Fenologia reprodutiva e qualidade das sementes de Cabralea canjerana (Vell.) Mart

Felippi, Marciele; Araújo, Maristela Machado; Longhi, Solon Jonas; Lúcio, Alessandro Dal’Col

doi:10.1590/0103-8478cr20130517

Cited by 4 publications

(4 citation statements)

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“…Seed germination is not uniform and ranges between 22 and 86%. In many cases, low percentage of seed germination can be attributed to differences in maturation of harvested fruits (Felippi et al, 2015). These factors limit seminal plantlet production of canjerana, demonstrating the need to carry out vegetative propagation studies.…”

Section: Introductionmentioning

confidence: 99%

Early selection of Cabralea canjerana for propagation by mini-cutting

Burin

Bisognin

Lencina

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to define an early selection strategy to identify Cabralea canjerana (Meliaceae) clones with high multiplication rate. A mini-garden of 109 clones of canjerana seedlings was established in a completely randomized design, in an acclimatized greenhouse. From seedlings, the mini-stumps and mini-cuttings were obtained. Mini-cuttings were collected at five different times, and the number of mini-cuttings per mini-stump, rooting percentage, and number of rooted mini-cuttings were quantified. The number of rooted mini-cuttings per mini-stump was the only trait that showed high correlation with the others. Five groups of clones based on the number of rooted mini-cuttings per mini-stump were separated using k-means clustering, and the genetic gain from selection and Pearson correlation were estimated. The selection of the two best groups in each evaluation period resulted in high genetic gains from selection for all evaluated traits. Early selection for the number of rooted mini-cuttings discarded 65% of the evaluated clones, which increases experimental precision in evaluations of traits associated with plantlet growth and quality. Early selection for the number of rooted mini-cuttings per mini-stump at different times allows the identification of Cabralea canjerana clones with high multiplication rate.

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Section: Introductionmentioning

confidence: 99%

Early selection of Cabralea canjerana for propagation by mini-cutting

Burin

Bisognin

Lencina

et al. 2018

Pesq. agropec. bras.

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“…Apesar de não possuir dormência, são intolerantes à perda de água e quando armazenadas apresentam curta longevidade, pois as sementes perdem rapidamente a viabilidade após a secagem (Carvalho, 2003). Além disso, a germinação é considerada lenta e muito variável, de 40 a 93% (Carvalho, 2003) e de 22 a 86% (Felippi et al, 2015). Sementes recalcitrantes e de germinação lenta limitam a oferta contínua de mudas, necessária para a implantação de novos povoamentos, justificando o uso da propagação vegetativa para a produção de mudas, especialmente pela miniestaquia.…”

Section: Introductionunclassified

Enraizamento de miniestacas em diferentes épocas de coleta para a seleção de clones de canjerana

Burin

Bisognin

Lencina

et al. 2018

Agraria

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RESUMO:O objetivo deste trabalho foi estudar o efeito de época de coleta no enraizamento de miniestacas para desenvolver uma estratégia de seleção que maximize o ganho genético e facilite a identificação de clones de canjerana com potencial para a propagação vegetativa. Um minijardim clonal foi estabelecido com 22 clones de canjerana, no qual realizaram-se coletas de miniestacas em três épocas durante o período de maior crescimento vegetativo. Foram avaliadas as percentagens de sobrevivência, enraizamento e brotação de miniestacas, o número e comprimento de raízes e brotos e o número de miniestacas enraizadas por minicepa. Os clones foram agrupados pelo método não-hierárquico das k-médias para o número de miniestacas enraizadas em cada época de coleta. A identificação dos melhores clones foi realizada com base na soma de postos e estimado o ganho genético de seleção. A época de coleta das brotações afeta o enraizamento de miniestacas de canjerana. A seleção de clones de canjerana deve ser realizada com base no número de miniestacas enraizadas por minicepa durante todo o período de crescimento vegetativo.Palavras-chave: Cabralea canjerana; ganho genético; miniestaquia; sazonalidade Rooting of mini-cuttings in different collection times for the selection of canjerana clonesABSTRACT: The objective of this work was to study the effect of the collection time in rooting capability of mini-cuttings to develop a selection strategy to maximize genetic gain from selection and to facilitate the identification of canjerana clones with potential for vegetative propagation. A clonal mini-hedge was established with 22 canjerana clones and mini-cuttings were collected in three different times during the vegetative growth season. The percentages of survival, rooting and shooting, the number and length of roots and shoots and the number of rooted mini-cuttings per mini-stump were evaluated. The clones were clustered by the nonhierarchical k-means method for the number of rooted mini-cuttings in each collection time. Clone selection was based upon the sum of ranks and genetic gain from selection was estimated. The collection time of canjerana shoots affects the rooting capability of mini-cuttings. Selection of canjerana clones should be based upon the number of rooted mini-cuttings per mini-stump, during the whole season of vegetative growth.

