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Identification and QTL mapping of resistance to Turnip yellows virus (TuYV) in oilseed rape, Brassica napus

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Hackenberg, Dieter, Asare-Bediako, Elvis, Baker, Adam R., Walley, Peter Glen, Jenner, Carol E., Greer, Shannon, Bramham, Lawrence, Batley, Jacqueline, Edwards, David, Delourme, Regine, Barker, Guy C., Teakle, Graham R. and Walsh, John A. (2020) Identification and QTL mapping of resistance to Turnip yellows virus (TuYV) in oilseed rape, Brassica napus. Theoretical and Applied Genetics, 133 (2). pp. 383-393. doi:10.1007/s00122-019-03469-z

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Official URL: http://dx.doi.org/10.1007/s00122-019-03469-z

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Abstract

Turnip yellows virus (TuYV) is transmitted by the peach-potato aphid (Myzus persicae) and causes severe yield losses in commercial oilseed rape crops (Brassica napus). There is currently only one genetic resource for resistance to TuYV available in brassica, which was identified in the re-synthesised B. napus line ‘R54’. In our study, 27 mostly homozygous B. napus accessions, either doubled-haploid (DH) or inbred lines, representing a diverse subset of the B. napus genepool, were screened for TuYV resistance/susceptibility. Partial resistance to TuYV was identified in the Korean spring oilseed rape, B. napus variety Yudal, whilst the dwarf French winter oilseed rape line Darmor-bzh was susceptible. QTL mapping using the established Darmor-bzh × Yudal DH mapping population (DYDH) revealed one major QTL explaining 36% and 18% of the phenotypic variation in two independent experiments. A DYDH line was crossed to Yudal, and reciprocal backcross (BC1) populations from the F1 with either the susceptible or resistant parent revealed the dominant inheritance of the TuYV resistance. The QTL on ChrA04 was verified in the segregating BC1 population. A second minor QTL on ChrC05 was identified in one of the two DYDH experiments, and it was not observed in the BC1 population. The TuYV resistance QTL in ‘R54’ is within the QTL interval on Chr A04 of Yudal; however, the markers co-segregating with the ‘R54’ resistance are not conserved in Yudal, suggesting an independent origin of the TuYV resistances. This is the first report of the QTL mapping of TuYV resistance in natural B. napus.

Item Type: Journal Article
Subjects: Q Science > QK Botany
Q Science > QR Microbiology
S Agriculture > SB Plant culture
Divisions: Faculty of Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH): Turnip yellow mosaic virus, Turnip yellow mosaic virus -- Genome mapping, Rape (Plant), Rape (Plant) -- Diseases and pests
Journal or Publication Title: Theoretical and Applied Genetics
Publisher: Springer
ISSN: 0040-5752
Official Date: February 2020
Dates:
DateEvent
February 2020Published
5 November 2019Available
24 October 2019Accepted
Volume: 133
Number: 2
Page Range: pp. 383-393
DOI: 10.1007/s00122-019-03469-z
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDGhana Education Trust Fundhttp://dx.doi.org/10.13039/501100003419
BB/I017410/1[BBSRC] Biotechnology and Biological Sciences Research Councilhttp://dx.doi.org/10.13039/501100000268

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