Journal article
Identification of environmentally stable QTL for resistance against Leptosphaeria maculans in oilseed rape (Brassica napus)
Theoretical and Applied Genetics, Vol.129(1), pp.169-180
2016
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Abstract
<p><h3>Key message</h3> <p id="x-x-x-x-x-x-Par1"><strong>Six stable QTL for resistance against</strong> <em><strong>L. maculans</strong></em> <strong>(phoma stem canker) have been identified by QTL × environment interaction analysis using data from five winter oilseed rape field experiments</strong>. <h3>Abstract</h3> <p id="x-x-x-x-x-x-Par2">Phoma stem canker, caused by <em>Leptosphaeria maculans</em>, is a disease of worldwide importance on oilseed rape (<em>Brassica napus</em>). Quantitative trait loci (QTL)-mediated resistance against <em>L. maculans</em>in <em>B. napus</em> is considered to be race non-specific and potentially durable. Identification and evaluation of QTL for resistance to <em>L. maculans</em> is important for breeding oilseed rape cultivars with durable resistance. An oilseed rape mapping population was used to detect QTL for resistance against <em>L. maculans</em> in five winter oilseed rape field experiments under different environments. A total of 17 QTL involved in ‘field’ quantitative resistance against <em>L. maculans</em> were detected and collectively explained 51 % of the phenotypic variation. The number of QTL detected in each experiment ranged from two to nine and individual QTL explained 2–25 % of the phenotypic variation. QTL × environment interaction analysis suggested that six of these QTL were less sensitive to environmental factors, so they were considered to be stable QTL. Markers linked to these stable QTL will be valuable for selection to breed for effective resistance against <em>L. maculans</em>in different environments, which will contribute to sustainable management of the disease.</p>
Details
- Title
- Identification of environmentally stable QTL for resistance against Leptosphaeria maculans in oilseed rape (Brassica napus)
- Creators
- Y J Huang - University of HertfordshireC Jestin - Terres InoviaS J Welham - Rothamsted ResearchGraham J King - Southern Cross UniversityM J Manzanares-Dauleux - INRAB DL Fitt - University of HertfordshireR Delourme - INRA
- Publication Details
- Theoretical and Applied Genetics, Vol.129(1), pp.169-180
- Identifiers
- 1806; 991012821294602368
- Academic Unit
- Faculty of Science and Engineering; Southern Cross Plant Science; Science
- Resource Type
- Journal article