Evaluación de caracteres componentes de biomasa para la identificación de variación somaclonal en Buffel grass

LÓPEZ COLOMBA, E.; GRIFFA, S.; RIBOTTA, A.; LANZA CASTELLI, S.; LUNA, C.; GRUNBERG, K.; BIDERBOST, E.

Huerta Grande, Córdoba

Jornada; I Reunión Conjunta de Sociedades de Biología de la Republica Argentina; 2007

Sociedad de Biología de Córdoba, Rosario, Buenos Aires, Tucumán y Cuyo

FIELD EvaLuaTION of COMPONENT traits OF BIOMASS PRODUCTION for the identification of somaclonal variants of Buffel grass López Colomba E., Griffa S., Ribotta A., Luna C., Grunberg K. Mroginski L. Biderbost E. Instituto de Fitopatología y Fisiología Vegetal (INTA). E-mail: elianalopezcolomba@yahoo.com.ar   Fresh weight (PF) and dry weight (PS) are main traits of biomass production, of agronomic interest to evaluate of new genotypes. In order to determinate the utility of these morphological traits to discriminate somaclonal variants of Buffel grass, PF, PS and  PF-(PS/PF) were compared to the control. The plant material used was offsprings of plants obtained from embryogenic calli (CE) exposed to different concentrations of NaCl (S) and ethylmethanesulphonate (M). After two consecutive years in the field, S progenies showed PS and PF higher than the control lines. M progenies had lower PF, although, this difference was not significant respect to the control. M progenies showed significant diferences in relationship PF-(PS/PF) respect to control lines, whereas not statistically significant diference were observed in S progenies. Since, PF, PS and its relationship not allowed to discriminate between M, S offsprings and control lines, they do not constitute, by themselves, good discriminant markers. Summing up, PF, PS and PF-(PS/PF) should be used all together to evaluate somaclonal variants in Buffel grass.