Estimativas de parâmetros genéticos e fenotípicos em mamão

Foltran, Dulcinéia Elizabete; Gonçalves, Paulo de Souza; Sabino, José Carlos; Igue, Toshio; Vilela, Regina Célia Freitas

doi:10.1590/s0006-87051993000100002

Cited by 3 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Em mamoeiro, as estimativas dos parâmetros genéticos mostram a possibilidade de uso de métodos simples de melhoramento, como a seleção massal quanto à altura da planta, ao diâmetro do caule, ao comprimento do internódio, ao número de folhas e ao índice foliar (Foltran et al, 1993). Em relação à qualidade fisiológica de sementes, há relatos de alta herdabilidade para algumas características (Cardoso et al, 2009).…”

Section: Introductionunclassified

Avaliação de genótipos de mamoeiro com uso de descritores agronômicos e estimação de parâmetros genéticos

Dias

Oliveira

Dantas

2011

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi avaliar descritores quantitativos e estimar parâmetros genéticos em genótipos de mamoeiro (Carica papaya). Foi instalado um experimento em blocos aumentados, para a avaliação de 27 genótipos, entre cultivares, variedades melhoradas e variedades locais, com o uso de 30 descritores relacionados à planta, folhas, flores, frutos e sementes. Após diversos ciclos de melhoramento, os genótipos ainda mostravam ampla variabilidade quanto aos descritores avaliados. A maior parte da variação fenotípica ocorreu em razão da variância genotípica. A herdabilidade variou de 60,48 a 99,05% e, em 80% dos casos, foi superior a 80,46%. A razão entre o coeficiente de variação genético e o ambiental foi maior do que a unidade para 63% das características. Há diferenças agronômicas suficientes para uso dos genótipos "per se" ou como parentais em programas de melhoramento, em razão de agregarem variação genética, qualidade de frutos e tipo agronômico.Termos para indexação: Carica papaya, desenvolvimento de variedades, melhoramento genético, seleção de parentais, variação genética. Evaluation of papaya genotypes using agronomic descriptors and estimation of genetic parametersAbstract -The objective of this work was to evaluate quantitative descriptors and to estimate genetic parameters in genotypes of papaya (Carica papaya). An experiment was settled using augmented blocks, for the evaluation of 27 genotypes, among cultivars, improved lines and local varieties with 30 descriptors related to the plant, leaves, flowers, fruit and seeds. After several cycles of breeding, the genotypes still showed broad variability for the evaluated descriptors. Most of the phenotypic variation occurred due to genetic variance. The heritability ranged from 60.48 to 99.05%, and in 80% cases it was higher than 80.46%. The ratio between genetic and environmental coefficients of variation, was greater than the unity for 63% traits. There are enough agronomic differences which allow for the use of the genotypes "per se" or as parents in breeding programs because they aggregate genetic variation, fruit quality and agronomic type.

show abstract

Section: Introductionunclassified

Avaliação de genótipos de mamoeiro com uso de descritores agronômicos e estimação de parâmetros genéticos

Dias

Oliveira

Dantas

2011

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…morpho-agronomic and fruit quality traits) in papaya genotypes, allows choosing suitable methods, e.g. simple breeding methods such as mass selection (FOLTRAN et al, 1993). Also, the selection in the segregating populations may reveal great chances of success, due to the wide genotype variability and high heritability values .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of papaya genotypes using agronomic descriptors and estimation of genetic parameters

Silva¹,

Leonel²,

Souza³

et al. 2018

Biosci. J.

View full text Add to dashboard Cite

ABSTRACT:In Brazil, the improvement of papaya agribusiness is correlated to the estimation of genetic parameters and evaluation of agronomic descriptors; thus enabling less favourable areas for the development and implementation of papaya crops. Therefore, the current study aimed to evaluate quantitative descriptors and to estimate genetic parameters in genotypes of papaya grown under subtropical climate in the state of São Paulo. The experimental design was randomized in block. The experimental units were grouped into seven blocks of five plants each and three treatments, which consisted of three different varieties: Sunrise Solo, Tainung nº1 and local. The psychochemical properties were analysed for plant height; intersection height of first fruits; stem diameter; male, female and hermaphroditic flower percentage; fruit number per plant; production; yield; normal fruits percentage, carpeloid and pentandric fruits; pulp matter; pulp length; pulp diameter; pulp shape; pulp cavity; pulp thickness; peel performance; pulp performance; seeds performance; seeds number; soluble solids; pH; titratable acidity; ratio; technological index; ascorbic acid and reducing sugars. Furthermore, most agronomic descriptors showed high heritability; besides that, the varieties Sunrise Solo and Tainung nº1 performed the best results in Botucatu.

show abstract

“…In papaya, the estimates of genetic parameters show the possibility of using simple breeding methods, such as mass selection for plant height, stem diameter, internode length, number of leaves, and leaf index (Foltran et al 1993). With regard to the physiological seed quality, some traits are reported to have high heritability (Cardoso et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Phenotypic characterization of papaya genotypes to determine powdery mildew resistance

Vivas

Silveira²,

Vivas³

et al. 2017

Crop Breed. Appl. Biotechnol.

View full text Add to dashboard Cite

Abstract:In support of breeding of papaya (Carica papaya) 'Caliman M5', 'GTF', and 'JS 11'. In the greenhouse experiment, the genotypes 'Caliman M5', 'Golden', 'Kapoho Solo', 'Waimanalo', 'Mamão Bené', 'JS 12', and 'GTF' had the lowest mean incidence in at least one evaluation. On the other hand, for severity, the genotypes 'Diva', 'Sunrise Solo 72/12', 'Kapoho Solo PA', 'Waimanalo', 'Maradol', 'Maradol GL', 'FMV, had the lowest means. These results indicate these genotypes for a possible use in breeding for reduction of powdery mildew intensity.

show abstract

Estimativas de parâmetros genéticos e fenotípicos em mamão

Cited by 3 publications

References 3 publications

Avaliação de genótipos de mamoeiro com uso de descritores agronômicos e estimação de parâmetros genéticos

Avaliação de genótipos de mamoeiro com uso de descritores agronômicos e estimação de parâmetros genéticos

Evaluation of papaya genotypes using agronomic descriptors and estimation of genetic parameters

Phenotypic characterization of papaya genotypes to determine powdery mildew resistance

Contact Info

Product

Resources

About