Rusholme, Rachel L., Higgins, Erin E., Walsh, John A. and Lydiate, Derek J.. (2007) Genetic control of broad-spectrum resistance to turnip mosaic virus in Brassica rapa (Chinese cabbage). Journal of General Virology, Vol.88 (Part 11). pp. 3177-3186. ISSN 0022-1317

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Abstract

The Brassica rapa line RLR22 was resistant to eight diverse turnip mosaic virus (TuMV) isolates. A B. rapa genetic map based on 213 marker loci segregating in 120 first back-cross (B-l) individuals was established and aligned with the B. rapa genome reference map using some of the RFLP probes. B, individuals were self-pollinated to produce B1S1, families. The existence of two loci controlling resistance to TuMV isolate CDN 1 was established from contrasting patterns of segregation for resistance and susceptibility in the B1S, families. The first gene, recessive TuMV resistance 01 (retr01), had a recessive allele for resistance, was located on the upper portion of chromosome R4 and was epistatic to the second gene. The second gene, Conditional TuMV resistance 01 (ConTR01), possessed a dominant allele for resistance and was located on the upper portion of chromosome R8. These genes also controlled resistance to TuMV isolate CZE 1 and might be sufficient to explain the broad-spectrum resistance of RLR22. The dominant resistance gene, ConTR01, was coincident with one of the three eukaryotic initiation factor 4E (el/F4E) loci of B. rapa and possibly one of the loci of elF(iso)4E. The recessive resistance gene retr01 was apparently coincident with one of the three loci of elF(iso)4E in the A genome of Brassica napus and therefore, by inference, in the B. rapa genome. This suggested a mode of action for the resistance that is based on denying the viral RNA access to the translation initiation complex of the plant host. The gene retr01 is the first reported example of a recessive resistance gene mapped in a Brassica species.

Item Type:	Journal Article
Subjects:	T Technology > TP Chemical technology Q Science > QR Microbiology > QR355 Virology
Divisions:	Faculty of Science > Life Sciences (2010- ) > Warwick HRI (2004-2010)
Journal or Publication Title:	Journal of General Virology
Publisher:	Society for General Microbiology
ISSN:	0022-1317
Date:	November 2007
Volume:	Vol.88
Number:	Part 11
Number of Pages:	10
Page Range:	pp. 3177-3186
Identification Number:	10.1099/vir.0.83194-0
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/31160

Data sourced from Thomson Reuters' Web of Knowledge

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