Abstract
ABSTRACT The identification of genotypes with greater capacity for flowering and seed production is crucial for greater efficiency in the genetic improvement of the sweet potato crop. Thus, the objective of this work was to evaluate the flowering capacity and the production of botanical seeds in sweet potato genotypes. The work was carried out in the municipality of Lavras, located in the southern region of Minas Gerais, Brazil. Twenty-two sweet potato genotypes belonging to the germplasm bank of the Federal University of Lavras (UFLA) were evaluated. The characteristics evaluated were the flowering period (days), the number of viable seeds, the total weight of viable seeds, the weight of 1000 seeds and the percentage of germination. The obtained data were analyzed by means of descriptive statistics, study of correlations and analysis of main components. The sweet potato genotypes evaluated showed a high capacity for flowering and production of botanical seeds. Flowering usually starts 125 days after planting and extends on average for 72 days. Considering future recombination to promote flowering capacity, seed production and greater germination, genotypes BD-05, BD-26 and BD-44 should be prioritized.
Highlights
A identificação de genótipos com maior capacidade de florescimento e produção de sementes é determinante para maior eficiência do melhoramento genético da cultura da batata-doce
Considerando futuras recombinações para promoção da capacidade de florescimento, produção de sementes e maior germinação, devem ser priorizados os genótipos BD-05, BD-26 e BD-44
Knowledge of this characteristic is essential for the genetic breeding of the crop, because of this high level of ploidy and cross-fertilization, each obtained seed can be a new clone with great agronomic potential (TorquatoTavares et al, 2017)
Summary
A identificação de genótipos com maior capacidade de florescimento e produção de sementes é determinante para maior eficiência do melhoramento genético da cultura da batata-doce. O objetivo deste trabalho foi avaliar a capacidade de florescimento e a produção de sementes botânicas em genótipos de batata-doce. Os genótipos de batata-doce avaliados apresentaram elevada capacidade de florescimento e de produção de sementes botânicas. It is worth noting that the flowering of sweet potato does not occur in all regions, as it requires specific climatic conditions that vary according to the genotype (Gurmu et al, 2013), Horticultura Brasileira 39 (4) October - December, 2021 which makes it difficult to recombine these in certain places External factors such as photoperiod, temperature and humidity can affect flowering and seed production, restricting the installation of genetic breeding programs for this vegetable in some regions of Brazil. Despite the importance of knowledge about flourishing capacity and seed production in the genetic breeding of sweet potato, studies that are dedicated to the evaluation of these characteristics in the crop are rare
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