Caracterização agronômica e molecular de acessos de Citrus sunki do Banco de Germoplasma de Citros do Centro APTA Citros Sylvio Moreira

Schinor, Evandro Henrique; Siviero, Amauri; Cristofani–Yaly, Mariângela; Marengo, Samanta; Pompeu, Jorgino; Machado, Marcos Antônio

doi:10.5935/2236-3122.20110004

Cited by 4 publications

(4 citation statements)

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“…All citrandarins presented higher number of seeds compared to Sunki mandarin (Table 1), which low seed yield was also observed in the present work (5,3). The low Sunki seed yield is reported in literature (Schinor et al, 2011), as one of the limiting factors for the adoption of this rootstock.…”

Section: Resultsmentioning

confidence: 99%

Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds

et al. 2019

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Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance to drought; however, it is susceptible to several diseases, requiring the search for other rootstocks tolerant to factors limiting citrus cultivation. In addition, the Brazilian legislation stipulates that citrus seeds can only be commercialized with at least 50% germination rate. Thus, the aim of this work was to evaluate the physiological quality of seeds of seven citrus rootstocks. The following citrus fruits were harvested: Poncirus trifoliata, Sunki mandarin and their hybrids –citrandarins (70, 106, 254, 299 and 310). Fruit mass, diameter and height were measured. Seeds were extracted from fruits, counting the number of normal seeds (not aborted). Seeds were dried up to 20% water content and stored for 3, 6, 9 and 12 months. The physiological quality of seeds was evaluated before storage (time 0) up to 12 months of storage. The quality of Poncirus trifoliata, Sunki mandarin and citrandarins 70, 106, 254, 299 and 310 seeds was reduced during storage. However, their germination rate remained above 50%, evidencing that seeds of all rootstocks could be marketed until 12 months of storage. The new rootstocks tested have seeds with physiological quality compatible with their parents, in compliance with current legislation.

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Section: Resultsmentioning

confidence: 99%

Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds

et al. 2019

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“…Em relação ao número de sementes viáveis, os frutos do quadrante sudeste foram os que apresentaram maior média, no entanto, não diferindo das médias dos quadrantes nordeste e noroeste (Tabela 1). A média geral para os quadrantes foi de 4,13 sementes viáveis por fruto, e está de acordo com as médias encontradas por Araujo e Salibe (2002) e Schinor et al (2011), que também observaram um número reduzido de sementes em cultivares da tangerina 'Sunki', independentemente da posição dos frutos na planta. O número de sementes viáveis é uma característica muito importante, principalmente para a tangerineira 'Sunki', uma vez que seu uso se dá principalmente como portaenxerto, e estas são necessárias para a sua produção.…”

Section: Methodsunclassified

“…Schinor et al (2011) encontraram resultados superiores para cinco acessos de tangerina 'Sunki'. Para o pH dos frutos, as maiores médias foram observadas nos quadrantes sudeste, nordeste e noroeste (Tabela 2).…”

Section: Methodsunclassified

Caracterização física e química dos frutos nos diferentes quadrantes da planta e germinação de sementes do portaenxerto cítrico tangerineira ‘Sunki’

Souza¹,

Modesto²,

Leonel³

et al. 2015

Biosci. J.

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RESUMO:A tangerineira 'Sunki' apresenta grande relevância para a citricultura brasileira por apresentar importantes características para o melhoramento genético e por ser considerada um ótimo portaenxento. Neste contexto, objetivou-se com o presente trabalho estudar a caracterização dos frutos do portaenxerto cítrico 'Sunki', em função da posição dos mesmos na planta e também, avaliar a germinação de suas sementes. As características físicas avaliadas foram massa do fruto, diâmetros longitudinal e equatorial dos frutos, relação diâmetro longitudinal/diâmetro equatorial, número de gomos por frutos, massa de gomos e de casca e número de sementes viáveis por fruto. Quanto à caracterização química, foi avaliado acidez titulável, sólidos solúveis, "Ratio", pH e vitamina C. Para a avaliação dessas variáveis, os frutos foram obtidos dos quadrantes nordeste, sudoeste, noroeste e sudeste. Com relação à avaliação da germinação das sementes, foram utilizadas diferentes doses de ácido giberélico e Stimulate. As sementes, extraídas de frutos maduros, foram lavadas, secadas à sombra e armazenadas em BOD. Logo após, estas foram tratadas com biorreguladores por 24 horas. Depois da embebição, as sementes foram colocadas no germinador em papel germitest. Após o inicio do processo germinativo, as avaliações foram realizadas diariamente até o trigésimo quarto dia. Frutos da tangerineira 'Sunki' apresentam boa uniformidade quanto à posição dos frutos na copa; o uso de ácido giberélico e de bioestimulante é promissor para uso comercial na germinação de sementes desse portaenxerto.

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“…Biotechnological tools, including isoenzymatic and molecular markers, have been used to identify seedlings of zygotic origin in breeding programs and in citrus nurseries (ASHARI et al, 1988;ANDERSON et al, 1991;MACHADO, 1998;ANDRADE-RODRIGUEZ et al, 2004;ANDRADE et al, 2007). Molecular markers are also useful for the genetic certification of citrus varieties used as scions (NOVELLI et al, 2004(NOVELLI et al, , 2006MORAES FILHO et al, 2011;SUN et al, 2012;SANKAR et al, 2014) and as rootstocks (SHÄFER et al, 2004;SCHINOR et al, 2011). As an example, the use of microsatellite or simple sequence repeats molecular markers allowed 'IAC 2019Maria' to be genetically differentiated from 'Murcott IAC' tangor, which is used as a female parent in crosses with 'Pera IAC' sweet orange (CRISTOFANI-YALI, 2017).…”

Section: Characterization and Genetic Certificationmentioning

confidence: 99%

Advances in citrus propagation in Brazil

et al. 2019

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Citriculture is an important agricultural activity worldwide, occupying a relevant position in Brazil among fruit tree production for both the fresh fruit market and the processing industry for concentrated orange juice export. Recent advances in the country’s citrus nursery tree production system have been essential to guarantee the efficiency and competitiveness of Brazilian citriculture. The implementation of strict laws and regulations to produce trees in protected environments and improvements in production techniques for basic citrus propagation materials and nursery trees in São Paulo state has excluded the insect vectors of destructive diseases such as citrus variegated chlorosis and huanglongbing, making this an innovative reference system for citrus propagation around the globe. The main aspects of these advances are presented and discussed in this review, including advances in propagation techniques, scion and rootstock selection, genetic characterization and certification, tree size standards, cultural practices such as irrigation and fertilization for the production of citrus propagation materials and nursery trees, and nursery management tools.

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Caracterização agronômica e molecular de acessos de Citrus sunki do Banco de Germoplasma de Citros do Centro APTA Citros Sylvio Moreira

Cited by 4 publications

References 13 publications

Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds

Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds

Caracterização física e química dos frutos nos diferentes quadrantes da planta e germinação de sementes do portaenxerto cítrico tangerineira ‘Sunki’

Advances in citrus propagation in Brazil

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