Adaptabilidade e estabilidade de genótipos de batata com polpa roxa

Abstract

Anthocyanins found in purple-flesh potatoes have been shown to possess strong antioxidant activities with potential to neutralize free radicals and thus provide several health benefits. This work aimed to evaluate the adaptability and stability of purple-fleshed potato genotypes to different crop years and Brazilian regions. The experiments were carried out in Canoinhas-SC, Pelotas-RS, Brasília-DF and Cristalina-GO, Brazil. Two advanced clones with purple flesh, C2743-01-09 and C2743-09-09, plus two control cultivars with known frying quality, Atlantic (chips) and Asterix (french fries), were evaluated. A randomized complete block design with three replications of two rows of 25 plants, was used. Joint analysis of variance, grouping of means by the Scott-Knott test at 5% probability, and adaptability and stability analysis by the WAASB method revealed high yield potential of the clone C2743-09-09 and frying quality superior to Asterix, but inferior to Atlantic, and plants with an early vegetative cycle and moderate vigor. The clone C2743-01-09, on the other hand, produces a large amount of tubers, but low yield of commercial tubers, due to low average tuber mass, because its plants shows a very short cycle and low vigor.