Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (2): 361-368.DOI: 10.16178/j.issn.0528-9017.20240735

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Creation and analysis of TMV⁃resistant flue⁃cured tobacco line TMV⁃3 based on variety Qushou 1

LI Xuejun1(), LI Jianhua2, GUO Jing1, WANG Yale1, SUN Jiping1, SUN Huan1, PING Wenli1, LI Lihua3()   

  1. 1.Tobacco Research Institute of Henan Academy of Agricultural Sciences,Key Laboratory of Green Prevention and Control of Tobacco Diseases and Pests in Huanghuai Tobacco Area of Tobacco Industry,Xuchang 461000,Henan
    2.Henan Xuchang Tobacco Company,Xuchang 461000,Henan
    3.Henan Luoyang Tobacco Company,Luoyang 471000,Henan
  • Received:2024-09-23 Online:2026-02-28 Published:2026-03-07

Abstract:

In order to targeted improve the resistance of flue-cured tobacco variety Qushou 1 to tobacco mosaic virus (TMV),Qushou 1 was used as the improved material,and the TMV-immune variety Va770 was used as the donor parent. Through hybridization,backcrossing,molecular markers combined with phenotypic screening,TMV-immune homozygous lines TMV-3 were obtained. The agronomic traits of TMV-3 were basically consistent with Qushou 1. Inoculation identification results indicated that the resistance of TMV-3 was immune to TMV. After TMV treatment,compared with Qushou 1,TMV-3 accumulated less reactive oxygen species,and the expression of TMV positive regulatory genes NtRAR1NtNTF4NtPR1 aNtHAK1 and NtSGT1 were higher,negative regulatory gene TMV-CP was lower in leaves. In addition,the resistance of TMV-3 to black shank decreased. This study demonstrated that TMV-3,Qushou 1 directional improved line,was immune to TMV,and other traits were basically consistent with Qushou 1,which provided a material basis for the targeted improvement of virus disease resistance of Qushou 1.

Key words: flue-cured tobacco, tobacco mosaic virus(TMV), Qushou 1, TMV-3 line

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