The sugars content of parental and new perspective descendant strawberry genotypes potential approach for the future selection process

Abstract

Besides being one of the most commercially grown berry fruits, strawberries (Fragaria x annanassa Duch.) are known for their nutritional value, richness in polyphenols, and antioxidant capacity. New directions of strawberry breeding and selection are set towards premium fruit quality, high sugars content, and desirable sugars/total acids ratio (sweet index, SI), which represent some of the main prerequisites for selecting new breeding materials [1]. With this intention, a set of 24 strawberry genotypes was cultivated, including 12 parental varieties and 12 of their descendants - perspective candidates obtained by crossing the parental varieties mentioned above. A total of eleven sugars were quantified using High-Performance Anion-Exchange Chromatography with Pulsed Amperometric Detection (HPAEC-PAD). Results implied that glucose, sorbitol, sucrose, and melibiose content were the most important sugars in separating the fruits of parental varieties and their progeny [2]. Results showed that old, parental varieties had a significantly higher content of glucose and sucrose, while new perspective genotypes had higher sorbitol and melibiose content (Fig.2). PCA analysis confirmed that parental (samples 1-12) and descendant genotypes (samples 13-24), could be discriminated according to sugars profile i.e. that these four sugars have an effect on their differentiation (Fig.1). This was in accordance with Mann-Whitney U test results (Fig.2).Fig.1. Principal Component Analysis - The difference between parental and descendant genotypes; score plot (A) – parental samples (PS) 1-12, descendant (DS) samples 13-24, and loading plot (B) – sugar components.Acknowledgments: This work has been supported by the Ministry of Education, Science, Technological Development and Innovation of Republic of Serbia, Contract number: 451-03-47/2023-01/200168 and 451-03-47/2023-01/200288., as well as company “Zeleni hit d.o.o.” from Belgrade, Serbia and “BerryLab” breeding consortium from Italy.References:[1] L. Mazzoni, L. di Vittori, F. Balducci, T.Y. Forbes-Hernandez, F. Giamperi, M. Battino, B. Mezzeti, F. Capocasa, Scientia Horticulturae, 261: 108945 (2019).[2] M. Fotirić Akšić, T. Tosti, M. Sredojević, J. Milivojević, M. Meland, M. Natić, Plants, 8: 205 (2019).