Genes for Virus Coat OR Capsid Protein from Positive  Strand RNA Viruses - Coat protein gene from tobacco mosaic virus (TMV), classified as a positive strand RNA virus, has been transferred to tobacco and in the transgenic plant, expression of coat protein (CP) was observed.
Further, when inoculated with TMV, the infection in the transgenic plants was very low and delayed relative to control plants that were not transformed. This provides a new approach for producing virus resistant plants complementing the efforts of classical plant breeding in producing disease resistant crop varieties.

However, in such transgenic plants, coat protein gene should be constitutively expressed and may thus have effects on the nutritional value of plants.