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Mapping of QTL for resistance to powdery mildew and resistance gene analogues in perennial ryegrass.
- Source :
-
Plant Breeding . Aug2008, Vol. 127 Issue 4, p368-375. 8p. 1 Diagram, 5 Charts. - Publication Year :
- 2008
-
Abstract
- The objective of this study was to map resistance gene analogues (RGA) and quantitative trait loci (QTL) for powdery mildew resistance in perennial ryegrass ( Lolium perenne L.). The mapping population consisted of 184 F2 genotypes produced from a cross between one genotype of a synthetic perennial ryegrass variety Veyo and one genotype from the perennial ryegrass ecotype Falster. The greenhouse infection was measured as number of sporulating colonies on a 10-cm leaf area with the maximum possible number of colonies to be counted set to 50. The range of infection scores in the population was 0–50 and the heritability was 71.7%. In total, two QTL for powdery mildew resistance were identified, and mapped to linkage groups (LG) LG3 and LG7. Individually, these QTL explained between 7.5% and 22.1% of the total phenotypic variation. Six RGA and three laccases were mapped to LG2, LG3, LG4, LG5 and LG7, however, no close linkage between RGA and QTL was observed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GENETIC research
*GENE mapping
*RYEGRASSES
*POWDERY mildew diseases
*PHENOTYPES
Subjects
Details
- Language :
- English
- ISSN :
- 01799541
- Volume :
- 127
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Plant Breeding
- Publication Type :
- Academic Journal
- Accession number :
- 33103756
- Full Text :
- https://doi.org/10.1111/j.1439-0523.2007.01477.x