Yield and postharvest greening of potato cultivars tubers produced in winter cropping season

Abstract

Potato cultivars with good production performance and with resistance to greening are of great economic importance to the productive sector. This study aimed to evaluate yield, classification, protein content and resistance to postharvest greening of potato tubers of different cultivars. The experiment was carried out during the winter cropping season of 2008 in Itaí, São Paulo State, Brazil. The experimental design was the completely randomized block with four replications. Treatments consisted of five potato cultivars (Ágata, Asterix, Atlantic, Markies and Mondial). Yield, classification by diameter, weight, protein content and greening of tubers were evaluated. Mondial, Asterix and Ágata cultivars showed higher total and commercial tuber yield. Mondial showed higher yield of large tubers. Atlantic showed lower tuber yield, with high percentage of commercial tubers. Markies, Atlantic and Asterix cultivars showed higher protein content of tubers. Markies showed lower susceptibility to the greening in the initial stage of storage. Asterix showed higher intensity of greening in the tubers.