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Tetraploidization in citrus rootstocks : effect of genetic constitution and environment in chromosome duplication

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Tetraploidization in citrus rootstocks : effect of genetic constitution and environment in chromosome duplication

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Título Tetraploidization in citrus rootstocks : effect of genetic constitution and environment in chromosome duplication
Autor Guerra, Divanilde
Schifino-Wittmann, Maria Teresa
Schwarz, Sergio Francisco
Weiler, Roberto Luis
Dahmer, Nair
Souza, Paulo Vitor Dutra de
Abstract The objective of this study was to identify polyploid plants from citrus rootstocks and to evaluate the influence of the genetic constitution and of the environment on the frequency of chromosome duplication. Populations obtained from rootstock seeds of Trifoliata [Poncirus trifoliate (L.) Raf], citrumelo ‘Swingle’ [C. paradise Macf. × P. trifoliate], citrange ‘Troyer’ [C. sinensis (L.) Osb. x P. trifoliate] and citranges Fepagro ‘C13’, ‘C37’ and ‘C41’ [C. sinensis (L.) Osb. cv. Pêra x P. trifoliata] were evaluated under field and greenhouse conditions. Flow cytometry analysis of 415 field plants and 435 greenhouse plants identified seven (1.69%) and 29 (6.67%) tetraploids, respectively. Differences in the number of tetraploid plants among genotypes and locations were observed in field progenies of ‘C 37’ (2.12%) and ‘C 13’ (2.04%) and in greenhouse progenies of ‘C 13’ (15.52%) and ‘C 37’ (6%). The frequency of autotetraploidization events in citrus rootstocks is common and appears to be associated to genetic constitution and environmental conditions.
Contido em Crop Breeding and Applied Biotechnology, Viçosa. Vol. 16, n.1 (jan./mar. 2016), p. 35-41
Assunto Citros
Cultivo protegido
Genetica vegetal
[en] Citrus
[en] Polyploids
[en] Protected environment
[en] Thermal amplitude
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/147459
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