Stem rust resistance in 1BL.1RS and 2RL.2BS double wheat-rye translocation lines

Mahbubjon Rahmatov, Larisa Garkava-Gustavsson, Ruth Wanyera, Brian Steffenson, Matthew Rouse and Eva Johansson
Additional contact information
Mahbubjon Rahmatov: Department of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp, Sweden
Larisa Garkava-Gustavsson: Department of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp, Sweden
Ruth Wanyera: Food Crops Research Center, Kenyan Agricultural and Livestock Research Organization (KALRO), Njoro, Kenya
Brian Steffenson: Department of Plant Pathology, University of Minnesota, St. Paul, USA
Matthew Rouse: Cereal Disease Laboratory, United States Department of Agriculture - Agricultural Research Service, St. Paul, USA$2
Eva Johansson: Department of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp, Sweden

Czech Journal of Genetics and Plant Breeding, 2015, vol. 51, issue 4, 148-154

Abstract: The wheat stem rust pathogen, Puccinia graminis f.sp. tritici, is a significant and devastating disease of wheat crops worldwide. Wheat has many wild relatives in which to source new resistance genes, including the cereal crop of rye in the tertiary genepool. The aim of this study was to assess the reaction of 1BL.1RS and 2RL.2BS double wheat-rye translocation lines to virulent stem rust races from Africa and North America. BC1F3 and BC1F4 populations from a cross between the line KR99-139 (a double wheat-rye translocation line with 1BL.1RS and 2RL.2BS) and the bread wheat cultivar Topper were used in the study. Several of the populations homozygous for 1BL.1RS and heterozygous for 2RL.2BS showed resistance and low severity adult plant resistance (20RMR-50MSS) to the African stem rust race TTKSK in the field. None of the tested populations with varying chromosome combinations showed seedling resistance to any of the tested stem rust races. Thus, these resistant populations likely carry gene/s effective at the adult plant stage since all stage resistance genes with major effect appear to be absent based on the seedling assays. Resistant lines combined three chromosomes (1RS, 2RS and 2BS) which make their direct use in breeding more complicated. Mapping studies followed by potential transfer of genes between 2R and 2B will make the identified minor genes more useful in wheat breeding.

Keywords: backcrossing; durable resistance; minor genes; Puccinia graminis f.sp. tritici (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://cjgpb.agriculturejournals.cz/doi/10.17221/80/2015-CJGPB.html (text/html)
http://cjgpb.agriculturejournals.cz/doi/10.17221/80/2015-CJGPB.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjg:v:51:y:2015:i:4:id:80-2015-cjgpb

DOI: 10.17221/80/2015-CJGPB

Access Statistics for this article

Czech Journal of Genetics and Plant Breeding is currently edited by Ing. Markéta Knížková, (Executive Editor)

More articles in Czech Journal of Genetics and Plant Breeding from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().