Variation in responses to N limitation in Solanum lycopersicum var. cerasiforme and S. pimpinellifolium accessions and hybrids reveals genetic potential for improving nitrogen use efficiency (NUE) in tomato breeding
[EN] Enhancing nitrogen use efficiency (NUE) is critical in reducing the environmental footprint of agriculture. Wild relatives represent valuable underexploited genetic resources for improving NUE and ensuring sustainable tomato (Solanum lycopersicum L.) production in response to global demand. Thi...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/226690 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/226690 |
| Access Level: | acceso abierto |
| Palabra clave: | Tomato Breeding NUE Partition Uptake Nitrogen Yield Low-input agriculture |
| Sumario: | [EN] Enhancing nitrogen use efficiency (NUE) is critical in reducing the environmental footprint of agriculture. Wild relatives represent valuable underexploited genetic resources for improving NUE and ensuring sustainable tomato (Solanum lycopersicum L.) production in response to global demand. This study presents an integrative physiological and transcriptomic analysis of four genetically and geographically diverse accessions of S. lycopersicum var. cerasiforme (SLC) and S. pimpinellifolium (SP), along with four interspecific F1 hybrids grown under optimal and sub-optimal N supply levels. These materials were evaluated for their long-term responses, and specific adaptations to N limitation were identified across materials. Specifically, SLC3 displayed high NUE under sub-optimal N supply, primarily due to efficient N partitioning to the fruit, and transcriptional activation of genes associated with photosynthesis and responses to light. Furthermore, SP1 and SP3 accessions presented the highest N uptake efficiency across both N levels, likely linked to differential regulation of genes related to amino acid transport in SP1 and root cell wall growth responses in SP3. Transcriptomic analyses revealed distinct sets of root- and leaf-expressed genes among accessions regulated in response to N availability. Specific combinations of genes involved in N transport, like NPF, NRT2, and amino acid permease families, and C/N metabolism were identified. These results emphasize the potential of SLC and SP accessions as sources of NUE-related alleles, highlighting that their successful incorporation as founders in multiparent MAGIC populations could accelerate breeding for high-yielding, N-efficient tomato cultivars. |
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