The understanding of the adaptation of sweet potato genotypesto environmentsand the efficiency of its production process in diversegrowingsystems are essential for best performance genotypes to be known. Thus, the aim of this study wasto evaluate sweet potato genotypesforroot production and quality attributes in two cropping seasons in Brasília-DF, Brazil. Nine genotypesn wereevaluated: BRS Amélia, Beauregard, Brazlândia Branca, Brazlândia Rosada, Brazlândia Roxa, BRS Cuia, Princesa,BRS Rubissoland a local controlwere grownin a complete randomized blocksdesign with four replications.Characteristics related to root yield, quality and pest( insects) damagewere evaluated. The genotypeBrazlândia Rosada stands out in relation to root yield (66.03 tha-1and 31.58 t ha-1for first and second experiments, respectively) and also presented a good rootshape index(2.00). There is no great genetic variability among genotypesfor insect damage index, with genotypesBRS Amelia and BRS Cuiapreseting less desirable shapecharacteristics.No genetic variability was found among genotypesfor insect damage. GenotypesBRS Amélia and BRS Cuia presented the least desired root shapeindex.Under the conditions of this study regarding the characters evaluated, genotype Brazlândia Rosada presented superior results in terms of roots production and shape index.

The root-knot nematode (RKN) Meloidogyne enterolobii is gaining importance all around the world, including Brazil, damaging sweetpotato genotypes with known resistance to other RKN species, making it challenging to generate new resistant genes. This study aimed to assess the levels of resistance of 10 advanced sweetpotato cultivars to this nematode species. Two experiments were carried out in 2018/2019 and 2021/2022 seasons, under greenhouse conditions in Brasília-DF, Brazil. A completely randomized block design with six replicates of one plant/plot/treatment was used. The gall index (GI) and egg mass index (EMI) in the root system of each plant, the number of eggs and juveniles per gram of root with galls (NERG), and the nematode reproduction factor (RF) were determined. M. enterolobii resistance is present within three of the evaluated clones: BGBD 1399, MD 1609024, and MD 1610036, therefore demonstrating their potential as sources of resistance genes to assist breeding efforts to release cultivars, and help to reduce the impact and spread of this RKN.

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