Evaluation of six raspberry cultivars in a temperate climate zone of central Chile

E. Contreras, J. Grez, S. Sánchez, M. Gambardella
In Chile, raspberry is grown mainly between parallels of 34°50’ and 37°28’S, and production is mostly intended for the individual quick freezing (IQF) frozen fruit export market. The growing commercial interest in this fruit crop has favored the incorporation of new cultivation zones. In this context, the central coastal zone of Chile, which has a temperate climate with maritime influence, it could be incorporated into the raspberries production. In this case, mainly destined to the fresh fruit production. Highly primocane flowering cultivars can be produced in this type of climate, but it is necessary to assess their performance and establish the best growing systems. In this regard, six primocane cultivars were evaluated in Santo Domingo (33°38’S) under two growing conditions: in the open field and in tunnels. The cultivars evaluated were ‘Santa Catalina’, ‘Santa Clara’, ‘Santa Teresa’, ‘Heritage’, ‘Dolomia’ and ‘Lagorai’. Height, floral differentiation, production plant‑1, and fruit quality parameters were evaluated. In the middle of the season, floral differentiation was already observed in all the cultivars, except for ‘Heritage’ and ‘Lagorai’, whose differentiation started two weeks later. This late differentiation was reflected in fruit production, since this trait showed very low values in both cultivars. On the other hand, ‘Santa Catalina’ and ‘Santa Teresa’ were the cultivars with the highest yields (1.87 and 1.89 kg m‑2, respectively), while ‘Santa Teresa’ and ‘Dolomia’ presented the biggest fruit sizes (6.0 and 5.9 g, respectively). Overall, the results indicate that cultivars classified as highly remontant and remontant, i.e., ‘Santa Teresa’, ‘Santa Catalina’, ‘Santa Clara’ and ‘Dolomia’, adapted to the temperate zone in ‘Santo Domingo’, reaching yields greater than 1 kg plant‑1. There were no significant yield differences between plants grown under protected and open-air growing conditions, although no off-season cultivation was considered in the trial.
Contreras, E., Grez, J., Sánchez, S. and Gambardella, M. (2020). Evaluation of six raspberry cultivars in a temperate climate zone of central Chile. Acta Hortic. 1277, 129-134
DOI: 10.17660/ActaHortic.2020.1277.18
flowering, production, primocane

Acta Horticulturae