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Universitat Politècnica de València (2021)

Evaluación de retrocruces avanzados de berenjena en condiciones de bajo nitrógeno

Moya Muñoz, Reyes David

Titre : Evaluación de retrocruces avanzados de berenjena en condiciones de bajo nitrógeno

Auteur : Moya Muñoz, Reyes David

Université de soutenance : Universitat Politècnica de València

Grade : Máster Universitario en Mejora Genética Vegetal 2021

Résumé
Aubergine (Solanum melongena) is a very important vegetable in many tropical and subtropical areas of the world, being the third most produced solanaceae worldwide. However, genetic resources and biotechnological tools for its study have not been sufficiently developed. On the other hand, N input in agriculture has a significant environmental cost, making it necessary to adapt the cultivation system towards a low-input system. Aubergine is vulnerable to these changes due to the genetic bottleneck effects that occurred during its domestication and the limited availability of available genetic resources for breeding. With the aim of creating pre-breeding material that can be used to increase phenotypic diversity in future breeding programmes, García-Fortea and collaborators (2020) are developing at COMAV three introgression lines (ILs) with material from three species representing the different groups of the aubergine gene pool S. insanum, S. dasyphyllum, and S. elaeagnifolium. In this Master’s thesis, a total of 143 ILs were selected from this collection and evaluated under low nitrogen conditions and compared with the recurrent parents. Significant effects of high and low nitrogen growing conditions were observed in the recurrent parents. Among the lines, a large variability was observed and significant differences were found for some agronomically important traits such as fruit weight, or in nitrogen utilization efficiency (NUtE) in some of the ILs evaluated, and genotypes with higher agronomic characteristics to those shown by the parents were also found. The evaluation of these materials may contribute to the development of new improved aubergine varieties for a more sustainable agriculture

Mots Clés  : Líneas de introgresión , Locus de rasgo cuantitativo (QTL) , Berenjena , Solanum melongena , Nitrógeno , Fenotipado , Introgression lines (ILs) , Phenotyping , Nitrogen , Eggplant , Quantitative Trait Locus (QTL)

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Page publiée le 19 décembre 2021