Comparison between diploid and tetraploid citrus rootstocks: morphological characterization and growth evaluation

Bragantia

Divanilde Guerra²  Maria Teresa Schifino Wittmann¹  Sergio Francisco Schwarz²  Paulo Vitor Dutra De Souza²  Mateus Pereira Gonzatto²  Roberto Luis Weiler¹ 

[1] ,Universidade Federal do Rio Grande do Sul (UFRGS) Faculdade de Agronomia Departamento de Horticultura e SilviculturaPorto Alegre RS ,Brasil

关键词: Citrus;    morphology;    leaf color;    height;    dwarfing;    Citrus;    morfologia;    cor da folha;    altura;    ananizante;   

DOI  :  10.1590/brag.2014.007

来源: SciELO

【 摘 要 】

Tetraploid citrus rootstocks may present different morphological characteristics and growth when compared to diploid ones. This worked aimed at comparing morphological characteristics and height growth of diploid and tetraploid plants from the rootstocks 'Swingle' citrumelo [C. paradise Macf. x Poncirus trifoliate (L.) Raf], citrange 'Troyer' (C. sinensis (L.) Osb. x P. trifoliata) and citranges 'Fepagro C 13' and 'Fepagro C 37' [C. sinensis cv. Pêra x P. trifoliata] during twelve months. Diploid (2n=18) and tetraploid (2n=36) plants originated from the same seed were identified, cultivated and evaluated every 45 days regarding color, height, petiole length, leaf length and central leaflet width. Significant differences were observed for the evaluated characteristics: the average of petiole length was 1.78 cm in the diploid and 0.99 cm in the tetraploid plants; the average of leaf length was 2.32 cm in the diploid and 2.95 cm in the tetraploid plants; the average of central leaflet width was 1.33 cm in the diploid and 1.69 cm in the tetraploid plants. Moreover, tetraploid plants had darker and thicker leaves than the diploid ones. Variation regarding height was observed and the diploid plants presented higher growth than the tetraploid ones. As tetraploid plants are smaller, have a slow height growth and wider and longer leaves.

【 授权许可】

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