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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Molecular mapping of cereal cyst nematode resistance in Triticum monococcum L. and its transfer to the genetic background of cultivated wheat
Euphytica, Volume 176, No. 2, Year 2010
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Description
Triticum monococcum, the diploid A genome species, harbours enormous variability for resistance to biotic stresses. A spring type T. monococcum acc. 14087 was found to be resistant to Heterodera avenae (cereal cyst nematode, CCN). A recombinant inbred line population (RIL) developed by crossing this accession with a CCN susceptible T. boeoticum acc. 5088 was used for studying the inheritance and map location of the CCN resistance. Based on composite interval mapping two QTL, one each on chromosome 1AS and 2AS, were detected. The QTL on 1A, designated as Qcre. pau-1A, appeared to be a major gene with 26% contribution to the overall phenotypic variance whereas the QTL on 2A designated as Qcre. pau-2A contributed 13% to total phenotypic variation. Qcre. pau-1A is novel, being the only CCN resistance gene mapped in any 'A' genome species and none of the other known genes have been mapped on chromosome 1A. The QTL Qcre. pau-2A might be allelic to Cre5, a CCN resistance gene transferred from Ae. ventricosa and mapped on 2AS. The Qcre. pau-1A was transferred to cultivated wheat using T. durum cv. PBW114 as the bridging species. Selected CCN resistant F8 lines showed introgression for the molecular markers identified to be linked with CCN resistance locus Qcre. pau-1A. Thus, this gene alone could impart complete resistance against CCN. These introgression lines can be used for marker-assisted transfer of Qcre. pau-1A to elite wheat cultivars. © 2010 Springer Science+Business Media B.V.
Authors & Co-Authors
Singh, Kuldeep B.
India, Ludhiana
Punjab Agricultural University
Chhuneja, Parveen
India, Ludhiana
Punjab Agricultural University
Singh, I.
India, Ludhiana
Punjab Agricultural University
Sharma, Sanjeev Kumar
India, Ludhiana
Punjab Agricultural University
Garg, Tosh
India, Ludhiana
Punjab Agricultural University
Garg, Monika
India, Ludhiana
Punjab Agricultural University
Lebanon, Beirut
International Center for Agricultural Research in the Dry Areas Syria
Keller, Beat
Switzerland, Zurich
Universität Zürich
Dhaliwal, H. S.
India, Ludhiana
Punjab Agricultural University
India, Roorkee
Indian Institute of Technology Roorkee
Statistics
Citations: 23
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1007/s10681-010-0227-7
ISSN:
00142336
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study