Vulnerability of Barley to African Pathotypes of Puccinia graminis f.sp.tritici and Sources of Resistance
The emergence of widely virulent pathotypes (e.g., TTKSK in the Ug99 race group) of the stem rust pathogen (Puccinia graminis f.sp. tritici) in Africa threatens wheat production on a global scale. Although intensive research efforts have been advanced to address this threat in wheat, few studies have been conducted on barley, even though pathotypes such as TTKSK are known to attack the crop....
B. J. Steffenson, A. J. Case, Z. A. Pretorius, V. Coetzee, F. J. Kloppers, H. Zhou, Y. Chai, R. Wanyera, G. Macharia, S. Bhavani, and S. Grando
Phytopathology · Volume 107 · Issue 8 · 2017
Genetic analysis of resistance to stripe rust in some Iranian bread wheat cultivars and elite lines
Stripe rust is the most important disease of wheat in many wheat growing areas in Iran. Good knowledge of the genetic basis of resistance to stripe rust in commercial bread wheat cultivars and selected elite lines is an important objective in wheat breeding programs. This study aimed to identify resistance genes and modes of inheritance of stripe rust resistance in recently released Iranian...
A. Zakeri, F. Afshari, M. Yasaie, A. R. Nikzad, S. Rajaei
Crop Breeding Journal · 2017
Molecular Mapping of Stem Rust Resistance Loci Effective Against the Ug99 Race Group of the Stem Rust Pathogen and Validation of a Single Nucleotide Polymorphism Marker Linked to Stem Rust Resistance Gene Sr28
Wheat landrace PI 177906 has seedling resistance to stem rust caused by Puccinia graminis f. sp. tritici races TTKSK, TTKST, and BCCBC and field resistance to the Ug99 race group. Parents, 140 recombinant inbred lines, and 138 double haploid (DH) lines were evaluated for seedling resistance to races TTKSK and BCCBC. Parents and the DH population were evaluated for field...
E. M. Babiker, T. C. Gordon, S. Chao, M. N. Rouse, R. Wanyera, M. Acevedo, G. Brown-Guedira, and J. M. Bonman
Phytopathology · Volume 107 · Issue 2 · 2017
Comparative Analysis Highlights Variable Genome Content of Wheat Rusts and Divergence of the Mating Loci
Three members of the Puccinia genus, P. triticina (Pt), P. striiformis f.sp. tritici (Pst), and P. graminis f.sp. tritici (Pgt), cause the most common and often most significant foliar diseases of wheat. While similar in biology and life cycle, each species is uniquely adapted and specialized. The genomes of ...
Christina A. Cuomo, Guus Bakkeren, Hala Badr Khalil, Vinay Panwar, David Joly, Rob Linning, Sharadha Sakthikumar, Xiao Song, Xian Adiconis, Lin Fan, Jonathan M. Goldberg, Joshua Z. Levin, Sarah Young, Qiandong Zeng, Yehoshua Anikster, Myron Bruce, Meinan Wang, Chuntao Yin, Brent McCallum, Les J. Szabo, Scot Hulbert, Xiaming Chen, John P. Fellers
G3 · Volume 7 · Issue 2 · 2017
Identification and validation of single nucleotide polymorphic markers linked to Ug99 stem rust resistance in spring wheat
Wheat stem rust (Puccinia graminis f. sp. tritici Eriks. and E. Henn.) is one of the most destructive diseases world-wide. Races belonging to Ug99 (or TTKSK) continue to cause crop losses in East Africa and threaten global wheat production. Developing and deploying wheat varieties with multiple race-specific genes or complex adult plant resistance is necessary to achieve...
Long-Xi Yu, Shiaoman Chao, Ravi P. Singh, Mark E. Sorrells
PLoS One · 2017
Speed breeding for multiple disease resistance in barley
To respond faster to the changing climate, evolving pathogens and to feed a global population of 9–10 billion by 2050, plant breeders are exploring more efficient crop improvement strategies. In this study, we applied novel methodology for rapid trait introgression to the European two-rowed barley cultivar Scarlett. Scarlett is widely-grown in Argentina and is preferred for malting and brewing...
Lee T. Hickey, Silvia E. Germán, Silvia A. Pereyra, Juan E. Diaz, Laura A. Ziems, Ryan A. Fowler, Greg J. Platz, Jerome D. Franckowiak, Mark J. Dieters
Euphytica · Volume 213 · Issue 64 · 2017
Mining Vavilov’s Treasure Chest of Wheat Diversity for Adult Plant Resistance to Puccinia triticina
Leaf rust (LR) caused by Puccinia triticina, is among the most important diseases of wheat (Triticum aestivum L.) crops globally. Deployment of cultivars incorporating genetic resistance, such as adult plant resistance (APR) or all-stage resistance, is considered the most sustainable control method. APR is preferred for durability because it places lower selection pressure on the...
Riaz, A.; Athiyannan, N.; Periyannan, S.; Afanasenko, O.; Mitrofanova, O.; Aitken, E. A. B.; Lagudah, E.; Hickey, L. T.
Plant Disease · Volume 101 · Issue 2 · 2017
Genetic mapping of stem rust resistance to Puccinia graminis f. sp. tritici race TRTTF in the Canadian wheat cultivar harvest
Stem rust, caused by Puccinia graminis f. sp. tritici, is a destructive disease of wheat that can be controlled by deploying effective stem rust resistance (Sr) genes. Highly virulent races of P. graminis f. sp. tritici in Africa have been detected and characterized. These include race TRTTF and the Ug99 group of races such as TTKSK. Several Canadian and U.S. spring...
Hiebert, C. W.; Rouse, M. N.; Jayaveeramuthu Nirmala; Fetch, T.
Phytopathology · Volume 107 · Issue 2 · 2017
Highly predictive SNP markers for efficient selection of the wheat leaf rust resistance gene Lr16
Lr16 is a widely deployed leaf rust resistance gene in wheat (Triticum aestivum L.) that is highly effective against the North American Puccinia triticina population when pyramided with the gene Lr34. Lr16 is a seedling leaf rust resistance gene...
Kassa, M. T.; You, F. M.; Hiebert, C. W.; Pozniak, C. J.; Fobert, P. R.; Sharpe, A. G.; Menzies, J. G.; Humphreys, D. G.; Harrison, N. R.; Fellers, J. P.; McCallum, B. D.; McCartney, C. A.
BMC Plant Biology · Volume 17 · Issue 45 · 2017
Farmers' perceptions on improved bread wheat varieties and formal seed supply in Ethiopia
The paper presents smallholder farmers' perceptions on attributes of bread wheat varieties based on primary data collected from 524 households in four major wheat growing areas of Ethiopia. The results indicated high value of attainment indices for improved varieties compared to landraces, which shows how the demanded attributes are embodied more in improved ones. Grain yield and yellow and...
Bishaw, Z.; Alemu, D.
International Journal of Plant Production · Volume 11 · Issue 1 · 2017