Estimativas de correlações genotípicas e fenotípicas em germoplasma de maracujazeiro

Oliveira, E. J. de; Santos, V. da S.; Lima, Diego Souza de; Machado, Marlos Dourado; Lucena, Rangel Sales; Motta, Tiago Borges Nunes

doi:10.1590/s0006-87052011000200002

Cited by 15 publications

(8 citation statements)

References 10 publications

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“…These correlation estimates make it possible to predict the response of a trait when selection is performed on another correlated trait. In other words, for instance, it allows for selection on an easily measurable trait to obtain gains in one that is difficult to measure (Oliveira et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Research Article Characterization of a segregating population of passion fruit with resistance to Cowpea aphid-borne mosaic virus through morpho-agronomic descriptors

Santos¹,

Viana²,

Preisigke³

et al. 2019

Genet. Mol. Res.

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In passion-fruit breeding programs, characterizing genotypes developed through morpho-agronomic descriptors helps quantify genetic diversity and identify individuals with desirable qualities. We examined the discriminatory ability of passion-fruit descriptors and determined their relative importance in the characterization of 91 genotypes from a breeding program for resistance to Cowpea aphid-borne mosaic virus. Twenty-four quantitative and 14 multi-category qualitative descriptors related to plant, leaf, flower, and fruit characteristics were used. The quantitative descriptors were subjected to correlation and principalcomponent analyses and selected based on direct selection and the Singh method. The traits were used to obtain a distance matrix, based on Gower's algorithm, and a comparative clustering between the dendrograms for the morpho-agronomic variables was obtained using the unweighted pair group method with arithmetic mean procedure. Based on the principal components method, the traits that most contributed to genetic variability were number of seeds (23.241%), petiole length (19.438%), and petal width (10.440%). In its turn by the Singh method, the traits androgynophore length (6.68%), ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 18 (2): gmr18255 V.O. dos Santos et al. 2followed by flower length (5.47%), area under the disease progress curve (5.27%), and peduncle length (5.17%) were those which most contributed to the differentiation of genotypes. Although seven descriptors (leaf length, bract width, corona long filament length, sepal length, fruit width, fruit mass, and mass of fruit pulp) showed little contribution to the characterization of genotypes, their discard is not suggested, as they significantly contribute to the discrimination of genetic divergence in the population. Comparative analysis between the dendrogram containing all descriptors and the dendrogram containing only flower, leaf, or fruit descriptors evidenced the need for using a large number of descriptors in the characterization of genetic diversity in Passiflora. The use of all 38 descriptors increased the efficiency in the discrimination of groups.

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Section: Resultsmentioning

confidence: 99%

Research Article Characterization of a segregating population of passion fruit with resistance to Cowpea aphid-borne mosaic virus through morpho-agronomic descriptors

Santos¹,

Viana²,

Preisigke³

et al. 2019

Genet. Mol. Res.

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“…According to [35], DF and LF are strongly correlated with each other and with TS, but no correlation with YP was found, indicating that larger fruits in P. alata populations do not necessarily have higher pulp content. For P. edulis, there are several reports of negative correlations between TS and WF, WP, DF, LF, number of fruits and Yield [26, [36][37][38] enabling breeders to successfully select against TS.…”

Section: Plos Onementioning

confidence: 99%

Improving yield and fruit quality traits in sweet passion fruit: Evidence for genotype by environment interaction and selection of promising genotypes

