Prosiectau fesul blwyddyn
Crynodeb
Diseases caused by crown rust (Puccinia coronata f. sp. avenae) and powdery mildew (Blumeria graminis f. sp. avenae) are among the most important constraints for the oat crop. Breeding for resistance is one of the most effective, economical, and environmentally friendly means to control these diseases. The purpose of this work was to identify elite alleles for rust and powdery mildew resistance in oat by association mapping to aid selection of resistant plants. To this aim, 177 oat accessions including white and red oat cultivars and landraces were evaluated for disease resistance and further genotyped with 31 simple sequence repeat and 15,000 Diversity Arrays Technology (DArT) markers to reveal association with disease resistance traits. After data curation, 1712 polymorphic markers were considered for association analysis. Principal component analysis and a Bayesian clustering approach were applied to infer population structure. Five different general and mixed linear models accounting for population structure and/or kinship corrections and two different statistical tests were carried out to reduce false positive. Five markers, two of them highly significant in all models tested were associated with rust resistance. No strong association between any marker and powdery mildew resistance at the seedling stage was identified. However, one DArT sequence, oPt-5014, was strongly associated with powdery mildew resistance in adult plants. Overall, the markers showing the strongest association in this study provide ideal candidates for further studies and future inclusion in strategies of marker-assisted selection.
Iaith wreiddiol | Saesneg |
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Rhif yr erthygl | 103 |
Cyfnodolyn | Frontiers in Plant Science |
Cyfrol | 6 |
Rhif cyhoeddi | MAR |
Dynodwyr Gwrthrych Digidol (DOIs) | |
Statws | Cyhoeddwyd - 05 Maw 2015 |
Ôl bys
Gweld gwybodaeth am bynciau ymchwil 'Genome-wide association study for crown rust (Puccinia coronata f. sp. avenae) and powdery mildew (Blumeria graminis f. sp. avenae) resistance in an oat (Avena sativa) collection of commercial varieties and landraces'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.Proffiliau
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Catherine Howarth
- Athrofa y Gwyddorau Biolegol, Amgylcheddol a Gwledig - Reader - IBERS
Unigolyn: Dysgu ac Ymchwil
Prosiectau
- 3 Wedi Gorffen
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Developing tools and resources for oat breeding
Armstead, I. (Prif Ymchwilydd)
01 Ebr 2012 → 31 Maw 2017
Prosiect: Ymchwil a ariannwyd yn allanol
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Generation of Oat varieties with enhanced resistance to crown rust and mildew
Marshall, A. (Prif Ymchwilydd)
Engineering & Physical Sciences Research Council
10 Hyd 2010 → 30 Medi 2015
Prosiect: Ymchwil a ariannwyd yn allanol
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Harnessing new technologies for sustainable oat production and utilisation (QUOATS)
Marshall, A. (Prif Ymchwilydd)
Biotechnology and Biological Sciences Research Council
14 Medi 2009 → 13 Medi 2014
Prosiect: Ymchwil a ariannwyd yn allanol