<![CDATA[Tomato is an important horticultural crop that is highly susceptible to heat stress. Heat stress can reduce the photosynthetic rate, pollen viability, fruit set, and fruit quality, while disrupting plant metabolism. This review aimed to examine the utilization of molecular markers and multi-omics approaches in identifying heat tolerance in tomato plants. The study employed a systematic review based on the PRISMA guidelines, analyzing 20 research articles retrieved from the Scopus and Google Scholar databases published between 2016 and 2026. The results showed that molecular markers such as SSR, RAPD, and SNP have been utilized to identify heat-tolerant genotypes. Transcriptomic approaches successfully identified several genes involved in heat stress responses, including CWINV2, HK2, SPS, SUT, SWEET, HsfA2, HsfA3, and Aox1a. Proteomic approaches revealed the accumulation of proteins involved in defense mechanisms against high temperatures, particularly Heat Shock Proteins (HSPs), Small Heat Shock Proteins (sHSPs), glutaredoxin, glutathione-disulfide reductase, and anti-apoptotic proteins, which contribute to maintaining protein homeostasis, redox balance, and pollen viability under heat stress conditions. The integration of molecular markers and multi-omics approaches provides a more comprehensive understanding of heat tolerance mechanisms in tomato and has the potential to improve the efficiency of developing heat-tolerant varieties through marker-assisted selection (MAS) and precision breeding. ]]>
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