Mapping net blotch resistance in ‘Nomini’ and CIho 2291 barley

P. D. O’Boyle, W. S. Brooks, M. D. Barnett, G. L. Berger, B. J. Steffenson, E. L. Stromberg, M. A. Saghai Maroof, S. Y. Liu, C. A. Griffey

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Net blotch (Pyrenophora teres) is one of the most devastating diseases of barley (Hordeum vulgare L.) worldwide. Identification of diagnostic molecular markers associated with genes and quantitative trait loci (QTL) for net blotch resistance will facilitate pyramiding of independent genes. Linkage mapping was used to identify chromosomal locations of the independent, dominant genes conditioning net blotch resistance in the winter barley ‘Nomini’ (PI 566929) and spring barley CIho 2291. The F2 populations of 238 and 193 individuals, derived from crosses between the susceptible spring barley parent ‘Hector’ (CIho 15514) and the resistant parents Nomini and CIho 2291, respectively, were used to map the genes governing resistance in the resistant parents. The dominant gene governing resistance in Nomini, temporarily designated Rpt-Nomini, was mapped to a 9.2-cM region of barley chromosome 6H between the flanking microsatellite markers Bmag0344a (r2 = 0.7) and Bmag0103a (r2 = 0.9), which were 6.8 and 2.4 cM away from Rpt-Nomini, respectively. The dominant gene governing resistance in CIho 2291, temporarily designatedRpt-CIho2291, was mapped to a 34.3-cM interval on the distal region of barley chromosome 6H between the flanking microsatellite markers Bmag0173 (r2 = 0.65) andBmag0500 (r2 = 0.26), which were 9.9 and 24.4 cM away from Rpt-CIho2291, respectively. Identification of the chromosomal location of Rpt-Nomini and Rpt-CIho2291 will facilitate efforts in pyramiding multiple genes for net blotch resistance.

Original languageEnglish (US)
Pages (from-to)2596-2602
Number of pages7
JournalCrop Science
Volume54
Issue number6
DOIs
StatePublished - Nov 1 2014

Bibliographical note

Publisher Copyright:
© Crop Science Society of America.

Fingerprint

Dive into the research topics of 'Mapping net blotch resistance in ‘Nomini’ and CIho 2291 barley'. Together they form a unique fingerprint.

Cite this