Predição de ganhos genéticos utilizando o Delineamento I em população de maracujazeiro

Neves, Leonarda Grillo; Bruckner, Claudio Horst; Cruz, Cosme Damião; Duarte, Leonardo Pimentel; Krause, Willian

doi:10.1590/s1806-66902011000200032

Cited by 6 publications

(8 citation statements)

References 14 publications

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“…As leituras foram feitas em amostras de suco da polpa, extraído por prensagem manual e filtragem em tela de nylon (Neves et al, 2011). A produtividade (kg ha -1 ) foi determinada após colheita e pesagem dos frutos da parcela, nos diferentes tratamentos.…”

Section: Methodsunclassified

Produtividade e qualidade de frutos de cultivares de maracujazeiro-amarelo com ou sem polinização artificial

Krause

Neves

Viana

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a influência da polinização artificial na produtividade e qualidade de frutos de cultivares de maracujazeiro-amarelo. Foram utilizadas sete cultivares comerciais de maracujazeiro-amarelo, em dois experimentos realizados na região de Tangará da Serra, MT, em delineamento de blocos ao acaso, com cinco repetições e parcelas constituídas por duas linhas de quatro plantas. No primeiro experimento, a polinização foi natural; no segundo, foi realizada a polinização artificial, duas vezes por semana. O plantio foi feito no dia 11 de janeiro de 2010 e as colheitas no período de julho de 2010 à março de 2011. A polinização artificial aumentou a produtividade de todas as cultivares, mas estas apresentaram diferentes sensibilidades à técnica. Quando a polinização artificial foi utilizada, as cultivares FB 100, FB 200 e BRS Ouro Vermelho tiveram maior rendimento do que IAC 275, IAC 277, BRS Sol do Cerrado e BRS Gigante Amarelo. A polinização artificial aumenta a produtividade, a massa de fruto, o diâmetro e comprimento de fruto e a percentagem de polpa, e reduz a espessura de casca. Há indicação de forte interação genótipo por ambiente, quanto à produtividade das cultivares avaliadas.Termos para indexação: Passiflora edulis, Xylocopa, florescimento, produção, variedades. Productivity and fruit quality of yellow passion fruit cultivars with or without artificial pollinationAbstract -The objective of this work was to evaluate the influence of artificial pollination on productivity and fruit quality of yellow passion fruit cultivars. Seven commercial cultivars of yellow passion fruit were evaluated in two experiments carried out in Tangará da Serra, MT, Brazil, in a randomized block design with five replicates and plots consisting of two rows of four plants. In the first experiment, pollination was natural, whereas in the second it was artificial, performed twice a week. Planting was done on January 11, 2010, and harvests occured from July 2010 to March 2011. Artificial pollination increase the productivity of all cultivars, but their response to the technique varied. When artificial pollination was used, the cultivars FB 100, FB 200 and BRS Ouro Vermelho had a higher productivity than IAC 275, IAC 277, BRS Sol do Cerrado e BRS Gigante Amarelo. Artificial pollination increases productivity, fruit mass, diameter and length of fruit, and pulp percentage, and it reduces peel thickness. Strong genotype by environment interaction may be occurring, as for the productivity of the evaluated cultivars.

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Section: Methodsunclassified

Produtividade e qualidade de frutos de cultivares de maracujazeiro-amarelo com ou sem polinização artificial

Krause

Neves

Viana

et al. 2012

Pesq. agropec. bras.

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“…The additive genetic variance is the most important component of the variance, it is the principal cause of similarity between relatives and determining the genetic properties of the population and the response of the population to the selection (Neves et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters estimates and visual selection for leaves production in Ilex paraguariensis

2017

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ABSTRACT:The selection of yerba mate superior genotypes, based on each plant leaf weight, is based on genetic parameters obtained from experimental plantations and it is practically impossible from the fourth year of age. Therefore, we estimate genetic parameters and check the feasibility of selection through notes and weight estimates of each tree at 18.5 years of age. The The additive genetic correlations between the real weight of leaves × notes and real weight of leaves × visually estimated weight were of high magnitude (higher than 88%). Thus, the selection based on the leaves weight can be carried out without major losses in genetic gains by both methodologies when the purpose is the sexual selection, in which case the sort order has no importance.In the case of vegetative propagation, aiming clonal plantations, in which only the plants with the highest genotypic values should be selected, the selection by means of notes and leaves weight estimates proved to be inefficient.

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“…For all evaluated traits, the coefficients of heritability in the level of males were higher than those in the levels of females and females within those of males; these values varied between 33.59% for STF to 98.37% for PF. High heritability values can occur in traits of little additive genetic variance because they are not much influenced by the environment (Neves et al, 2011). Similarly, de Magalháes Bertini et al (2006 reported that the more elevated broad-sense heritability values, relative to the said traits, indicated greater influence of the non-additive and environmental effects.…”

Section: Resultsmentioning

confidence: 99%

“…To this end, it is important to acquire information, such as estimates of genetic variance components and heritability coefficients, which will support the appropriate choice of breeding strategy as well as enable the estimation of gains from selection (Aguiar, 2003). For a breeder, one considerably important practice is the selection of superior phenotypes of either individuals or families, as acquisition of improved populations requires selection and recombination of individuals or families (Neves et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The layouts of the families of this design enable the adoption of different selection strategies such as selection among males, females, and females hierarchized to males, and combined selection (Cruz and Carneiro, 2003). Design I has been used relatively less in cotton cultivation; however, it is more frequently used with other crops such as maize (Hallauer et al, 1988;Eyherabide and Hallauer, 1991;Furtado, 1996) and yellow passion fruit (Gonçalves et al, 2007;Neves et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Genetic gains from selection for fiber traits in Gossypium hirsutum L.

et al. 2016

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ABSTRACT. Brazil is among the five largest producers of cotton in the world, cultivating the species Gossypium hirsutum L. r. latifolium Hutch. The cultivars should have good fiber quality as well as yield. Genetic improvement of fiber traits requires the study of the genetic structure of the populations under improvement, leading to the identification of promising parent plants. To this end, it is important to acquire some information, such as estimates of genetic variance components and heritability coefficients, which will support the appropriate choice of the breeding strategy to be employed as well as enable the estimation of gains from selection. This study aimed to evaluate some agronomic characteristics, such as fiber quality and yield, estimating genetic parameters for the purpose of predicting earnings. Twelve cultivars of cotton, including four male progenitors (CNPA 01-42, BRS Verde, Glandless, and Okra leaf) and eight female progenitors (Delta opal, CNPA 7H, Aroeira, Antares, Sucupira, Facual, Precoce 3, and CNPA 8H), were used in performing crosses according to design I, proposed by Comstock and Robinson (1948). The experimental design was a randomized block with four replications. We observed genetic variability among all traits as well as higher efficiency of selection for the gains related to traits. Our results showed that the combined selection presented the highest genetic gains for all traits. For fiber length, the female/male selection and the combined selection resulted in the highest genetic gain.

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Predição de ganhos genéticos utilizando o Delineamento I em população de maracujazeiro

Cited by 6 publications

References 14 publications

Produtividade e qualidade de frutos de cultivares de maracujazeiro-amarelo com ou sem polinização artificial

Produtividade e qualidade de frutos de cultivares de maracujazeiro-amarelo com ou sem polinização artificial

Genetic parameters estimates and visual selection for leaves production in Ilex paraguariensis

Genetic gains from selection for fiber traits in Gossypium hirsutum L.

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