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“…On the one hand, the overall mean of germination percentage of this study (94%) was similar to the germination mentioned by Carvalho (2003) (93%). On the other hand, when evaluating the germination of different matrices of C. canjerana with vermiculite substrate at 25 ºC, Felippi et al (2015a) obtained lower and non-uniform results, ranging from 22 to 86% of germination, according to each mother plant. In face of the results, the same authors highlight that the low quality of the seeds may be associated to the physiological maturity of each mother plant.…”

Section: Discussionmentioning

confidence: 92%

CARPOSEMINAL BIOMETRY AND GERMINATION OF Cabralea canjerana (Vell.) Mart.

Rickli-Horst

Duarte

Chirinzane

et al. 2017

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Cabralea canjerana is a species that has ecological and economic importance for the Southern Brazil. This study aimed to characterize the biometry of fruits and seeds as well as the C. canjerana germinative process submitted to different substrates and temperatures. The biometric characteristics of fruits and seeds were analyzed with the aid of digital caliper. In the germination test, the substrates blotting paper, sand and vermiculite, and the temperatures of 20, 25 and 30 ºC were used. The germination percentage, mean germination rate (MGR), mean germination time (MGT), synchronization index (SI), fresh mass (FS) and dry mass (DM) of seedlings were assessed. The highest germination percentages occurred for vermiculite at three temperatures, blotting paper at 25 °C and sand at 20 and 30 °C. There was seedling formation in all treatments. The use of the sand substrate and the temperatures of 25 and 30 °C provided lower mean values of MGT and SI and higher mean values of MGR. The highest DM occurred with sand at the temperature of 20 ºC. The biometric characteristics of fruits and seeds varied. We recommend the use of vermiculite at temperatures of 20, 25 and 30 ºC, blotting paper at 25 °C and sand at 20 and 30 °C for germination tests. Keywords: Meliaceae; native species; germination potential; temperature, substrate. Resumo:Biometria carpo seminal e germinação de Cabralea canjerana (Vell.) Mart. Cabralea canjerana é uma espécie que possui importância ecológica e econômica para o Sul do Brasil. Este estudo objetivou caracterizar a biometria de frutos e sementes, assim como o processo germinativo de C. canjerana submetido a diferentes substratos e temperaturas. Analisaram-se as características biométricas de frutos e sementes com auxílio de paquímetro digital. No teste de germinação, foram utilizados os substratos papel mata-borrão, areia e vermiculita e as temperaturas de 20, 25 e 30 ºC, avaliando-se a porcentagem de germinação, velocidade média de germinação (VMG), tempo médio de germinação (TMG), índice de sincronização (I), massa fresca (MF) e massa seca (MS) de plântulas. As maiores porcentagens de germinação ocorreram com vermiculita nas três temperaturas, papel mata-borrão a 25 °C e areia a 20 e 30 °C. Houve formação de plântulas em todos os tratamentos. O uso do substrato areia e das temperaturas de 25 e 30 ºC proporcionou menores médias de TMG e I e maiores médias de VMG. A maior MS ocorreu utilizando-se areia sob temperatura de 20 ºC. Ocorreu variação das características biométricas de frutos e sementes. Recomenda-se a utilização de vermiculita nas temperaturas de 20, 25 e 30 ºC, papel mata-borrão a 25 °C e areia a 20 e 30 °C para testes de germinação.

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Fenologia reprodutiva e qualidade das sementes de Cabralea canjerana (Vell.) Mart

Abstract: Fenologia reprodutiva e qualidade das sementes de Cabralea canjerana (Vell.)

Cited by 4 publications

References 4 publications

Early selection of Cabralea canjerana for propagation by mini-cutting

Early selection of Cabralea canjerana for propagation by mini-cutting

Enraizamento de miniestacas em diferentes épocas de coleta para a seleção de clones de canjerana

CARPOSEMINAL BIOMETRY AND GERMINATION OF Cabralea canjerana (Vell.) Mart.

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