Diallel mixed-model analysis of papaya fruit deformities

Cardoso, Deisy Lúcia; Vivas, Marcelo; Pinto, Fernanda Oliveira; Viana, Alexandre Pío; Pereira, Messias Gonzaga

doi:10.1590/0103-8478cr20151553

Cited by 7 publications

(6 citation statements)

References 8 publications

(4 reference statements)

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“…Resende (2016) highlights the efficacy of this procedure to model the heterogeneity of genetic variances, as well as to estimate genetic parameters, such as components of variance, heritability, correlation, and selection indices. In the improvement of fruit trees, especially perennials, this method enables researchers to obtain credible results quickly and efficiently, as observed for mango tree (Maia et al, 2017), papaya tree (Cardoso et al, 2017), as well as cupuassu tree (Alves et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

ESTIMATES OF GENETIC PARAMETERS AND SELECTION OF THREE-WAY CROSS CUPUAS-SU TREE PROGENIES (Theobroma grandiflorum)

Alves¹,

Chaves²,

Alves³

et al. 2021

FPBJ

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In fruit tree breeding programs there is a need for effective selection methods to develop and identify superior genotypes. Thus, this study aimed to estimate genetic parameters and select superior genotypes for a genotypic aggregate in three-way cross progeny of cupuassu tree. As such, 25 three-way cross progeny were evaluated using a randomized block design, with five repetitions and three plants per plot. The following variables were measured over eight harvests: average number of fruits per plant; average fruit production per plant (kg); and incidence rate of witches' broom disease. The mixed model methodology (REML/BLUP) was used to estimate the components of variance and predict the genetic and genotypic values. The Additive Index was used to select families, and within these families select potential clones and genitors. The results showed the existence of genetic variability between families. This allowed the selection of progenies 125, 117, 130, 165, 131, 127, and 143, which resulted in a 14.3% gain in productivity, maintaining extremely low levels of witches' broom. In each progeny, individuals were selected to be recommended to producers in the form of clones, after clonal tests, and others that could be used as parents in the genetic breeding program of cupuassu tree, aiming to obtain more genotypes that are productive and with greater durability of resistance to witches' broom, in the field.

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Section: Resultsmentioning

confidence: 99%

ESTIMATES OF GENETIC PARAMETERS AND SELECTION OF THREE-WAY CROSS CUPUAS-SU TREE PROGENIES (Theobroma grandiflorum)

Alves¹,

Chaves²,

Alves³

et al. 2021

FPBJ

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“…Considering that all phenological phases that make up the papaya development are essential for its productive success; however, the interval that includes the beginning of flowering and fruit harvest is largely influenced by exogenous factors such as temperature; low relative humidity; both excess moisture in soil and a lack thereof; and great thermal amplitude, that acting together or isolated promote floral anomalies, which will imply in defective and non-market production (CARDOSO et al, 2017). Therefore, better results will be observed in plants that suffer less exposure to such exogenous factors; consequently, using cultivars that present shorter phenological cycle (i.e.…”

Section: Resultsmentioning

confidence: 99%

Thermal Requirement and Phenological Characterization of Papaya Varieties Cultivated Under Subtropical Climate

