Project final report

Molecular markers for broadening the genetic base of stem rust resistance genes effective against strain Ug99 - final report

Date released
04 March 2016
Publication Code

Harbans Bariana and Wolfgang Spielmeyer


Ug99 is a strain of stem rust first identified in Uganda in 1998 and confirmed in 1999. It attacks many commercial cultivars of wheat by overcoming important resistance genes, and there is evidence of its continued rapid evolution. Thus 50 million hectares - potentially 25% of the world's wheat - is at risk, with more than 90% of cultivars deemed susceptible along the predicted spore migration route.

This project involved Indian researchers and partners from the Australian Cereal Rust Control Program (ACRCP). Australia has gained from the experience in India, which is closer to the frontline of Ug99 impact based on movement of spores by wind and weather.

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