Evaluation of production and quality traits in interspecific hybrids of ornamental pepper

Abstract

The cultivation of potted peppers as ornamental plants has increased considerably throughout the planet. In Brazil, this crop is more recent and still lacks cultivars. In order to increase the available variability and obtain new cultivars, the interspecific hybridization is very useful in add a desirable attribute that occurs in one species to another species, resulting in a new cultivar of agronomic interest. The objective of this study was to characterize parents and interspecific hybrids based on 27 quantitative traits and evaluate their genetic diversity by multivariate procedures. Parents of seven pepper genotypes were crossed, and, seven hybrids were generated. The experiment was conducted in a completely randomized design. Data were subjected to analysis of variance, and means were subsequently grouped by Scott-Knott’s method. Tocher’s method was utilized based on Mahalanobis distance, and the relative importance was evaluated by Singh’s method. The effects of treatment were significant by F test at 1 and 5% probability for all studied traits, except for anther length and titratable acidity. According to Scott-Knott’s test, the genotypes were grouped into two to eight classes. By Tocher’s method, the genotypes were separated into four groups. The first three canonical variables explained 92.02% of the total variance. By Singh method, fruit yield per plant was the trait that most contributed to the divergence explaining 21% of the total variance. The studied parents and hybrids diverged for the evaluated traits; however, there was difficulty in obtaining good interspecific hybrids with traits of importance, wherein combinations HS1×L7, L2×L6, and HS1×L2 met these requirements.

Selection Among Segregating Pepper Progenies With Ornamental Potential Using Multivariate Analyses

“…Of the studied traits, the ones that most contributed to genetic divergence among the evaluated progenies were leaf length (11.1%), pedicel length (9.1%), largest fruit diameter (8.3%), placenta length (7.8%), plant height (7.1%), number of fruits (6.6%), and first bifurcation height (6.4%) (Figure 1). These results can assist in the selection of superior progenies and genotypes, attributing importance to the referred traits in the selection of ornamental peppers (NASCIMENTO et al, 2019). These traits that showed the greatest contributions demonstrated that, even in F2:3, there is still much variability, and these traits should be considered for discriminating between the progenies.…”

“…), and also as ornamental plants (RÊGO; RÊGO, 2016;. Furthermore, peppers are autogamous species easily propagated by seeds, with short vegetative phases and high aesthetical value (RÊGO et al, 2012;RÊGO;RÊGO, 2018;NASCIMENTO et al, 2019).…”

“…In order to obtain new and superior pepper strains, it is necessary to perform selection during successive self-fertilization cycles in segregating populations (MESQUITA et al, 2016;PESSOA et al, 2019). Variability studies with ornamental peppers are based on plant, flower, and fruit traits, evaluating qualitative and quantitative data (BARROSO et al, 2012;SILVA NETO et al, 2014;COSTA et al, 2016;LIMA et al, 2019;FORTUNATO et al, 2019;PESSOA et al, 2019;NASCIMENTO et al, 2019). Through morphological characterization, it is possible to assess the genetic divergence of a set of available genotypes for use in genetic improvement programs (ELIAS et al, 2007).…”

Genetic Variation Based on RAPD Profiling and Production Loss of Cayenne Pepper due to Periodic Flooding

“…Knowledge of genetic diversity provides valuable information for germplasm resources management required in breeding programs [49], [50]. Crossbreed over species is needed to expand genetic diversity [1], [51] and to promote better production and improve resistance to biotic and abiotic stress [52].…”

Selection in segregating populations of ornamental pepper plants (Capsicum annuum L.) using multidimensional scaling

“…The Federal University of Paraíba (UFPB) has developed in the last few years an improvement program for ornamental pepper plants whose purpose is the development of new varieties, based mostly on hybridization, generating segregating populations and allowing for the improvers to select superior genotypes, with desirable characteristics for in-pot cultivation (Silva Neto et al, 2014;Rêgo et al, 2015a;Mesquita et al, 2016;Lima et al, 2019;Fortunato et al, 2019;Nascimento et al, 2019;Pessoa et al, 2019). In this perspective, the study of the genetic diversity among genotypes in segregating Rev.…”