Papaya (Carica papaya L.) S1 family recurrent selection: Opportunities and selection alternatives from the base population

Santa-Catarina, Renato; Pereira, Messias Gonzaga; Vettorazzi, Júlio Cesar Fiorio; Cortes, Diego Fernando Marmolejo; Poltronieri, Tathianne Pastana de Sousa; Azevedo, Alinne Oliveira Nunes; Moreira, Nádia Fernandes; Miranda, Daniel Pereira; Moraes, Ramon de; Pirovani, Adriana Azevedo Vimercati; Ramos, Helaine Christine Cancela; Vivas, Marcelo; Viana, Alexandre Pío

doi:10.1016/j.scienta.2019.108848

Cited by 14 publications

(7 citation statements)

References 28 publications

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Section: Methodsmentioning

confidence: 99%

“…In this way, recombination removes the allele with male plants. The only method to remove male allele is to use hermaphrodite plants to pollinate female plants; superior parents have this allele, but dioecious parents do not (Santa Catarina et al, 2020) For the crosses, 10 plants of each of the five dioecious progenies were planted at the rate of three plants per hole. After the male plants were thinned, a total of 50 plants with female flowers remained.…”

Section: Plant Materialsmentioning

confidence: 99%

“…Considering one's cultivation cycle and restricted genetic basis, the strategy on half‐sib families is an opportunity to optimize resources, such as those recently developed by Santa Catarina et al. (2020).…”

Section: Introductionmentioning

confidence: 99%

“…Papaya breeding generating half-sib families demands less experimental area, water, fertilizers, and specialists to make combinations under plot size than full-sib families. Considering one's cultivation cycle and restricted genetic basis, the strategy on half-sib families is an opportunity to optimize resources, such as those recently developed by Santa Catarina et al (2020).…”

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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: Methodsmentioning

confidence: 99%

Section: Plant Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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

et al. 2021

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“…For papaya, different populations were developed and also submitted to and evaluated through some breeding method, such as the selection of genotypes from backcrossing populations for sexual conversion in papaya (Ramos et al 2014, the selection of genotypes from a bi-parental segregating population (Cortes et al 2018) and the development of the segregating population through recombination between contrasting genotypes for fruit yield and quality and for disease resistance (Santa-Catarina et al 2020a, Santa-Catarina et al 2020b.…”

Section: Introductionmentioning

confidence: 99%

Recurrent selection in papaya: An effective strategy for the continuous development of new cultivars

Pereira

Santa-Catarina

2021

Crop Breed. Appl. Biotechnol.

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Part of the success of a breeding program depends on the composition of the base population. Superior genotypes and unimproved dioecious varieties are sources of genes for traits of interest and excellent options for the formation of segregating populations. Here we describe the first cycle of recurrent selection (RS) in papaya and propose an effective strategy, unprecedented in the crop, to generate variability and new cultivars. Initially, the RS base population (UCP-C0) was developed with wide variability. Subsequently, 196 S 1 progenies were obtained, evaluated in a trial, and the superior 40 S 1 progenies were recombined. Among the traits of the selected progenies, high fruit yield (producing two to five fruits per axil) stands out. The S 1 progenies were recombined and their seed bulk corresponds to the base population for the second cycle (UCP-C1). The results of the first cycle demonstrate the genetic potential of this population for the development of superior cultivars, and the breeding strategy applied is promising.

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