growers

With further time and ongoing support, delivery of durum wheat lines with good levels of crown rot resistance will eventuate.

This will provide growers with varietal options in this space and could lead to a significant expansion of the area sown to durum wheats.

The reduced risk of crown rot in these potential varieties will offset some reduction in yield that may be associated.