Heritability of peach tree resistance to bacterial leaf spot

Varago, André Luiz; Citadin, Idémir; Sachet, Marcos Robson; Penso, Gener Augusto; Raseira, M. do C. B.

doi:10.1590/s0100-204x2017000500010

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The magnitude of the heritability obtained shows that a moderate genetic control can be obtained, which ensures that the selection, at individual and progeny levels, would provide significant gains for the trait. Varago et al (2017) discuss that the individual heritability of 51.4% found in the selection of peach genotypes for resistance to bacterial leaf spot (Xanthomonas arboricola pv. pruni) implies the existence of genetic variability in the studied progeny, enabling us to infer that selection may be effective for obtaining genetic gains for the evaluated characteristic.…”

Section: Resultsmentioning

confidence: 99%

Estimation of genetic parameters and selection for rooting capacity in peach

Oliveira

Bruckner

Silva

et al. 2018

Crop Breed. Appl. Biotechnol.

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One of the most important criteria in the improvement of rootstocks is easiness of propagation. The objective of the present study was to verify the existence of genetic variability and the possibility of gains with selection in the rooting capacity among peach genotypes. Seventy-seven genotypes of peach belonging to five F 3 families were evaluated. Rooting percentage (RP), number of roots per cutting (NR) and mean root length (RL) were evaluated. Genetic values were estimated. The nineteen genotypes with the lowest rank summation index were selected to estimate the genetic gains. The variables RP, NR and RL had progeny mean heritabilities of 0.53, 0.60 and 0.83, respectively. Of the individuals selected, 89.5% belonged to the 713 (Talismã x Adafuel) family. The estimation of the genetic and phenotypic parameters show the possibility of success by selecting superior genotypes, with gains of 9.09, 17.47 and 24% for RP, NR and RL, respectively.

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Section: Resultsmentioning

confidence: 99%

Estimation of genetic parameters and selection for rooting capacity in peach

Oliveira

Bruckner

Silva

et al. 2018

Crop Breed. Appl. Biotechnol.

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“…The increase in accuracy and precision of visual estimates, particularly those performed by inexperienced raters, has already been reported for different SADs developed for the evaluation of bacterial spot in several crops (Braido et al, 2015;Duan, Zhao, Wang, & Yang, 2015;Nuñez et al, 2017). These diagrams have been used directly in breeding programs, aiding in disease resistance and genotype selection evaluations (Berrueta, Gimenez, Galvan, & Borges, 2016;Varago, Citadin, Sachet, Penso, & Raseira, 2017). It has also indirectly helped out these researches, subsidizing studies on the efficiency of control methods for diseases caused by Xanthomonas (Itako, Tolentino Jr., Silva Jr., Soman, & Maringoni, 2015;Rodrigues, Bueno, & Tebaldi, 2016).…”

Section: Introductionmentioning

confidence: 99%

Standard Area Diagram Set for Bacterial Spot Quantification in Entire-Margined Leaves of Sour Passion Fruit

Costa¹,

Peixoto²,

Blum³

et al. 2019

JAS

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This study developed and validated a standard area diagram set (SADs) to aid in the estimation of bacterial spot (Xanthomonas axonopodis pv. passiflorae) severity in entire-margined leaves of sour passion fruit (Passiflora edulis Sims). The SADs consisted of eight severity levels (3; 6; 12; 25; 50; 77, and 88%). For its validation, 20 raters, who initially estimated the disease severity without the aid of the SADs, were divided into groups (G1 and G3, inexperienced; G2 and G4, experienced). Subsequently, G1 and G2 performed the second evaluation without the SADs, and G3 and G4 completed the second evaluation using the proposed SADs. The accuracy and precision of the assessments were determined by simple linear regression and by the Lin’s concordance correlation coefficient. The increase in accuracy was confirmed by the 80% constant error-free estimates (G3 and G4) and 100% (G3) and 80% (G4) systematic error-free estimates when the SADs was used. Precision increased with the increase in the coefficient of determination, the reduction in absolute errors, and the increase in the reproducibility of the estimates between pairs of raters. Inexperienced raters benefited the most from the use of the SADs. The increase in the accuracy and precision in the non-aided groups, when present, was less pronounced than those increments observed in the SADs-aided groups. The Lin’s concordance correlation coefficient confirmed the increased accuracy and precision detected by the linear regression analysis and indicated increased agreement between the estimated and actual values of disease severity in the SADs-aided groups.

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Heritability of peach tree resistance to bacterial leaf spot

Cited by 2 publications

References 11 publications

Estimation of genetic parameters and selection for rooting capacity in peach

Estimation of genetic parameters and selection for rooting capacity in peach

Standard Area Diagram Set for Bacterial Spot Quantification in Entire-Margined Leaves of Sour Passion Fruit

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