In Vitro Cellular & Developmental Biology - Plant

, Volume 50, Issue 6, pp 665–672

Stable resistance to Wheat streak mosaic virus in wheat mediated by RNAi

Authors

  • Luisa F. Cruz
    • Department of Plant PathologyKansas State University
    • Department of Entomology and Plant PathologyAuburn University
  • Jessica L. Shoup Rupp
    • Department of Plant PathologyKansas State University
  • Harold N. Trick
    • Department of Plant PathologyKansas State University
    • Department of Plant PathologyUSDA-ARS, Hard Winter Wheat Genetics Research Unit
Biotechnology/Genetic Transformation/Functional Genomics

DOI: 10.1007/s11627-014-9634-0

Cite this article as:
Cruz, L.F., Rupp, J.L.S., Trick, H.N. et al. In Vitro Cell.Dev.Biol.-Plant (2014) 50: 665. doi:10.1007/s11627-014-9634-0

Abstract

Wheat streak mosaic virus (WSMV) is one of the major wheat viruses found in the Great Plains of the USA. Cultural practices are the primary methods of disease management, though not fully effective. Although genetic resistance is available, it is temperature sensitive and is sometimes closely linked with traits having negative agronomic effects. Alternative approaches to viral resistance are clearly needed. RNA interference (RNAi) has been shown to play a role in viral defense response and has been successfully used as a biotechnological tool to preprogram viral resistance in transgenic plants. In this work, a portion of the coat protein of WSMV was used as a hairpin construct and was co-transformed with pAHC20-bar to elicit viral resistance. Eleven WSMV RNAi independent transgenic events were obtained. Thirteen T1 lines were resistant as evident by the lack of viral RNA within the tissue. Beginning in the T2 generation, single-plant lineages were selected, selfed, and evaluated for resistance and presence of the transgene until the T5 generation. Families were then evaluated for the presence of the transgene, presence of the selectable marker, and WSMV resistance. Each of the lines in the T5 generation were resistant to the virus. Generational selection has maintained expression of the transgene and resistance to WSMV.

Keywords

Wheat streak mosaic virusStable expressionRNAiTransgenics

Supplementary material

11627_2014_9634_MOESM1_ESM.tiff (2.6 mb)
Supplemental Figure 1Lineage trees for transgenic Bobwhite expressing a hairpin construct of Wheat streak mosaic virus CP for T2 plants 110B4:1 and 110B8:9. Ratios represent number of plants that contain the gene of interest (GOI) and the number of GOI-positive plants that were resistant to infection of WSMV, as determined by ELISA (TIFF 2701 kb)
11627_2014_9634_Fig7_ESM.gif (394 kb)

High Resolution image (GIF 394 kb)

11627_2014_9634_MOESM2_ESM.tiff (2.6 mb)
Supplemental Figure 2Lineage trees for transgenic Bobwhite expressing a hairpin construct of Wheat streak mosaic virus CP for T2 plants 195A17 and 195A20. Ratios represent number of plants that contain the gene of interest (GOI) and the number of GOI-positive plants that were resistant to infection of WSMV, as determined by ELISA (TIFF 2701 kb)
11627_2014_9634_Fig8_ESM.gif (351 kb)

High Resolution image (GIF 394 kb)

Copyright information

© The Society for In Vitro Biology 2014