Intrapopulation recurrent selection by mixed models in papaya of the formosa group

Moreira, Sarah Ola; Kuhlcamp, Karin Tesch; Barros, Fabíola Lacerda de Souza; Zucoloto, Moisés; Moitinho, A. C.

doi:10.1590/0100-29452018870

Cited by 4 publications

(6 citation statements)

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“…There was also significance for the genotype × control interaction, corroborating the significant difference between the two factors for the MSBS and MIBS variables. Moreira et al (2017) proposed the creation of half-sib families of C. papaya to potentiate between-and within-family selection, considering the high heritability coefficients. In this respect, heritability for disease-related variables provides economic and ecological gains.…”

Section: Meaning For Variability To Resistance In Half-sib Familiesmentioning

confidence: 99%

Prospection of genotypes resistant to black spot in half‐sib families of papaya

et al. 2021

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Papaya (Carica papaya L.) breeding is a complex task; furthermore, Carica papaya has a sexual chromosome and is difficult to make crosses. One of the most critical papaya crop diseases is black spot, which is caused by Asperisporium caricae (Speg.) MaublSince . Therefore, we used half-sib families to combine genetic gains on the yield and resistance traits to papaya black spot. In this scenario, the present study proposed to select papaya genotypes more resistant to black spot from half-sib families.Five parents with superior attributes related to black spot resistance were pollinated with a pollen mixture from five parents considered "elite" for agronomic traits, thus generating five half-sib families. The half-sib families were evaluated for black spot resistance in a greenhouse with two control cultivars ('Golden' and 'Maradol'), for 75 d, at 15-d intervals, totaling five evaluations. The families exhibited genetic variability for all traits associated with disease resistance, surpassing even the Golden and Maradol controls. The traits associated with severity by papaya black spot are more efficient to distinguish resistance genotypes using principal components analysis, like mean incidence of black spot (MSBS) (cosš = 0.794) and area under the disease progress curve (AUDPC) (cosš = 0.697). The recommended progeny for resistance to black spot are M-1.4, M-1.5, M-3.1, M-3.3, M-2.5, and M-4.5, as they showed lower values of mean severity of black spot, MIBS, and AUDPC. These progenies from half-sib families overcame the resistant control genotype Maradol as potential to combining resistance to papaya black spot with superior agronomic traits. INTRODUCTIONBlack spot, caused by the fungus Asperisporium caricae (Speg.) Maubl, is a disease of high economic relevance for the papaya crop (Carica papaya L.) worldwide. The disease Abbreviations: AUDPC, area under the disease progress curve; MIBS, mean incidence of black spot; MSBS, mean severity of black spot.

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Section: Meaning For Variability To Resistance In Half-sib Familiesmentioning

confidence: 99%

Prospection of genotypes resistant to black spot in half‐sib families of papaya

et al. 2021

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“…Literature reports show the efficiency of recurrent selection in various crops like common corn, popcorn, and Passiflora (Rangel et al, 2011;Ribeiro et al, 2012;Freitas Júnior et al, 2013). Recently, significant gains were also observed in the papaya crop (Moreira et al, 2018).…”

Section: Recurrent Selectionmentioning

confidence: 99%

Twenty-Two-Year Papaya Breeding Program: From Breeding Strategy Establishment to Cultivar Development

Pereira¹,

Poltronieri²,

Pereira³

et al. 2020

FPBJ

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“…Thus, the genetic resistance to diseases, the adaptation and the rusticity of papaya appear as sustainable alternatives for the control of this phytosanitary problem (Oliveira et al 2010). Different experimental techniques, genetic designs and sophisticated tools are being explored by breeding programs to expand the genetic base and/or explore the existing variability in the genus Carica (Serrano and Cattaneo 2010;Moreira et al, 2018;Pereira et al, 2019a).…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the improvement for resistance to phoma spot and black spot, the study is concentrated on two types of studies: a) introduction, evaluation, and disclosure of resistant accesses (Dianese et al, 2007;Vivas et al , 2010a;2012b;Poltronieri et al, 2019); and b) evaluation of combinatorial capacity and selection of families or superior hybrids (Vivas et al, 2011;2012a;2013a, b, c;2014a, b, c;2016;Poltronieri et al, 2017;Moreira et al, 2018;Pirovani et al, 2018;Moraes et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The mixed model can be used, both for the versatility of the non-mandatory experimental design, and the precise and impartial predictive power over genetic responses from population samples. Even so, the REML/BLUP procedure is incipient in the improvement of papaya (Pinto et al, 2013;Ramos et al, 2014;Cardoso et al, 2017;Moreira et al, 2018;Moreira et al, 2019;Cortes et al, 2019;Santa-Catarina et al 2020a, b) mainly in terms of disease resistance characteristics (Vivas et al, 2014b;Moreira et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Selection for papaya resistance to multiple diseases in a base population of recurrent selection

et al. 2021

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Selection for papaya resistance to multiple diseases in a base population of recurrent selectionABSTRACT: Papaya has a narrow genetic base concerning disease resistance, with few genetically distinct cultivars for planting in the world. Losses in crop production caused by fungal and viral diseases, added to the absence of resistant cultivars available to producers, have reduced the competitiveness of crops. Therefore, this study aimed to estimate the direct and combined genetic gains in the base population of the recurrent papaya selection and to indicate promising individuals for resistance to phoma spot and black spot. The population used in this study originated from the crossing of dioecious, female individuals and holders of a gene pool for resistance to phoma spot and black spot.These were crossed with elite individuals with a gene pool for production traits and fruit quality. The experiment was carried out without an experimental design, containing one plant per plot. Three measurements were taken on 255 individuals for five traits of disease resistance, being: four associated with black spot (incidence and severity on the leaf and fruit) and one associated with phoma spot (severity on the leaf). With the observations obtained, the REML/BLUP procedure was performed to estimate the temporary and permanent environmental effects. Such values were used to know the genetic parameters of the population and to elaborate a combined selection index, as well as to compare the gains with the direct selection. The results indicate low repeatability for the traits and that the gains obtained from the use of the combined selection index better rank the genotypes in comparison to the gains obtained by direct selection.

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Intrapopulation recurrent selection by mixed models in papaya of the formosa group

Cited by 4 publications

References 12 publications

Prospection of genotypes resistant to black spot in half‐sib families of papaya

Prospection of genotypes resistant to black spot in half‐sib families of papaya

Twenty-Two-Year Papaya Breeding Program: From Breeding Strategy Establishment to Cultivar Development

Selection for papaya resistance to multiple diseases in a base population of recurrent selection

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