The National Institute of Agricultural Technology (INTA) has developed nine varieties of seedless table grapes. These varieties have already been registered in Argentina's National Register of Cultivars and, according to the agency, they have outstanding quality and productivity.
Silvia Ulanovsky, a specialist in genetic improvement at INTA in the province of Mendoza (west), said that all table grape varieties obtained through genetic improvement techniques are stenospermocarpic, which means they produce soft rudiments that are almost imperceptible instead of normal hard seeds. This is important as it is a trait that consumers prefer.
According to INTA, the new varieties are easy to handle, can be kept cold after harvest and their berries have a minimum size of 18 millimeters without the need to resort to growth regulators.
Three of the nine new varieties have white berries (Esperanza INTA, Resistencia INTA, and Grandeza INTA), another three have black berries (Fernandina INTA, Revelación INTA, and Surprise INTA), two are red (Serena INTA and Marisela INTA), and the remaining one is pink.
The latter is called Delicia INTA and has a Moscatel flavor. It is one of the stars of the new varieties because, according to researchers, it's better than the traditional Moscatel Rosado variety that is grown in Argentina and other Latin American countries because it is seedless and its pollen has greater fertility.
"The cultivation of Delicia INTA in cool areas favors obtaining grapes of intense color, which is difficult to achieve in pink and red grapes in warmer areas," Ulanovsky stated.
The researcher also highlighted the long process involved in genetic improvement. "Obtaining a variety requires a minimum of 15 years, plus considerable human resources for the work carried out in laboratories, greenhouses, and in the field," she said.