Genetic parameters, adaptability and stability to selection of yellow passion fruit hybrids

Neto, Alírio José da Cruz; Rosa, Raul Castro Carriello; Oliveira, E. J. de; Sampaio, S. R.; Santos, Idália Souza dos; Souza, Plácido Ulisses; Passos, Adriana Rodrigues; Jesus, O. N. de

doi:10.1590/1984-70332016v16n4a48

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…Genetic control improves the study of qualitative and quantitative characters by quantifying genetic and environmental contributions to the phenotype (Cruz Neto et al., 2016). Thus, estimates of variance, heritability, and number of genes by agronomic character are presented in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Genetic parameters and selection indexes in F2 and F2:3 soybean populations

et al. 2021

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The evaluation of genetic parameters in early generations select individuals in F2 and F2:3 and advancing only progenies with the potential to generate pure productive lines. The objectives of this study were to estimate genetic and phenotypic parameters in F2 and F2:3 populations derived from UFUS 7415 and TMG 7161 RR, evaluate different genotype selection strategies, and select progenies to improve agronomic traits. Populations in the F2 and F2:3 generations derived from a biparental cross between the parents UFUS 7415 and TMG 7161 RR were evaluated. The genetic parameters of 360 individuals in the F2 generation and 150 genotypes of each parent were evaluated. Heritability varied from 4.66% for the number of seeds per pod to 86.06% for plant height at flowering. The greatest selection gain was obtained for plant height at flowering (29.68%), related to grain production. In the F2:3 generation, 145 genotypes were evaluated and their parents, in a randomized block design with two replications. The correlations between characters and the genetic gains obtained by direct and indirect selection and based on the genotype–ideotype distance index and the Mulamba and Mock index of the sum of “ranks” were evaluated. With direct selection, selection gains ranged from –5.34 to 16.19%. The genotype–ideotype distance index showed a total selection gain of 40.49%, while the Mulamba and Mock index of the sum of ranks obtained a total gain of 39.35%. Twenty‐three genotypes were selected for the characters evaluated with both indexes in the F3 generation.

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Section: Resultsmentioning

confidence: 99%

Genetic parameters and selection indexes in F2 and F2:3 soybean populations

et al. 2021

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“…Cruz Neto et al. (2016) and Jesus et al. (2016) also found little gain/variation in yellow passion fruit hybrids for SS and TA.…”

Section: Discussionmentioning

confidence: 94%

“…Thus, the morphological, agronomic and CABMV resistance characterization of these progeny is essential not only to identify the best genotypes, but also to establish the variance components to better predict the genetic values to maximize selection accuracy. Among the methods for estimating genetic parameters, restricted maximum likelihood/best linear unbiased prediction (REML/BLUP) has been successfully reported for Passiflora (Cruz Neto et al., 2016; Preisigke et al., 2020), due to the better accuracy of the technique in relation to selection index or phenotypic selection (Preisigke et al., 2020). Therefore, the goal of this work was to characterize different progeny of the second backcross generation (BC2) [BC1 × P. edulis ] through morphological and agronomical descriptors, in order to identify promising individuals resistant to passion fruit woodiness disease from natural infection.…”

Section: Introductionmentioning

confidence: 99%

Field assessment of a second generation backcross (BC1 × Passiflora edulis) of passion fruit for agronomic performance and resistance to CABMV

et al. 2021

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The objective of this work was to characterize and identify among the passion fruit hybrids of the second generation backcross (BC2: BC1 × P. edulis), resistance to passion fruit woodiness disease (CABMV) with desirable agronomic attributes. Ninety‐two progeny of BC2 hybrids were evaluated for severity of the virus in conditions of field, physical and chemical characterization of the fruits and precocity of the plant in relation to the vegetative and reproductive phases. The data were analysed using multivariate statistics and mixed models (REML/BLUP) to estimate genetic parameters. The σg2 was conditioned by σd2 and σa2, for number of fruits, fruit and peel weight and soluble solids and the effect of σa2 for virus severity to CABMV and effect of σd2 on the variables fruit length, fruit diameter, peel thickness and pulp weight. For the titratable acidity it had no σg2. The progeny BC2‐A, BC2‐C, BC2‐E, BC2‐F and BC2‐H families can be selected for use in passion fruit breeding programmes by adding high vegetative vigour, early fruit production, resistance to CABMV and also desirable agronomic attributes.

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“…The susceptibility observed in the six intraspeci c hybrids of P. edulis (H09-111, H09-02, H09-110, H09-09, H09-112 and H09-158) is directly related to the selection of parentals, taking into consideration only agronomic attributes of vigor and production [58,59]. Interspeci c hybrids of the third generation of backcrossing (BC 3 ) despite having contrasting genitors, BGP330 (P. edulis; susceptible) and BGP077 (P. cincinnata; resistant) [24] did not present resistance to CABMV, probably related to the low number of evaluated progenies (n = 21) or fact that there are few genes or resistance losses in BC 3 , since 93.75% of the genome involved in the backcrossing belongs to the susceptible recurrent genitor (P. edulis).…”

Section: Discussionmentioning

confidence: 99%

Cowpea aphid-borne mosaic virus (CABMV) in Passiflora by qPCR analysis reveals asymptomatic plants with viruses and new species with immunity

Gonçalves¹,

Jesus²,

Lima³

et al. 2021

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The passion fruit woodiness disease (Cowpea aphid-borne mosaic virus – CABMV) causes socioeconomic problems for Brazilian passion fruit crop. Understanding the temporal progress of the disease and identifying resistance sources to CABMV are essential steps to develop resistant varieties. The objective of the study was to evaluate temporal progress of passion fruit woodiness disease, identify Passiflora genotypes with CABMV resistance and to detect virus infection in asymptomatic plants by qPCR. The experiment was conducted in a greenhouse using 128 genotypes belonging to 12 species and three hybrids (inter and intraspecific) of Passiflora evaluated in five periods after inoculation. The symptoms severity was quantified from the disease index (DI%). The CABMV infection in symptomatic plants was confirmed by RT-PCR and in asymptomatic plants by qPCR. Progress rates and disease severity were lower in the species P. cincinnata, P. gibertii, P. miersii e P. mucronata compared to P. edulis, P. alata, Passiflora sp. and hybrids. Of the evaluated genotypes, 20.31% were resistant, with emphasis on the accessions of P. suberosa, P. malacophylla, P. setacea, P. pohlii e P. bahiensis that did not show symptoms of virus. The absence of symptoms does not imply immunity of plants to the virus, as the qPCR analysis confirmed infection by the virus in asymptomatic plants of P. cincinnata, P. gibertii, P. miersii, P. mucronata, P. setacea, P. malacophylla e P. suberosa. Even after four inoculations, the virus was not detected by qPCR in the upper leaves in plants of P. pohlii and P. bahiensis indicating that these species are immune to CABMV.

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Genetic parameters, adaptability and stability to selection of yellow passion fruit hybrids

Cited by 13 publications

References 20 publications

Genetic parameters and selection indexes in F2 and F2:3 soybean populations

Genetic parameters and selection indexes in F2 and F2:3 soybean populations

Field assessment of a second generation backcross (BC1 × Passiflora edulis) of passion fruit for agronomic performance and resistance to CABMV

Cowpea aphid-borne mosaic virus (CABMV) in Passiflora by qPCR analysis reveals asymptomatic plants with viruses and new species with immunity

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