CRISPR and Genomics Race to Save the World’s Vegetables From Climate Chaos

Vegetable crops are quietly collapsing under the weight of a warming world, and a new commentary published in Discover Plants argues that only a full-scale fusion of biotechnology and conventional breeding can reverse the decline. Writing in the open-access journal, Srija Priyadarsini of Odisha University of Agriculture and Technology, Saurabh Singh of Rani Lakshmi Bai Central Agricultural University, Alok Nandi of Siksha ‘O’ Anusandhan University, and Ferdinando Branca of the University of Catania lay out a detailed technical case for why genomics, genome editing, and plant tissue culture must now be treated as the central pillars of sustainable vegetable breeding rather than optional add-ons.

The numbers they cite are stark. Between 1965 and 2016, global vegetable production fell by 41 percent as a consequence of global warming, a decline that has largely escaped public attention even as staple cereal crops dominate headlines. Heat stress alone has been reported to cut yields by up to 35 percent in potato, 93 percent in sweet pepper, and a staggering 98 percent in tomato. Because climate change alters plant growth, physiology, reproductive ability, and produce quality simultaneously, the authors contend that breeding goals are shifting faster than traditional phenotypic selection can respond. The traits that matter most for sustainability, including drought and heat tolerance during vegetative and reproductive stages, resistance to rapidly evolving pathogens, reduced dependence on synthetic inputs, and extended shelf life to curb postharvest waste, are precisely the complex polygenic and environmentally plastic characteristics that conventional breeding handles poorly.

The authors also emphasize diversification. Global food systems remain dominated by wheat, rice, maize, and potatoes, while vegetable crops, which contribute substantially to nutritional security, receive far less breeding investment. Underutilized species such as zombi pea, amaranth, Dolichos bean, minor cucurbits, leafy vegetables, and tuber crops may harbour genes for tolerance of current environmental constraints, offering both new crop options and a broader genetic base that reduces dependence on a handful of climate-sensitive staples. Unlocking that potential, they argue, requires the modern biotechnological toolkit: genomics, marker-assisted breeding, genomics-assisted breeding, genotyping-by-sequencing, marker-assisted recurrent selection, CRISPR/Cas genome editing, and antisense RNA technology.

The genomics revolution began in earnest for vegetables in 2009, when cucumber became the first vegetable crop to have its genome sequenced. Since then, cost-effective sequencing platforms, high-quality reference genomes, and pangenome assemblies have dramatically shortened breeding cycles by enabling rapid gene discovery, high-resolution trait mapping, and genomics-assisted selection. Genome-wide association studies have been instrumental in dissecting complex traits. In one recent example highlighted in the commentary, researchers compared the genomes of cultivated spinach and its wild relatives Spinacia turkestanica and Spinacia tetrandra, identifying candidate genes associated with twenty important agronomic traits and detecting 996 selective sweeps, genomic regions strongly shaped during domestication and improvement, including regions governing leaf texture.

Classic examples illustrate how genomic knowledge translates into breeding power. The fw2.2 quantitative trait locus, a major determinant of fruit weight that played a pivotal role in tomato domestication, demonstrated that a large share of phenotypic variation in agriculturally important traits can be traced to specific genomic regions. QTL-seq analysis in bottle gourd identified seven QTLs associated with heat tolerance, while in cucumber a major QTL, qHT1.1, on chromosome 1 was pinpointed as governing heat stress tolerance. In cabbage, high-resolution mapping of QTLs for head shape, size, plant height, and marketable yield has supported the development of cultivars with stable performance across diverse environments. Pangenome analyses of cole vegetables, spanning cabbage, cauliflower, kale, knolkhol, broccoli, and Brussels sprout, have uncovered structural genomic variations underlying their remarkable morphological diversity, giving breeders new targets for widening the crop’s genetic base.

Some of the most commercially consequential genomic discoveries involve plant architecture genes. The self-pruning (sp) gene in tomato converts indeterminate growth into compact determinate plants with synchronized flowering and fruit maturity, promoting uniform ripening and enabling mechanical harvest of a large proportion of fruits at once. The jointless (j-2) gene eliminates the fruit pedicel abscission joint, producing fruits better suited to mechanical harvesting and processing. Together, these traits have improved harvesting efficiency and the consistency of raw material for the processing industry. Genomic analysis has even resolved questions dating to the origins of genetics itself, with recent studies unraveling the molecular basis of seven classical Mendelian traits in garden pea, insights the authors say provide a strong foundation for translating genetic knowledge into practical breeding outcomes.

