Quantitative trait loci for partial resistance to crown rust, Puccinia coronata, in cultivated oat, Avena sativa L
| Autor: | G. E. Ochocki, H. W. Rines, D. D. Stuthman, V. A. Portyanko, G. Chen, Kurt J Leonard, Ronald L. Phillips |
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| Rok vydání: | 2005 |
| Předmět: |
Avena
Quantitative Trait Loci Population Flowers Biology Quantitative trait locus Rust Puccinia coronata Inbred strain Genetics education Crosses Genetic Plant Diseases education.field_of_study Basidiomycota fungi Chromosome Mapping food and beverages General Medicine Heritability biology.organism_classification Immunity Innate Amplified fragment length polymorphism Restriction fragment length polymorphism Nucleic Acid Amplification Techniques Agronomy and Crop Science Polymorphism Restriction Fragment Length Biotechnology |
| Zdroj: | Theoretical and Applied Genetics. 111:313-324 |
| ISSN: | 1432-2242 0040-5752 |
| DOI: | 10.1007/s00122-005-2024-6 |
| Popis: | To facilitate the detection of quantitative trait loci (QTLs) for partial resistance to oat crown rust, Puccinia coronata f. sp. avenae Eriks., a genetic map was generated in a population of 158 F(6)-derived oat recombinant inbred lines from a cross of a partial resistance line MN841801-1 by a susceptible cultivar selection 'Noble-2'. The map, developed using 230 marker loci, mostly restriction fragment length polymorphism and amplified fragment length polymorphism markers, spanned 1,509 cM (Haldane) arranged into 30 linkage groups of 2-18 markers each. Four consistently detected major QTLs for partial rust resistance, Prq1a, Prq1b, Prq2, and Prq7, and three minor QTLs, Prq3, Prq5, and Prq6, were found in tests involving three field and two greenhouse environments. In addition, two major QTLs for flowering time, Ftq1 and Ftq7, and five weaker QTLs, Ftq2, Ftq3, Ftq4, Ftq5, and Ftq6, were revealed. Overlapping of the map segments of Ftq1 and Prq1 and of Ftq7 and Prq7 suggested either linkage between the flowering time QTLs and resistance QTLs or a pleiotropic effect of the Ftq QTLs on rust resistance. Relatively low heritability estimates (0.30) obtained for partial resistance to crown rust in the field indicate a potential value for marker-assisted selection. |
| Databáze: | OpenAIRE |
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