Naslov
Postulation and mapping of leaf, stem and stripe rust resistance in Option/Potent population

Autori
Singh, Davinder ; Španić, Valentina ; Park, Robert F.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings 13th International Wheat Genetics Symposium / Buerstmayr, Hermann ; Lang-Mlader, Christina ; Steiner, Barbara ; Michel, Sebastian ; Buerstmayr, Maria ; Lemmens, Marc ; Vollmann, Johann ; Grausgruber, Heinrich - Tulln : The University of Natural Resources and Life Sciences, Vienna (BOKU), 2017, 258-258

ISBN
978-3-900932-48-0

Skup
International Wheat Genetics Symposium

Mjesto i datum
Tulln, Austrija, 23.04.2017. - 28.04.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Leaf rust, Stem rust ; Stripe rust

Sažetak
The wheat rust diseases, stem rust, leaf rust and yellow rust, caused by Puccinia graminis, P. triticina and P. striiformis respectively, are destructive diseases worldwide and sometimes can cause severe losses by reducing grain yield and quality. Wheat breeders often place high priority on ensuring improved resistance to new and old races of these three rust diseases in new varieties. Breeding for durable resistance to rust is important, but also is a challenge due to the complexity of interactions among resistance genes and to the wide diversity and continuous evolution of the pathogen races. In our research we studied rust resistance in mapping population Option/Potent because it is known from previous studies that Potent is a good source of adult-plant resistance to leaf rust. The seedling resistance to leaf rust of 96 lines together with parents was tested in the greenhouse by tests with a range of P. triticina pathotypes that included a newly detected one (104-1, 3, 4, 6, 7, 8, 9, 10, 11, 12+Lr37) that combines virulence for three genes (the complementary genes Lr27+Lr31, Lr15 and Lr28). Infection types on the seedlings were scored 14 days after inoculation on a “0”–“4” scale. The data obtained from the seedling tests confirmed that the resistance was due to a combination of several genes. We detected that the population carries the completely linked genes Lr26-Yr9-Sr31, associated with 1BL/1RS translocation in bread wheat lines and Lr37-Sr38-Yr17, which is present in many European wheat varieties. We also concluded that Option and Potent share either Lr13 or Lr42. Quantitative trait loci associated with adult plant resistance to leaf rust, stripe rust and stem rust severity will be mapped using DArT markers, which will give us clear confirmation of potentially novel resistance sources to the three rust diseases. In 2013, an epidemic of yellow rust occurred in Europe. Therefore, across Europe it is important to find new genotypes with effective resistance genes for new winter varieties.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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