Univariate and multivariate Statistical tools for in vitro conservation of citrus genotypes/Ferramentas estatisticas multivariadas para a conservacao in vitro de genotipos de citros

This study aimed to evaluate the influence of the growing environment on the in vitro conservation of citrus genotypes obtained from the Active Citrus Germplasm Bank of Embrapa Cassava and Fruit. The study used multivariate statistic tools in order to improve the efficiency in the analysis of the re...

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Published inActa scientiarum. Agronomy p. 129
Main Authors de Jesus da Silva de Carvalho, Mariane, Souza, Antonio da Silva, Santos, Emanuela Barbosa, Filho, Walter dos Santos Soares, Ledo, Carlos Alberto da Silva, Souza, Fernanda Vidigal Duarte
Format Journal Article
LanguageSpanish
Published Universidade Estadual de Maringa 01.01.2016
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Summary:This study aimed to evaluate the influence of the growing environment on the in vitro conservation of citrus genotypes obtained from the Active Citrus Germplasm Bank of Embrapa Cassava and Fruit. The study used multivariate statistic tools in order to improve the efficiency in the analysis of the results. Approximately 1-cm of length microcuttings from plantlets derived from ten genotypes previously cultured in vitro were inoculated in test tubes containing 20 mL of WPM culture medium supplemented with 25 g [L.sup.-1] sucrose, solidified with 7 g [L.sup.-1] agar and adjusted to a pH of 5.8, and maintained under three environmental conditions for 180 days. The experiment was carried out in a completely randomized design in a split-plot in the space, with 15 replications. The results indicate that the principal component analysis is an effective tool in studying the behavior of different genotypes conserved under different in vitro growing conditions. The growing conditions of 22 ± 1°C, a light intensity of 10 µmol [m.sup.-2][s.sup.-1] and a 12 hours photoperiod was the most adequate for reducing the growth of in vitro conserved plants, increasing the subculture time interval while keeping the plants healthy. Keywords: multivariate analysis of variance, partial correlation, principal component analysis, germplasm, Citrus spp. Este estudo teve por objetivo avaliar a influencia do ambiente de cultivo para a conservacao in vitro de genotipos de citros oriundos do Banco Ativo de Germoplasma da Embrapa Mandioca e Fruticultura. O estudo utilizou ferramentas estatisticas multivariadas a fim de melhorar a eficiencia na analise dos resultados. Microestacas de plantulas de dez genotipos previamente cultivadas in vitro, com aproximadamente 1 cm, foram inoculadas em tubos de ensaio com 20 mL do meio de cultura WPM suplementado com 25 g [L.sup.-1] de sacarose, solidificado com 7 g [L.sup.-1] de agar e pH ajustado em 5,8, e mantidas em tres ambientes de cultivo por 180 dias. O experimento foi instalado em um delineamento inteiramente casualizado em esquema de parcela subdividida no espaco, com 15 repeticoes. Os resultados indicam que a analise de componentes principais e uma ferramenta eficiente para estudar o comportamento de genotipos conservados em diferentes ambientes de cultivo in vitro. O ambiente de cultivo com 22 ± 1°C, intensidade luminosa de 10 µmol [m.sup.-2] [s.sup.-1] e 12h de fotoperiodo e o mais indicado para reduzir o crescimento das plantas conservadas in vitro, prolongando o tempo de subcultivo e mantendo as plantas sadias. Palavras-chave: analise de variancia multivariada, correlacao parcial, analise de componentes principais, germplasm, Citrus spp.
ISSN:1679-9275
1807-8621
DOI:10.4025/actasciagron.v38i1.26433