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Phenological precocity and resistance to CABMV in passion fruit progenies of the third generation backcross [(P. edulis × P. cincinnata) × P. edulis]

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Abstract

Developing yellow passion fruit cultivars capable of combining precocity, productivity and resistance to Cowpea aphid-borne mosaic virus (CABMV) is essential to passiculture. The aim of the current study is to evaluate vegetative and reproductive precocity, as well as resistance to CABMV, in a population of third generation backcross (BC3) involving an interspecific hybrid (P. edulis x P. cincinnata) followed by three backcrosses with com P. edulis. Eight hundred and thirty-three (833) progenies, 22 BC3 families and 10 yellow passion fruit (controls) accessions were evaluated. Phenological stages were assessed based on the number of days after planting (DAP) when progenies presented primary, secondary and tertiary branches, flowers and fruits in these branches. CABMV severity was analyzed under field conditions based on a rating scale that ranged from 1 (resistant) to 4 (highly susceptible); values were converted into McKinney's disease index (DI%). Overall, BC3 families were superior to control treatments (P. edulis accession), since they presented greater precocity, productivity and resistance to CABMV. Based on CABMV’s classification, 34 progenies were considered resistant (DI from 0.0 to 14.81%) and 299 were moderately resistant (DI from 16.67 to 30.0%). Findings in the current study have shown that BC3.A, BC3.B and BC3.G families have potential to be used in breeding programs, since they showed more precocious vegetative and reproductive vigor, accumulated production higher than 70 fruits per plant and resistance to CABMV.

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Abbreviations

BC1:

First backcross generation

BC2:

Second backcross generation

BC3:

Third generation backcross

CABMV:

Cowpea aphid-borne mosaic virus

DAP:

Days after planting

DI:

Disease index

R:

Resistant

MR:

Moderately resistant

S:

Susceptible

HS:

Highly susceptible

IH:

Interespecific hibridization

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Acknowledgements

The authors thank the Fundação de Amparo à Pesquisa do Estado da Bahia for scholarship (I.S.S. – 632/2018) given to the first author. The Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for the post-doctoral scholarship the second author (L.K.S.L—PDJ 152109/2019-6) and also for financial support (O.N.J.—Process 421033/2018-5) and the research productivity fellowship (O.N.J.—PQ312774/2018-4) given to the fifth author. We also thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the postdoctoral research Grant (T.L.S – PNPD/UEFS 15950830814) given to the forth author. The Embrapa Mandioca e Fruticultura for providing plant material along with experimental, technical and financial support of Embrapa (Process 22.16.04.007.00.00).

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ONJ has framed and planned the research, as well as provided plant material and facilities for the experiments. ISS, SRS and LKSL have performed the experiments. ISS, ONJ and LKSL have performed data analysis. ISS and ONJ participated in data interpretation, manuscript writing and corrections. ONJ, LKSL and TLS participated in the correction and critical review of the article. All authors have read and approved the final version of the manuscript.

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Correspondence to Onildo Nunes de Jesus.

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The authors declare no conflicts of interest.

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dos Santos, I.S., Lima, L.K.S., Sampaio, S.R. et al. Phenological precocity and resistance to CABMV in passion fruit progenies of the third generation backcross [(P. edulis × P. cincinnata) × P. edulis]. Euphytica 217, 112 (2021). https://doi.org/10.1007/s10681-021-02842-8

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  • DOI: https://doi.org/10.1007/s10681-021-02842-8

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