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Investigating successive Australian barley breeding populations for stable resistance to leaf rust.
Ziems, L A; Franckowiak, J D; Platz, G J; Mace, E S; Park, R F; Singh, D; Jordan, D R; Hickey, L T.
Afiliación
  • Ziems LA; Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD, 4072, Australia. l.ziems@uq.edu.au.
  • Franckowiak JD; Department of Agronomy and Plant Genetics, University of Minnesota, St Paul, MN, 55108, USA.
  • Platz GJ; Department of Agriculture and Fisheries, Hermitage Research Facility, Warwick, QLD, 4370, Australia.
  • Mace ES; Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD, 4072, Australia.
  • Park RF; Department of Agriculture and Fisheries, Hermitage Research Facility, Warwick, QLD, 4370, Australia.
  • Singh D; The University of Sydney, Plant Breeding Institute, Narellan, NSW, 2567, Australia.
  • Jordan DR; The University of Sydney, Plant Breeding Institute, Narellan, NSW, 2567, Australia.
  • Hickey LT; Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD, 4072, Australia.
Theor Appl Genet ; 130(11): 2463-2477, 2017 Nov.
Article en En | MEDLINE | ID: mdl-28836114
KEY MESSAGE: Genome-wide association studies of barley breeding populations identified candidate minor genes for pairing with the adult plant resistance gene Rph20 to provide stable leaf rust resistance across environments. Stable resistance to barley leaf rust (BLR, caused by Puccinia hordei) was evaluated across environments in barley breeding populations (BPs). To identify genomic regions that can be combined with Rph20 to improve adult plant resistance (APR), two BPs genotyped with the Diversity Arrays Technology genotyping-by-sequencing platform (DArT-seq) were examined for reaction to BLR at both seedling and adult growth stages in Australian environments. An integrated consensus map comprising both first- and second-generation DArT platforms was used to integrate QTL information across two additional BPs, providing a total of four interrelated BPs and 15 phenotypic data sets. This enabled identification of key loci underpinning BLR resistance. The APR gene Rph20 was the only active resistance region consistently detected across BPs. Of the QTL identified, RphQ27 on chromosome 6HL was considered the best candidate for pairing with Rph20. RphQ27 did not align or share proximity with known genes and was detected in three of the four BPs. The combination of RphQ27 and Rph20 was of low frequency in the breeding material; however, strong resistance responses were observed for the lines carrying this pairing. This suggests that the candidate minor gene RphQ27 can interact additively with Rph20 to provide stable resistance to BLR across diverse environments.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedades de las Plantas / Hordeum / Basidiomycota / Resistencia a la Enfermedad / Fitomejoramiento Tipo de estudio: Prognostic_studies País/Región como asunto: Oceania Idioma: En Revista: Theor Appl Genet Año: 2017 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedades de las Plantas / Hordeum / Basidiomycota / Resistencia a la Enfermedad / Fitomejoramiento Tipo de estudio: Prognostic_studies País/Región como asunto: Oceania Idioma: En Revista: Theor Appl Genet Año: 2017 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania