Research Article Yield and quality of strawberry hybrids under subtropical conditions

Abstract

Strawberry (Fragaria x ananassa) stands out among small fruits as the most planted in Brazil, generating considerable income and employment. However, producers are dependent on cultivars originating from international breeding programs and imported seedlings. This entails high costs and plants poorly adapted to the edaphoclimatic conditions of Brazil. In addition, the consumer market demands superior organoleptic and nutritional qualities. We assessed the potential of 194 hybrids for production and physicochemical characteristics from a population of seedlings obtained from intraspecific crosses of the short-day cultivars Dover, Camarosa, Sweet Charlie, Oso Grande, Milsei Tudla, and Festival Florida and the day-neutral cultivar Aromas. The experimental design was an augmented block design that had as control treatments the cultivars Camarosa and Camino Real. Five production and nine physicochemical characteristics were assessed. The mean comparison was performed by the Dunnett test. Among the 14 characteristics analyzed, eight presented significance. The significant production characteristics were the number of commercial fruits, mass of commercial fruits, mass of non-commercial fruits, and the total mass ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 18 (2): gmr18156 E. Barth et al. 2 of fruits, with values of 45.03 fruits/plant, 13.17 g, 72.22 g/plant, and 720.77 g/plant, respectively. The physicochemical characteristics that varied significantly were soluble solids to titratable acidity ratio, pectin, ascorbic acid, and anthocyanin, which presented values of 10.23, 2.06 g total pectin/100 g pulp, 71.12 mg ascorbic acid/100 g pulp, and 39.51 mg cyanidin 3-glycoside/100 g pulp, respectively. The crosses that involved Camarosa and Aromas gave a greater number of hybrids with superior positive effects when compared to the controls in terms of production and physicochemical characteristics, respectively. Among the 194 hybrids, 30 were superior to the controls and were selected to advance in the breeding program.

Vernalizing Pre-Transplants Improved the Agronomic Characteristics of Strawberry Genotypes Under Tropical Conditions1

“…They, in turn, produced significantly greater yields than Dover × Rosalinda 4 , IAC Guaraní, Dover × Esplendida, Early Bright, Dover × Aichi, Sweet Charlie, and Corea with means of between 196.69 and 105.20 g plant -1 (Table 1). Barth et al (2019) has suggested that crosses among the current commercial cultivars could potentially be used to exploit variability as they already contain favorable alleles. In this study, the crosses in which the female genitor was Dover and the male genitor was Rosalinda or Esplendida produced the best results.…”

Strawberry genotypes with resistance to Tetranychus urticae mediated by leaf trichomes

“…Genotypes selected based on agronomic and postharvest characteristics at both locations were used to design the composition of treatments. The preselected strawberry hybrids used in the trial, RVFS#07 (Festival Florida x Sweet Charlie), RVDA#16 (Camarosa x Aromas) and RVCS#44 (Camarosa x Sweet Charlie), came from the UNICENTRO/UEL/UFLA breeding program (Galvão et al, 2017;Barth et al, 2019;Barth et al, 2020), maintained at the Germplasm Bank of UEL/UNICENTRO. In addition to the hybrids, the commercial cultivars Camarosa, Camino Real (short photoperiod cultivars), Albion, and Monterey (neutral photoperiod cultivars) served as check treatments.…”

“…The hybrids significantly affected the walking and oviposition of the spider mite, showing that for the goal of achieving resistance to the mite, the use of these hybrids as future cultivars can be considered. Taking that into consideration, they were selected because of showing excellent productive and postharvest performance (Galvão et al, 2017;Barth et al, 2019;Barth et al, 2020). Nevertheless, it is necessary to recommend the continuation of the breeding program, considering that these hybrids can be used as parents in future generations.…”

Multivariate analysis methods improve the selection of strawberry genotypes with low cold requirement

“…However, single trait selection may result in cultivars that do not adequately meet the demands of producers and consumers 10 . Combining direct and indirect effects can better evince the importance of traits on an independent variable, such as production of commercial fruits 11 , 12 . Using the path analysis to seek a better understanding of cause and effect, along with multivariate techniques, such as selection indices, to simultaneously evaluate multiple traits may be the best strategy for obtaining genotypes that balance agronomic, biometric, and biochemical characteristics, especially in the early stages of a breeding program 10 , 13 , 14 .…”