English

Sobreira Alexandre Rodrigo,Paulo Czepak Márcio,Tiemi Hassuda Dos Santos Karina,Augusto Teixeira Do Amaral José,Francisco Cattaneo Laercio,Antônio Ferreguetti Geraldo,Garcia Malikouski Renan,Schmildt Omar,De Lima Nascimento Alan,Lima Nascimento Adriel,Romais Schmildt Edilson

doi:10.5897/ajar2018.13165

Abstract

To augment a narrow genetic base in papaya, this study aimed to evaluate the performance of new hybrids produced by Caliman Agrícola® S.A. The experiment was carried out in a randomized complete block design, with 12 treatments four replications and ten plants per plot. The treatments were the variety THB and the hybrids were CR1 × São Mateus, CR1 × 72/12, CR2 × São Mateus, CR3 × São Mateus, CR1 × Maradol, CR2 × Sekati, CR3 × Maradol, CR1 × UENF/Caliman 01, CR3 × Sekati, CR1 × SSAM and Baixinho (dwarf) × Pecíolo Curto (short petiole). Ten hermaphroditic plants per plot were evaluated at 8 and 12 months after transplanting. Data were recorded for sixteen characteristics related to morphology of plants and biometry of fruits harvested at maturity stage II (fruit with up to 25% yellow skin). The analysis of variance and the subsequent Scott-Knott’s mean clustering test showed significant differences between cultivars for all the characteristics. The characteristic soluble solids grouped the variety THB and five medium-sized hybrids with potential for exploitation: CP1 × UENF/Caliman 01, Baixinho × Pecíolo Curto, CP1 × 72/12, CP1 × SSAM, and CP1 × São Mateus. The estimated average yield of marketable fruits in 12 months grouped the two hybrids with the highest averages: CP3 × Sekati and CP2 × Sekati. The analysis of the new hybrids revealed interesting productivity and fruit quality characteristics, suggesting that they should undergo value for cultivation and use (VCU) testing for future release as commercial hybrids. Key words: Carica papaya L., plant breeding, genetic variability.

Highlights

Papaya (Carica papaya L.) is one of the most important and widely distributed crops in tropical and subtropical countries
To augment a narrow genetic base in papaya, this study aimed to evaluate the performance of new hybrids produced by Caliman Agrícola® S.A
Data were recorded for sixteen characteristics related to morphology of plants and biometry of fruits harvested at maturity stage II

Summary

Introduction

Papaya (Carica papaya L.) is one of the most important and widely distributed crops in tropical and subtropical countries. A feasible approach for increasing the number of commercial varieties and hybrids is to expand the genetic base of papaya by exploiting the variability existing in germplasm banks (Quintal et al, 2012; Vivas et al, 2015; Silva et al, 2017) and creating new hybrids in breeding programs (Pereira et al, 2002). Efforts should be made to broaden the genetic base and develop cultivars that meet the requirements of domestic and foreign markets and are less susceptible to pests and diseases and more resistant to biotic and abiotic stresses (Vivas et al, 2012, 2014, 2015)

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