Silva

Leonel

Souza

et al. 2019

R_I

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THERMAL REQUIREMENT AND PHENOLOGICAL CHARACTERIZATION OF PAPAYA VARIETIES CULTIVATED UNDER SUBTROPICAL CLIMATE MARCELO DE SOUZA SILVA1; SARITA LEONEL2; JACKSON MIRELLYS AZEVÊDO SOUZA2; RAFAEL BIBIANO FERREIRA2; JOYCE HELENA MODESTO2 E ANA CAROLINA BATISTA BOLFARINI2 1 Departamento de Produção Vegetal, Faculdade de Agronomia e Engenharia Florestal – FAEF, Rod. Cmte. João Ribeiro de Barros, Km 420, 17400-000, Garça - SP, Brasil, mace-lo-souza@hotmail.com. 2 1Departament. de Agronomia/Horticultura, Faculdade de Ciências Agronômicas da UNESP, Av. Universitária, nº 3780 - Altos do Paraíso, 18610-03, Botucatu – SP, Brasil, sarinel@fca.unesp.br, jackson.mirellys@hotmail.com, aprigio_bibiano@hotmail.com, joyce_helena_modesto@hotmail.com, anacarolinabolfarini@hotmail.com. 1 ABSTRACT The thermal sum has been widely used to correlate phenological phases of a culture, a technique used to quantify the time required for any phenological phase in any type of environmental conditions, independently of the species. In view of the above, this study aimed to evaluate the thermal requirement and phenological characterization of papaya varieties cultivated under subtropical climate. It was measured the following phenological stages length: from planting to flowering (PF), from flowering to harvest (FH) and from planting to the beginning of harvest (PH), by measuring the time elapsed between each phenological phase. Female and hermaphrodite flowers were considered for measuring the growth curves of fruits by evaluating length (LF) and diameter (DF) of the fruits at 15-day intervals. The thermal requirement was measured by the accumulation of thermal sum in degree-days (DD) during different phenological phases and fruits development period. In current study conditions, it was possible to infer that Sunrise Solo variety and hybrid Tainung nº 1 are earlier, with an approximately 10-month interval between planting and the beginning of the harvest; therefore, necessitating accumulation of 1722.2 and 1798.1 degree-days, respectively. Keywords: Carica papaya L., degree-days, plant performance. SILVA, M. S.; LEONEL, S.; SOUZA, J. M. A.; FERREIRA, R. B.; MODESTO, J. H.; BOLFARINI, A. C. B. EXIGÊNCIA TÉRMICA E CARACTERIZAÇÃO FENOLÓGICA DE VARIEDADES DE MAMOEIRO CULTIVADAS SOB CLIMA SUBTROPICAL 2 RESUMO A soma térmica tem sido amplamente utilizada para correlacionar fases fenológicas de uma cultura, uma técnica utilizada para quantificar o tempo necessário para qualquer fase fenológica em qualquer tipo de condição ambiental, independentemente da espécie. Frente ao exposto, objetivou-se com este estudo avaliar a exigência térmica e caracterização fenológica de variedades de mamoeiro cultivadas sob clima subtropical. Foi mensurado a duração dos seguintes estádios fenológicos: plantio ao florescimento (PF), florescimento à colheita e plantio ao início da colheita, através da aferição do tempo decorrido entre cada fase fenológica. As curvas de crescimento dos frutos, acompanhadas em flores femininas e hermafroditas, foram determinadas mediante avaliação do comprimento e diâmetro dos frutos em intervalos de 15 dias. Já a exigência térmica foi mensurada através do acumulo da soma térmica em graus-dia, durante as diferentes fases fenológicas e para o período de desenvolvimento dos frutos. Nas condições do presente estudo foi possível inferir que a variedade Sunrise Solo e o híbrido Tainung nº1 são mais precoces, com intervalo entre o plantio e o início da colheita de aproximadamente 10 meses, necessitando do acúmulo de 1722,2 e 1798,1 graus-dia, respectivamente. Palavras-chave: Carica papaya L., graus-dia, performance de plantas.

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“…Throughout the progress of UENF papaya breeding program, studies were undertaken on GCA and SCA to select new hybrids. Some of these studies examined traits related to fruit yield and quality (Ide et al, 2009;Cardoso et al, 2014;Barros et al, 2017), fruit deformity (Cardoso et al, 2017), and disease resistance (Vivas et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Combining ability of recombined F4 papaya lines: a strategy to select hybrid combination

Vettorazzi

Santa-Catarina

Poltronieri

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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The growing demand for quality of papaya by the domestic and international markets requires the development of genotypes that are capable of incorporating traits, such as high yield and fruit quality. This study estimated the genetic parameters and the specific combining ability of F 4 papaya lines crossed to the SS-72/12 tester to identify genotypes with higher genetic value for hybrid production. We evaluated 169 treatments consisting of 62 topcross hybrid combinations, 97 F 5 lines, and 10 controls in a 13 × 13 lattice design with five replicates and two plants per plot. The following traits were evaluated: plant height (PH), stem diameter (SD), first-fruit insertion height (FFIH), number of marketable fruits (NMF), number of deformed fruits (NDF), number of fruitless nodes (NFN), average fruit weight (FW), and yield (YLD). Differences p < 0.05 were found in most traits evaluated. The specific combining ability estimates indicate that hybrids formed by the cross between SS-72/12 tester and the following lines are promising, considering the multiple traits: UCLA08

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Diallel mixed-model analysis of papaya fruit deformities

Cited by 7 publications

References 8 publications

ESTIMATES OF GENETIC PARAMETERS AND SELECTION OF THREE-WAY CROSS CUPUAS-SU TREE PROGENIES (Theobroma grandiflorum)

ESTIMATES OF GENETIC PARAMETERS AND SELECTION OF THREE-WAY CROSS CUPUAS-SU TREE PROGENIES (Theobroma grandiflorum)

Thermal Requirement and Phenological Characterization of Papaya Varieties Cultivated Under Subtropical Climate

Combining ability of recombined F4 papaya lines: a strategy to select hybrid combination

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