et al. 2020

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Breeding for yield and fruit quality traits in passion fruits is complex due to the polygenic nature of these traits and the existence of genetic correlations among them. Therefore, studies focused on crop management practices and breeding using modern quantitative genetic approaches are still needed, especially for Passiflora alata, an understudied crop, popularly known as the sweet passion fruit. It is highly appreciated for its typical aroma and flavor characteristics. In this study, we aimed to reevaluate 30 genotypes previously selected for fruit quality from a 100 full-sib sweet passion fruit progeny in three environments, with a view to estimating the heritability and genetic correlations, and investigating the GEI and response to selection for nine fruit traits (weight, diameter and length of the fruit; thickness and weight of skin; weight and yield of fruit pulp; soluble solids, and yield). Pairwise genetic correlations among the fruit traits showed mostly intermediate to high values, especially those associated with fruit size and shape. Different genotype rankings were obtained regarding the predicted genetic values of weight of skin, thickness of skin and weight of pulp in each environment. Finally, we used a multiplicative selection index to select simultaneously for weight of pulp and against fruit skin thickness and weight. The response to selection was positive for all traits except soluble solids, and the 20% superior (six) genotypes were ranked. Based on the assumption that incompatibility mechanisms exist in P. alata, the selected genotypes were intercrossed in a complete diallel mating scheme. It is worth noting that all genotypes produced fruits, which is essential to guarantee yields in commercial orchards.

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“…According to Martins et al (2003), DF and LF are strongly correlated with each other and with TS, but no correlation with YP were found, indicating that larger fruits in P. alata populations do not necessarily have higher pulp content. For P. edulis, there are several reports of negative correlations between TS and WF, WP, DF, LF, number of fruits and Yield (Moraes et al, 2005;Oliveira et al, 2011;Silva et al, 2017;Viana et al, 2017) enabling breeders to successfully select against TS.…”

Section: Discussionmentioning

confidence: 99%

Improving yield and fruit quality traits in sweet passion fruit: evidence for genotype by environment interaction and cross-compatibility in selected genotypes

Chavarría-Perez

Giordani

Dias

et al. 2019

Preprint

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Breeding for yield and fruit quality traits in passion fruits is complex due to the polygenic nature of these traits and the existence of genetic correlations among them. Therefore, studies focused on crop management practices and breeding using modern quantitative genetic approaches are still needed, especially for Passiflora alata, an understudied crop, popular known as the sweet passion fruit. It is assumed to be a self-incompatible species and is highly appreciated for its typical aroma and flavor characteristics. With the aim of estimating the genetic and phenotypic parameters related to fruit traits, our group has already investigated a sweet passion fruit progeny consisting of 100 individuals from which 30 genotypes were selected. In this study, we reevaluated these superior genotypes in three environmental conditions. The results of the multi-environment trial analysis indicate that the genotypes do not behave consistently across these environments, and this was taken into account when selecting genotypes. Pairwise genetic correlations among the fruit traits were evaluated, and different genotype rankings obtained depending on the trait and environment, providing further evidence of genotype by environment interaction. Finally, we used a multiplicative selection index to select 20% of genotypes for weight of pulp and against thickness and weight of the fruit skin. The response to selection was positive for all traits except soluble solids, and the superior (six) genotypes were ranked. The consensus is that open-pollinated populations can be used as commercial varieties in crop species that are sensitive to inbreeding depression or within breeding programs that are not well developed. For these reasons, we performed a complete diallel cross for evaluating the capability of the selected genotypes to be fertilized and set fruits. Most of the crosses were compatible, resulting in over 50% fruit set. It is worth noting that all genotypes produce fruits if used as females, which is essential to guarantee yields in commercial orchards.

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Estimativas de correlações genotípicas e fenotípicas em germoplasma de maracujazeiro

Cited by 15 publications

References 10 publications

Research Article Characterization of a segregating population of passion fruit with resistance to <i>Cowpea</i> <i>aphid-borne</i> <i>mosaic</i> <i>virus</i> through morpho-agronomic descriptors

Research Article Characterization of a segregating population of passion fruit with resistance to <i>Cowpea</i> <i>aphid-borne</i> <i>mosaic</i> <i>virus</i> through morpho-agronomic descriptors

Improving yield and fruit quality traits in sweet passion fruit: Evidence for genotype by environment interaction and selection of promising genotypes

Improving yield and fruit quality traits in sweet passion fruit: evidence for genotype by environment interaction and cross-compatibility in selected genotypes

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