Plant tissue culture, often overshadowed by gene editing, remains a critical bridge between conventional breeding and genome-based improvement. Techniques such as embryo rescue, micropropagation, doubled haploidy, somatic hybridization, in vitro selection, and germplasm conservation all accelerate the breeding pipeline. Doubled haploid technology, standardized through androgenesis and gynogenesis protocols, does more than produce homozygous lines; it substantially reduces the time required to fix desirable alleles and establish genetically stable breeding resources that can serve as mapping populations and heterosis breeding parents. Somatic hybridization has enabled the transfer of otherwise difficult-to-introgress traits and cytoplasmic backgrounds from wild relatives, including sterile cytoplasms used to generate cytoplasmic male sterile lines in cultivated Brassica oleracea. The commentary highlights a striking recent integration of tissue culture with genome engineering: a one-step system for creating CMS lines in Brassica oleracea using a CRISPR/Cas9-engineered BoCENH3-based in vivo paternal haploid induction system, which substantially compresses breeding cycles compared with years of repeated backcrossing.

CRISPR/Cas9, since its 2012 debut, has rewritten the rules of vegetable improvement. More specific, efficient, and simpler than earlier tools such as TALENs and zinc finger nucleases, the CRISPR/Cas system supports multiplex targeting of multiple genes. The first genome editing demonstration in a vegetable came in tomato, where the leaf development gene ARGONAUTE7 (SlAGO7) was targeted, while cabbage was among the first genome-edited vegetables developed for food applications. The practical successes now span stress tolerance, quality, and disease resistance. Knocking out the SlMlo1 gene conferred powdery mildew resistance in tomato; disrupting the eIF4E gene in cucumber produced resistance to cucumber vein yellowing virus and zucchini yellow mosaic virus; knockout of the SmelPPO1-10 gene blocked enzymatic browning in brinjal; and targeted edits of the CCD8 and StALS1 genes conferred herbicide resistance in tomato and potato respectively. In pumpkin, knockout of the RBOHD gene conferred salt tolerance, while GBSSI knockout in sweet potato altered amylose and amylopectin content.

Genome editing is also transforming hybrid breeding, which depends on male sterile lines that are traditionally maintained through laborious, multi-generation backcrossing that risks introducing undesirable linked genomic regions, so-called linkage drag. CRISPR/Cas9 and mitoTALEN editing have enabled rapid generation of ideal male sterile lines, for example in tomato by targeting the stamen-specific genes SlSTR1 and SlAMS. The commercial frontier is already open: Japan approved the first genome-edited vegetable cultivar, the tomato ‘Sicilian Rouge High GABA’, developed by targeting the GAD2 and GAD3 genes to elevate GABA content. Yet the authors caution that resistance traits may face durability problems as new pathogen races evolve under a changing climate, and that a critical gap persists between successful gene edits under experimental conditions and commercially deployable cultivars.

Regulation remains a decisive variable. Genome editing outcomes are classified by whether foreign DNA is present: SDN-1 edits leave no foreign DNA, SDN-2 edits introduce specific nucleotide substitutions without exogenous DNA, and SDN-3 edits insert new or foreign sequences. In 2022, India’s Ministry of Environment, Forest and Climate Change exempted SDN-1 and SDN-2 plants from regulation as transgenic products, opening the door to open-field testing, while SDN-3 products remain regulated under the 1989 Rules alongside transgenics. The regulatory landscape worldwide remains inconsistent, and the authors argue that harmonized rules, public awareness, equitable access, and farmer participation in trait prioritization and multilocation evaluation are essential for large-scale adoption. Their concluding prescription is pointed: the bottleneck is no longer a lack of genetic variation but the capacity to convert genomic knowledge into resilient cultivars quickly. Future progress, they propose, should focus less on isolated proof-of-concept discoveries and more on validated, transferable, breeder-ready genomic resources integrated into practical cultivar development, with genome editing viewed as a complement to, not a replacement for, conventional breeding.

Subject of Research: Application of plant biotechnology, including genomics and CRISPR genome editing, to sustainable vegetable breeding under climate change

Article Title: Plant biotechnology helps sustainable vegetable breeding

Article References: Priyadarsini, S., Singh, S., Nandi, A., & Branca, F. (2026). Plant biotechnology helps sustainable vegetable breeding. Discover Plants, 3(1), Article 441. https://doi.org/10.1007/s44372-026-00919-z

Image Credits: AI Generated

DOI: 10.1007/s44372-026-00919-z

Keywords: plant biotechnology, vegetable breeding, CRISPR, genome editing, genomics, climate resilience, food security, sustainable agriculture, doubled haploidy, male sterility, tomato, Brassica