Phenotypic characterization of a flower mutation in the grapevine cultivar Listán Prieto and its effects on productivity

OROÑO, TOMAS; MUÑOZ, CLAUDIO; LOPEZ, MARTIN; GOMEZ-TALQUENCA, SEBASTIAN; TORRES, ROCIO; LIJAVETZKY, DIEGO; CALDERÓN, LUCIANO

Rosario

Conferencia; XXXIV Argentinian Meeting of Plant Physiology; 2023

Sociedad Argentina de Fisiologia Vegetal

The first hermaphrodite flowers appeared in grapevine (Vitis vinifera L.) because of the domestication process. This is a main characteristic of cultivated grapevines differing from their wild dioecious ancestors. Due to the predominant presence of masculinized flowers, accession Criolla Chica Nº2 (CCN2) is catalogued as a flower mutation of Criolla Chica (Argentinian synonym for cv. Listán Prieto -LP-). As the initial step of the molecular characterization of CCN2 mutant, the present study aimed to analyze the impact of the mutation on different reproductive and berry-related traits. The evaluated traits were fertility, yield, biochemical berries composition, seeds number and morphology. As control genotype we analyzed the accession Criolla Chica “Ballista”, with hermaphrodite flowers. Both LP genotypes are planted in the same vineyard, at the “Colección de Uvas Criollas” (EEA INTA-Mendoza). The mutant CCN2 presented abscission of most inflorescences (averaging 65%), due to a strong fruit-set reduction. This phenomenon was not observed in CCBA. Regarding yield components (clusters/plant, berries/cluster, berry weight and seeds/berry), CCN2 exhibited lower values than CCBA (p