Publications

@article{Ribeiro2021,

title = {‘Tropical Sunki’ mandarin and hybrid citrus rootstocks under ‘Pera’ sweet orange in cohesive soil and As climate without irrigation},

author = {Lucas Oliveira Ribeiro and Danilo Pereira Costa and Carlos Alberto Silva Ledo and Luciana Marques Carvalho and Hélio Wilson Lemos Carvalho and Walter Dos Santos Soares Filho and Eduardo Augusto Girardi},

url = {http://www.scielo.br/j/brag/a/HMyzwL8xx5PLGJfhdXkGhxM/?lang=en},

doi = {10.1590/1678-4499.20200407},

issn = {0006-8705},

year  = {2021},

date = {2021-01-01},

journal = {Bragantia},

volume = {80},

pages = {1-14},

publisher = {Instituto Agronômico de Campinas},

abstract = {ABSTRACT The search for alternative rootstocks to the ‘Rangpur’ lime tree is a challenge to the sustainability of citrus in the Tabuleiros Costeiros (Coastal Tablelands) of Northeastern Brazil. New varieties should meet high drought tolerance with water deficit, cohesive soils, resistance to citrus diseases and inducing high production of fruit. In this work, the performance of ‘Pera’ sweet orange was evaluated on ‘Tropical Sunki’ mandarin and 27 hybrid citrus rootstocks in Umbaúba, Sergipe. A local selection of the ‘Rangpur’ lime was the control. Planting was in 2013 at tree spacing of 6.0 × 3.0 m, without irrigation. Tree size, fruit yield and quality, tree survival rate and graft-compatibility were assessed until 2019. Experimental design was completely randomized blocks with 29 treatments, three replicates and four plants in the plot. Two selection indices were applied to the data to assist in decision making. The ‘Tropical Sunki’ mandarin induced similar cumulative fruit yield in relation to the ‘Rangpur’ lime, suggesting a good drought tolerance of the former rootstock. The TSKC × (LCR × TR) - 073 induced slightly lower productivity, compensated by higher productive efficiency and higher concentration of soluble solids, whereas LCR × TR - 001 and HTR - 166 were highly efficient dwarfing rootstocks. The multiplicative and the rank sum indices showed high correlation, both classifying ‘Tropical Sunki’ mandarin, ‘Santa Cruz Rangpur’ lime, LVK × LCR - 010 and - 038, HTR - 127, in addition to the three aforementioned hybrids, as superior to the local selection of ‘Rangpur’ lime.},

keywords = {Citrus ×sinensis, Plant breeding, Poncirus trifoliata, rainfed cultivation, selection index},

pubstate = {published},

tppubtype = {article}

}

@article{Santana2019,

title = {Reaction to drought stress of citrus progenies with potential use for rootstocks development},

author = {Lizziane Gomes Leal Santana and Edson Santos Souza and Carlos Alberto Silva Ledo and Orlando Sampaio Passos and Mauricio Antônio Coelho Filho and Abelmon Silva Gesteira and Walter Santos Soares Filho},

url = {https://link.springer.com/article/10.1007/s40415-019-00558-7},

doi = {10.1007/S40415-019-00558-7/METRICS},

issn = {18069959},

year  = {2019},

date = {2019-01-01},

journal = {Revista Brasileira de Botanica},

volume = {42},

issue = {4},

pages = {591-599},

publisher = {Springer},

abstract = {The objective of this study was to evaluate citrus progenies reaction to drought stress and shoot emission capacity in order to identify those with potential for generating hybrids that can be used as rootstocks, mainly in the Coastal Tablelands of the Brazilian Northeast, where the rainfall distribution does not meet the water requirements for citrus production throughout the year. The Citrus Breeding Program of Embrapa Cassava and Fruits conducted controlled crossings having as female parents the ‘Rangpur Santa Cruz’ lime (RSCL) and the ‘Sunki of Florida’ mandarin (SFM), and as male parents, besides this mandarin, the ‘Indio’ (IDC) and ‘Riverside’ (RSC) citrandarins, ‘Thomasville’ citrangequat (THOM), ‘Swingle’ citrumelo (SWC), ‘Argentina’ citrange (AGC) and ‘Benecke’ trifoliate orange (BKTO). The hybrids generated were visually evaluated in the period from 2011 to 2014 for drought stress and water use capacity, on the basis, respectively, of leaf curling, evaluated at the end of periods of intense drought stress, and shoot emission, determined immediately after the occurrence of rains following those intense stress periods. The hybrids of RSCL were less sensitive to drought stress, and the SFM mandarin generated hybrids with good water use, due to their good shoot emission capacity in response to water deficit. This is an indication of the capability of this mandarin to produce hybrids with good rehydration ability.},

