Characterisation of barley resistance to rhynchosporium on chromosome 6HS.

Characterisation of barley resistance to rhynchosporium on chromosome 6HS.
Theor Appl Genet. 2018 Dec 13;:
Authors: Coulter M, Büttner B, Hofmann K, Bayer M, Ramsay L, Schweizer G, Waugh R, Looseley ME, Avrova A
Abstract
KEY MESSAGE: Major resistance gene to rhynchosporium, Rrs18, maps close to the telomere on the short arm of chromosome 6H in barley. Rhynchosporium or barley scald caused by a fungal pathogen Rhynchosporium commune is one of the most destructive and economically important diseases of barley in the world. Testing of Steptoe × Morex and CIho 3515 × Alexis doubled haploid populations has revealed a large effect QTL for resistance to R. commune close to the telomere on the short arm of chromosome 6H, present in both populations. Mapping markers flanking the QTL from both populations onto the 2017 Morex genome assembly revealed a rhynchosporium resistance locus independent of Rrs13 that we named Rrs18. The causal gene was fine mapped to an interval of 660 Kb using Steptoe × Morex backcross 1 S2 and S3 lines with molecular markers developed from Steptoe exome capture variant calling. Sequencing RNA from CIho 3515 and Alexis revealed that only 4 genes within the Rrs18 interval were transcribed in leaf tissue with a serine/threonine protein kinase being the most likely candidate for Rrs18.
PMID: 30547184 [PubMed - as supplied by publisher]

Source: TAG. Theoretical and Applied Genetics - December 13, 2018 Category: Genetics & Stem Cells Authors: Coulter M, Büttner B, Hofmann K, Bayer M, Ramsay L, Schweizer G, Waugh R, Looseley ME, Avrova A Tags: Theor Appl Genet Source Type: research