Soluble solids monitored in the clusters in minitomato hybrids from dwarf lines

Abstract

On minitomatoes, the soluble solids content (SSC) is a fundamental characteristic for commercialization. Therefore, is essential to evaluate the genetic diversity among the genotypes, looking their SSC and also the SSC variation, related to the position of the cluster, mainly due to the new technologies – tomato hybrids obtained from dwarf lines. In this sense, the objective of the experiment was to evaluate the genetic variability and the influence of the cluster’s position on the SSC, in minitomato genotypes that were obtained from dwarf lines. The experiment were conducted on a greenhouse and set up in a completely randomized design, with subdivided portion of 13 hybrids x 5 cluster’s position and four replications. The SSC of the fruits were evaluated according with their position of the clusters, being the values expressed in 0Brix. The genetic diversity was obtained by multivariate analyzes, using the generalized distance of Mahalanobis, utilizing different grouping methods (UPGMA and Tocher). The hybrids performance for SSC was checked by the Scott-Knott test (p=0.005). The cluster’s position influenced on the SSC of the minitomatoes fruits and the first cluster of all hybrids that were evaluated, presented the highest SSC. Besides that, the highest 0Brix variability among the genotypes occurred when the fruits were harvested on the fifth and first cluster. Most hybrids originated from dwarf lines did not presented a reduce on 0Brix values during the harvests.

Agronomic potential and genetic dissimilarity among coffee cultivars: Hierarchical method and optimization

“…The use of multivariate techniques to estimate genetic dissimilarity has become common and is employed in several species; tomatoes (Maciel, et al, 2018;Finzi, et al, 2019), common bean (Correa & Gonçalves, 2012), pumpkin (Ferreira, et al, 2016), corn (Nardino, et al, 2017) and soybean (Almeida, Peluzio & Afférri, 2011), with little research on coffee germplasm evaluation. In this context the objective of the study was to evaluate the Research, Society and Development, v. 9, n. 9, e561997468, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i9.7468 genetic dissimilarity among coffee cultivars based on hierarchical and optimization methods in the Alto Paranaíba region, MG.…”