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dc.contributor.authorHuang, Yongju
dc.contributor.authorFitt, Bruce
dc.contributor.authorKing, Graham
dc.contributor.authorDelourme, Regine
dc.date.accessioned2019-09-25T00:09:12Z
dc.date.available2019-09-25T00:09:12Z
dc.date.issued2019-09-12
dc.identifier.citationHuang , Y , Fitt , B , King , G & Delourme , R 2019 , ' Oilseed rape (Brassica napus) resistance to growth of Leptosphaeria maculans in leaves of young plants contributes to quantitative resistance in stems of adult plants : Resistance to growth of Leptosphaeria maculans in leaves of young plants ' , PLoS ONE , vol. 14 , no. 9 , e0222540 , pp. 1-20 . https://doi.org/10.1371/journal.pone.0222540
dc.identifier.issn1932-6203
dc.identifier.otherPURE: 17415122
dc.identifier.otherPURE UUID: 5df20f40-52f5-4296-a835-7cbc9f8c9f9f
dc.identifier.otherScopus: 85072147221
dc.identifier.urihttp://hdl.handle.net/2299/21700
dc.description© 2019 Huang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.description.abstractKey message: One QTL for resistance against Leptosphaeria maculans growth in leaves of young plants in controlled environments overlapped with one QTL detected in adult plants in field experiments The fungal pathogen Leptosphaeria maculans initially infects leaves of oilseed rape (Brassica napus) in autumn in Europe and then grows systemically from leaf lesions along the leaf petiole to the stem, where it causes damaging phoma stem canker (blackleg) in summer before harvest. Due to the difficulties of investigating resistance to L. maculans growth in leaves and petioles under field conditions, identification of quantitative resistance typically relies on end of season stem canker assessment on adult plants. To investigate whether quantitative resistance can be detected in young plants, we first selected nine representative DH (doubled haploid) lines from an oilseed rape DY (‘Darmor-bzh’ × ‘Yudal’) mapping population segregating for quantitative resistance against L. maculans for controlled environment experiment (CE). We observed a significant correlation between distance grown by L. maculans along the leaf petiole towards the stem (r = 0.91) in CE experiments and the severity of phoma stem canker in field experiments. To further investigate quantitative trait loci (QTL) related to resistance against growth of L. maculans in leaves of young plants in CE experiments, we selected 190 DH lines and compared the QTL detected in CE experiments with QTL related to stem canker severity in stems of adult plants in field experiments. Five QTL for resistance to L. maculans growth along the leaf petiole were detected; collectively they explained 35% of the variance. Two of these were also detected in leaf lesion area assessments and each explained 10-12% of the variance. One QTL on A02 co-localized with a QTL detected in stems of adult plants in field experiments. This suggests that resistance to the growth of L. maculans from leaves along the petioles towards the stems contributes to the quantitative resistance assessed in stems of adult plants in field experiments at the end of the growing season.en
dc.format.extent20
dc.language.isoeng
dc.relation.ispartofPLoS ONE
dc.subjectBiochemistry, Genetics and Molecular Biology(all)
dc.subjectAgricultural and Biological Sciences(all)
dc.titleOilseed rape (Brassica napus) resistance to growth of Leptosphaeria maculans in leaves of young plants contributes to quantitative resistance in stems of adult plants : Resistance to growth of Leptosphaeria maculans in leaves of young plantsen
dc.contributor.institutionAgriculture, Veterinary and Food Sciences
dc.contributor.institutionGeography, Environment and Agriculture
dc.contributor.institutionCrop and Environmental Protection
dc.contributor.institutionDepartment of Biological and Environmental Sciences
dc.contributor.institutionSchool of Life and Medical Sciences
dc.contributor.institutionWeight and Obesity Research Group
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85072147221&partnerID=8YFLogxK
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1371/journal.pone.0222540
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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