Reduced susceptibility to a tobacco bushy top virus malawi isolate by loss of function in host eif(Iso)4e genes
Breeding Science, ISSN: 1347-3735, Vol: 70, Issue: 3, Page: 313-320
2020
- 8Citations
- 9Captures
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Metrics Details
- Citations8
- Citation Indexes8
- CrossRef6
- Captures9
- Readers9
Article Description
Tobacco bushy top disease (TBTD) is a viral disease of tobacco (Nicotiana tabacum L.) caused by mixed infection of Tobacco bushy top virus or Ethiopian tobacco bushy top virus and a helper virus. Despite its damage to tobacco, practical genetic resources for disease resistance have not been found. Here, we report that a mutation of tobacco eIF(iso)4E genes (eIF(iso)4E-S and eIF(iso)4E-T), which encode eukaryotic translation initiation factors, confers resistance (reduced susceptibility) to TBTD caused by a virus from Malawi (designated as tobacco bushy top virus Malawi isolate, TBTV-MW). RNAi lines in which eIF(iso)4E genes were silenced showed reduced susceptibility to TBTV-MW. We also tested chemically-induced single (eIF(iso)4E-S or eIF(iso)4E-T) and double (eIF(iso)4E-S and eIF(iso)4E-T) nonsense mutants for resistance to TBTV-MW. Suppression of eIF(iso)4E-S showed reduced susceptibility, and the resistance of the double mutant tended to be even stronger. eIF(iso)4E mutants also showed reduced susceptibility to TBTV-MW transmitted by aphids. To the best of our knowledge, the eIF(iso)4E-S mutant is the first genetic resource for TBTD resistance breeding in tobacco.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85087173617&origin=inward; http://dx.doi.org/10.1270/jsbbs.19135; http://www.ncbi.nlm.nih.gov/pubmed/32714053; https://www.jstage.jst.go.jp/article/jsbbs/70/3/70_19135/_article; https://dx.doi.org/10.1270/jsbbs.19135; https://www.jstage.jst.go.jp/article/jsbbs/70/3/70_19135/_article/-char/en/; https://www.jstage.jst.go.jp/article/jsbbs/70/3/70_19135/_article/-char/ja/
Japanese Society of Breeding
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