Mapping Net Blotch Resistance in ‘Nomini’ and CIho 2291 Barley

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....

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Published inCrop science Vol. 54; no. 6; pp. 2596 - 2602
Main Authors O'Boyle, P. D., Brooks, W. S., Barnett, M. D., Berger, G. L., Steffenson, B. J., Stromberg, E. L., Maroof, M. A. Saghai, Liu, S.Y., Griffey, C. A.
Format Journal Article
LanguageEnglish
Published Madison The Crop Science Society of America, Inc 01.11.2014
American Society of Agronomy
Subjects
Barley
Chromosomes
Crop diseases
Gene loci
Genomics
Genotype & phenotype
Population
Studies
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Summary: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 designated Rpt‐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) and Bmag0500 (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.
Bibliography:All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher.
ISSN:0011-183X
1435-0653
DOI:10.2135/cropsci2013.08.0514