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Identification of radiation induced mutants of cassava (manihot esculenta crantz) using morphological and physicochemical descriptors1

Tofino, Adriana and Cabal, Diana and Sánchez, Teresa and Ceballos, Hernán (2012) Identification of radiation induced mutants of cassava (manihot esculenta crantz) using morphological and physicochemical descriptors1. Agronomía Colombiana; Vol. 29, núm. 2 (2011); 179-188 Agronomía Colombiana; Vol. 29, núm. 2 (2011); 179-188 2357-3732 0120-9965 .

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URL oficial: http://revistas.unal.edu.co/index.php/agrocol/arti...

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For mutants of starch and other desirable traits of interest in cassava, we evaluated the physical-chemical morphology of the root and paste in inbred populations of six M2 families, derived from irradiated seeds. 1,097 plants were established, 829 of Gamma treatment and 268 of neutrons. In the morphological description, most chimeras recorded in M1 were identified except hermaphrodite flowers and bark of different colors on the same plant, new abnormalities in M2 were found, such as root without suberification, no anthesis, early flowering, meristems and changes in the supply-demand relationship. However, mortality, reduced vigor, yield and anthesis loss have also been identified as effects of inbreeding. Simple techniques such as optical microscopy and iodine staining were effective for the identification of mutants of the granule and the results were confirmed with electron microscopy analysis and pulp properties, except in mutant granule hole, in which no abnormalities of the granule were correlated with significant variations in the paste. However, Pearson correlations associated the hot paste viscosity with consistency and reorganization. Variability was found in the granule characteristics and properties of the paste between years, suggesting significant influence of genotype-environment interaction. Similarly, there were differences in paste properties associated with the type of radiation. In addition, promising mutants were identified with post-harvest physiological deterioration tolerance associated mainly to gamma.

Tipo de documento:Artículo - Article
Información adicional:© Facultad de Agronomía, Universidad Nacional de Colombia Se autoriza la reproducción y citación del material que aparece en la revista, siempre y cuando se indique de manera explícita: nombre de la revista, nombre del autor(es), año, volumen, número y páginas del artículo fuente. Las ideas y afirmaciones consignadas por los autores están bajo su responsabilidad y no interpretan necesariamente las opiniones y políticas de la Universidad Nacional de Colombia. La mención de productos o firmas comerciales en la revista no implica una recomendación o apoyo por parte de la Universidad ni de la Facultad; el uso de tales productos debe ceñirse a las recomendaciones de las etiquetas.
Palabras clave:inbreeding, optical microscopy, viscosity of the starch, root quality, morphological, mutagenesis.
Unidad administrativa:Revistas electrónicas UN > Agronomía Colombiana
Código ID:30243
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :30 Junio 2014 10:01
Ultima modificación:18 Agosto 2014 18:59
Ultima modificación:18 Agosto 2014 18:59
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