Abstract
The average yield of sweet potato (Ipomoea batatas (L.) Lam.) in Brazil is below the crop potential, and appropriate cultural practices and more productive cultivars are needed to improve crop yield. The Beauregard sweet potato cultivar, originally from the United States, has shown high productive potential. This study evaluated the performance of features of agronomic importance of the Beauregard cultivar in comparison to local cultivars and eight sweet-potato clones in Brazilian regions. For that purpose, two sets of experiments were carried out. The first set evaluated eight sweet potato clones and cultivars Beauregard, Olho Roxo and Ourinhos in Brasília–DF and Itabaiana–SE using as criteria two foliage and six root traits. In the second set, two sweet potato clones (9 and 75), and Beauregard, Brazlândia Branca and Canadense cultivars were evaluated in Piacatú–SP, Brasília–DF, PAD–DF, Canoinhas–SC and Altamira–PA, for the traits: commercial, non-commercial, and total yield. Beauregard presented little foliage production but great root yield across the different environments. Since it has low dry matter content, acceptance of this cultivar may be limited in some regions. None of the sweet potato clones showed stable yield to justify a commercial launch.
Highlights
Sweet potato (Ipomoea batatas (L.) Lam.) is the fourth most cultivated vegetable in Brazil with 49,554 ha of cropped area and total production of 805,412 tons in 2019 (IBGE, 2021)
The average yield of sweet potato (Ipomoea batatas (L.) Lam.) in Brazil is below the crop potential, and appropriate cultural practices and more productive cultivars are needed to improve crop yield
This study evaluated the performance of features of agronomic importance of the Beauregard cultivar in comparison to local cultivars and eight sweet-potato clones in Brazilian regions
Summary
Sweet potato (Ipomoea batatas (L.) Lam.) is the fourth most cultivated vegetable in Brazil with 49,554 ha of cropped area and total production of 805,412 tons in 2019 (IBGE, 2021). The average yield of Brazilian sweet potato in Brazil is roughly 14 t ha–1, below the crop potential that can reach above 40 t ha–1. In Brazil, 32 cultivars of sweet potato have been registered to the Ministry of Agriculture, Livestock and Food Supply (MAPA, 2021); local and non-improved varieties prevail in the crop, which accounts for low yields (Cecílio Filho et al, 2016; Vargas et al, 2018). This study assessed the performance of the Beauregard cultivar in Brazilian regions in comparison to local cultivars and we investigated the yield potential of new sweet potato clones
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