Genetic parameter estimates in yellow passion fruit based on design I

Gonçalves, Gabriel Moreno Bernardo; Viana, Alexandre Pío; Pereira, Messias Gonzaga; Neto, Francisco Valdevino Bezerra; Pereira, Telma Nair Santana; Gonçalves, Tiago José Menezes

doi:10.1590/s1516-89132009000300002

Cited by 14 publications

(8 citation statements)

References 4 publications

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“…De acordo com Gonçalves et al (2009), a variância de dominância é mais importante do que a genética aditiva, para número de frutos por planta, espessura da casca e número de dias para floração, o que indica forte efeito ambiental e presença de sobredominância no controle dessas características. Nesse sentido, é possível explorar essas informações para maximizar o uso da variância de dominância na obtenção de híbridos heteróticos para essas características, além de continuar selecionando genótipos superiores em populações segregantes para outras características, como MF, CF e DF, em que os ganhos genéticos são baseados na magnitude da variância genética aditiva.…”

Section: Resultsunclassified

Avaliação de recursos genéticos de maracujazeiro‑amarelo

Freitas

Oliveira

Neto

et al. 2011

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi caracterizar e avaliar recursos genéticos de maracujazeiro-amarelo (Passiflora edulis) quanto às principais características de importância econômica. Foram realizadas avaliações agronômicas e estimados parâmetros genéticos em 38 acessos do Banco Ativo de Germoplasma de Maracujazeiro da Embrapa Mandioca e Fruticultura, tendo-se utilizado cinco testemunhas provenientes de seleções ou melhoradas geneticamente. Foram avaliadas duas características produtivas, três características de qualidade química e sete atributos físicos dos frutos. Utilizou-se o delineamento de blocos aumentados, com quatro repetições e parcela de dez plantas. O elevado coeficiente de variação genética, o índice de variação maior que a unidade e os altos valores de herdabilidade indicam a existência de grande variabilidade genética ainda não explorada, bem como de condições favoráveis ao melhoramento genético. Para a maioria das características avaliadas, os acessos foram superiores às testemunhas. Os acessos BGM185 e BGM051 são mais promissores para o mercado de frutas frescas, pela qualidade dos frutos, enquanto os acessos BGM181, BGM034, BGM123 e BGM079 são indicados para a indústria de sucos, por apresentar alta produtividade e rendimento de polpa.Termos para indexação: Passiflora edulis, caracterização, germoplasma, melhoramento. Evaluation of genetic resources of yellow passion fruitAbstract -The objective of this work was to characterize and evaluate genetic resources of yellow passion fruit (Passiflora edulis) for its main economic traits. Agronomic evaluations were made and genetic parameters were estimated in 38 germplasm accessions from the passion fruit germplasm bank of Embrapa Mandioca e Fruticultura, using five controls from selections or genetically improved material. Two productive characteristics, three chemical qualities, and seven physical attributes of fruit were evaluated. An augmented block design with four replicates and ten plants per plot was used. The high coefficient of genetic variation, the index of variation greater than one, and the high heritability values indicate the existence of high genetic variability not yet explored, as well as favorable conditions to implement a breeding program. For most of the traits evaluated, accessions were superior to the controls. Accessions BGM185 and BGM051 are more promising for the fresh fruit market, due to fruit quality, while accessions BGM181, BGM034, BGM123, and BGM079 are recommended for the fruit juice industry, due to high productivity and pulp yield.

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Section: Resultsunclassified

Avaliação de recursos genéticos de maracujazeiro‑amarelo

Freitas

Oliveira

Neto

et al. 2011

Pesq. agropec. bras.

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“…Using this approach, Gonçalves et al, (2009) obtained progenies through crosses between sour passion fruit cultivars (Passiflora edulis L.), following the Design I of Comstock & Robinson (1948), in order to estimate the genetic parameters. The analysis of variance revealed great variability to be explored in the studied population.…”

Section: Inheritance Standard Of the Main Traitsmentioning

confidence: 99%

Breeding Passion Fruit Populations - Review and Perspectives

Ribeiro¹,

Viana²,

Santos³

et al. 2019

FPBJ

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Passion fruit tree belongs to the family Passifloraceae. The genus Passiflora is considered of great economic value, and the main species cultivated is Passiflora edulis Sims. Brazil is the largest world producer of passion fruit, with annual production of around 823 thousand tons. In order to meet the demand for fruits from both domestic and international markets, as well as from the fresh consumption market and industry, the genetic breeding of this species has proved to be the major connection between farmers and the consumer market. Therefore, the Universidade Estadual do Norte Fluminense Darcy Ribeiro has been developing a passion fruit breeding program since 2002 and has recently launched a new variety-UENF Rio Dourado-which is already available to farmers. Aiming to overcome all obstacles for cultivation, the passion fruit genetic breeding program carried out by the UENF seeks to obtain the genetic progress of the crop and provide new cultivars even more productive and more resistant to the main pathogens of this species. Thus, this work aims to carry out a survey on the breeding of the crop and report future prospects made possible by the introduction of new techniques into the sour passion fruit breeding program.

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“…In general, experiments with passion fruit, including the trials conducted at UENF, adopt the randomized-block design (Viana et al, 2003;Gonçalves et al, 2009;Silva et al, 2009). However, the efficiency of this design may be compromised as the number of treatments increases.…”

Section: Introductionmentioning

confidence: 99%

Research Article Novel selection strategy for half-sib families of sour passion fruit <i>Passiflora</i> <i>edulis</i> (Passifloraceae) under recurrent selection

Cavalcante¹,

Viana²,

Filho³

et al. 2019

Genet. Mol. Res.

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Several strategies have been employed in the breeding of passion fruit with a view to the generation of superior progeny. In an effort to develop more precise methods in breeding, we compared the efficiency of the Post-Hoc Blocking Row-Col technique, which is an a posteriori technique that consists of the overlapping of a block structure on the original-field design, with a randomized-block design and compared different selection strategies within and among half-sib families, using the REML/BLUP mixed-model methodology. Twenty-three half-sib families from the third cycle of recurrent selection of the breeding program of Universidade Estadual do Norte Fluminense Darcy Ribeiro -UENF were evaluated. The trial took place in the experimental unit of UENF, in Itaocara -RJ, Brazil. Plants were trained on vertical stakes, with four replicates and three plants per plot. They were assessed individually for the traits number of fruits per plant, fruit mass per plant, fruit length, fruit diameter, peel thickness, total soluble solids, pH, pulp percentage, and production per plant. No significant difference was found in the test of efficiency of the designs for any of the evaluated traits. Withinfamily heritability (h 2 ad ) had a similar magnitude to individual heritability (h 2 a ), indicating that even in the 4th cycle of recurrent ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 18 (2): gmr18305 N.R. Cavalcante et al. 2selection, genetic variability still exists within the evaluated progeny. Selection within half-sib families provided superior gains when compared with selection among families for the traits number of fruits; production; fruit mass, length, and diameter; total soluble solids; pH; and pulp percentage. The best selection strategy was within families, as it generated higher selection-gain estimates than those obtained with selection between families and the directselection and index-selection approach.

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Genetic parameter estimates in yellow passion fruit based on design I

Abstract: ABSTRACT

Cited by 14 publications

References 4 publications

Avaliação de recursos genéticos de maracujazeiro‑amarelo

Avaliação de recursos genéticos de maracujazeiro‑amarelo

Breeding Passion Fruit Populations - Review and Perspectives

Research Article Novel selection strategy for half-sib families of sour passion fruit <i>Passiflora</i> <i>edulis</i> (Passifloraceae) under recurrent selection

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