Genome editing for resistance against plant pests and pathogens

• Published in: Transgenic research 2021-08, Vol.30 (4), p.427-459
• Main Authors: Rato, Cláudia, Carvalho, Miguel F., Azevedo, Cristina, Oblessuc, Paula Rodrigues
• Format: Article
• Language: English
• Subjects: Animal Genetics and Genomics; Biological control; Biomedical and Life Sciences; Biomedical Engineering/Biotechnology; CRISPR; CRISPR-Cas Systems; Crops; Cultivars; Disease Resistance - genetics; Disease Resistance - immunology; Gene Editing; Gene silencing; Genetic Engineering; Genome editing; Genome Editing in Plants; Genome, Plant; Genomes; Life Sciences; Molecular Medicine; Pathogens; Pest control; Pest resistance; Pests; Plant breeding; Plant Diseases - genetics; Plant Diseases - immunology; Plant Diseases - microbiology; Plant Diseases - parasitology; Plant Genetics and Genomics; Plant protection; Plants - genetics; Plants - immunology; Plants, Genetically Modified - genetics; Sustainable agriculture; Transgenics; Virulence factors
• ISSN: 0962-8819; 1573-9368
• DOI: 10.1007/s11248-021-00262-x

The conventional breeding of crops struggles to keep up with increasing food needs and ever-adapting pests and pathogens. Global climate changes have imposed another layer of complexity to biological systems, increasing the challenge to obtain improved crop cultivars. These dictate the development and application of novel technologies, like genome editing (GE), that assist targeted and fast breeding programs in crops, with enhanced resistance to pests and pathogens. GE does not require crossings, hence avoiding the introduction of undesirable traits through linkage in elite varieties, speeding up the whole breeding process. Additionally, GE technologies can improve plant protection by directly targeting plant susceptibility ( S ) genes or virulence factors of pests and pathogens, either through the direct edition of the pest genome or by adding the GE machinery to the plant genome or to microorganisms functioning as biocontrol agents (BCAs). Over the years, GE technology has been continuously evolving and more so with the development of CRISPR/Cas. Here we review the latest advancements of GE to improve plant protection, focusing on CRISPR/Cas-based genome edition of crops and pests and pathogens. We discuss how other technologies, such as host-induced gene silencing (HIGS) and the use of BCAs could benefit from CRISPR/Cas to accelerate the development of green strategies to promote a sustainable agriculture in the future.