keywords = {Citrus spp, hybridization, Plant breeding, Poncirus trifoliata},

pubstate = {published},

tppubtype = {article}

}

@article{Almeida2018,

title = {Water deficit increases the frequency of hybrid citrus with polyembryonic female parents},

author = {Lucas Aragão Hora Almeida and Dayse Drielly Souza Santana-Vieira and Nayara Almeida Santos and Ivan Schuster and Walter Santos Soares Filho and Maurício Antônio Coelho Filho and Abelmon Silva Gesteira},

url = {http://www.scielo.br/j/cbab/a/xDqvSnnrPRKB35CCNQ5N6Rw/?lang=en},

doi = {10.1590/1984-70332018V18N1A7},

issn = {1518-7853},

year  = {2018},

date = {2018-01-01},

journal = {Crop Breeding and Applied Biotechnology},

volume = {18},

issue = {1},

pages = {47-54},

publisher = {Crop Breeding and Applied Biotechnology},

abstract = {Abstract The aim of this study was to develop a methodology that uses water deficit induction to increase the frequency of hybrids in Citrus varieties that have a high and an intermediate level of polyembryony, respectively. The experiment examined the ‘Sunki Tropical’ mandarin and ‘Rangpur Santa Cruz’ lime genotypes at three water stress intensities: 20, 40 and 100% of the pot capacity (PC). The generated fruits were harvested, and the seeds were counted. After germination, the number of nucellar and hybrid seedlings was determined. For ‘Rangpur Santa Cruz’ lime genotype, the highest hybrid frequency generated was 64.2%, which occurred at a PC of 40% and exceeded by 12% that occurring at a PC of 100%. For ‘Sunki Tropical’ mandarin, the highest observed hybrid frequency was 21.75%, which occurred at a PC of 20% and was more than double the hybrid frequency of 8.57% observed at 100% of the PC.},

keywords = {apomixis, Citrus spp, drought, Plant breeding, rootstock},

pubstate = {published},

tppubtype = {article}

}

@article{Santana2018,

title = {Vigor and mortality of citrus progenies with potential use as rootstocks},

author = {Lizziane Gomes Leal Santana and Edson Santos Souza and Orlando Sampaio Passos and Abelmon Silva Gesteira and Carlos Alberto Silva Ledo and Walter Santos Soares Filho},

url = {http://www.scielo.br/j/sa/a/3TCQXpPmGLd6qcH4TWZ6tzP/?lang=en},

doi = {10.1590/1678-992X-2016-0455},

issn = {1678-992X},

year  = {2018},

date = {2018-01-01},

journal = {Scientia Agricola},

volume = {75},

issue = {4},

pages = {339-345},

publisher = {Escola Superior de Agricultura "Luiz de Queiroz"},

abstract = {ABSTRACT: Rootstocks influence certain characteristics of the scion, such as vigor, fruit yield and quality, and tolerance to biotic and abiotic factors. In conventional citrus breeding programs, hybridization is the main method used for obtaining rootstock varieties. Between Sept and Oct 2006, controlled pollinations were carried out resulting in nine progenies, totaling 461 hybrid seedlings. The female parents were the ‘Santa Cruz Rangpur’ lime (SCRL) and the ‘Sunki of Florida’ mandarin (SFM), while the male parents, in addition to this mandarin, were the ‘Indio’ and ‘Riverside’ citrandarins, the ‘Thomasville’ citrangequat (THOM), the ‘Swingle’ citrumelo, the ‘Argentina’ citrange (AGC) and the ‘Benecke’ trifoliate orange (BKTO). Fruit setting rates of these crosses were measured and the hybrids generated were planted in the field in 2008 and evaluated from 2010 to 2014, for the variables of plant mortality, visual vigor, plant height and trunk diameter. The descriptive statistics mean, variation range, coefficient of variation and Pearson skewness coefficient were calculated. Data were submitted to analysis of variance and the means of the treatments were grouped by the Scott-Knott test, both at 5 % significance. The progenies, having the ‘Sunki’ mandarin as the female parent, presented higher fruit setting rates and lower plant mortality rates than those obtained from the female parent ‘Rangpur’ lime, while zero plant mortality was observed in the SFM × BKTO cross. The crosses SCRL × SFM, SFM × BKTO, SFM × AGC and SFM × THOM have the potential to generate vigorous hybrids, resulting in rootstock varieties adapted to the landscape unit of Coastal Tableland.},

keywords = {Citrus spp., hybridization, Plant breeding, Poncirus trifoliata},

pubstate = {published},

tppubtype = {article}

}