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24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

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Axis 3: Genetic and functional bases of resistances to aphids

We characterize quantitative and qualitative resistances to aphids in the genetic diversity of peach (to the green peach aphid Myzus persicae) and melon (to Aphis gossypii) and we aims to develop durable resistances by studying their genetic and functional bases. We focus on qualitative resistances (R genes) that confer both resistance to aphids and to viruses that they transmit, in peach (Rm gene) and melon (Vat gene):

  • we characterize R genes and their homologs involved in the resistance (cloning and functional validation) and aphids effectors recognized by R genes. We study the resistance processes triggered by the recognition,
  • we assess the aphid adaptation to resistances (avoidance of recognition and adaptation to triggered processes). We aim to improve durability by modeling to define traits related to durability,  by identifying QTLs for these traits and ultimately, by combining R and QTL genes,
  • we develop biopesticides from secondary metabolites of peach involved in the resistance to the green peach aphid, which we found to be highly toxic to aphids

Relevant Publications

Chovelon, V., R. Feriche-Linares, G. Barreau, J. Chadoeuf, C. Callot, V. Gautier, M.-C. Le Paslier, A. Berard, P. Faivre-Rampant, J. Lagnel, N. Boissot (2021). "Building a cluster of NLR genes conferring resistance to pests and pathogens: the story of the Vat gene cluster in cucurbits." Horticulture Research 8(1). [link]

Mistral, P; Vanlerberghe-Masutti, F; Elbet S; Boissot, N (2021) Aphis gossypii/Aphis frangulae collected worldwide: Microsatellite markers data and genetic cluster assignment. Data in Brief 36. [link]

Monnot, S.; Desaint, H.; Mary-Huard, T.; Moreau, L.; Schurdi-Levraud, V.; Boissot, N. Deciphering the Genetic Architecture of Plant Virus Resistance by GWAS, State of the Art and Potential Advances. Cells 2021, 10, 3080. [link]

Schoeny, A., A. Desbiez, et al. (2017). Impact of Vat resistance in melon on viral epidemics and genetic structure of virus populations. Virus Research 241: 105-115. [link]

Boissot, N., A. Schoeny, et al. (2016). Vat, an amazing gene conferring resistance to aphids and viruses they carry: from molecular structure to field effects." Frontiers in Plant Science 7: 1420. [link]

Boissot, N., S. Thomas, et al. (2016). NBS-LRR-mediated resistance triggered by aphids: viruses do not adapt; aphids adapt via different mechanisms BMC Plant Biology 16: 25. [link]

Thomas, S., F. Vanlerberghe-Masutti, et al. (2016). Insight into the durability of aphid resistance from the demo-genetic study of Aphis gossypii populations in melon crops. Evolutionary Applications 9(6): 756-768. [link]

Dogimont, C., Chovelon, V., Pauquet, J., Boualem, A. and Bendahmane, A. (2014) The Vat locus encodes for a CC-NBS-LRR protein that confers resistance to Aphis gossypii infestation and A. gossypii-mediated virus resistance. Plant J, 80, 993-1004. [link]