Meiotic irregularities in hexaploid triticale (X triticosecale wittmack): variability analysis.
1991
Manero de Zumelzu D | Ordonez A. | Maich R. | Torres L.
Hexaploid triticale heterogeneity with meiotic irregularities is well known. The objective of this study was to assay genetic variability at two different levels: varietal and intravarietal. Varieties studied during the two-year period 1985/86 were: Don Frank (DF), Cachirulo (C), Jenkins TA 203 (J), Don Santiago (DS) and Rosner (R). Study index was the number of healthy microspores as compared with micronuclei. It was found that DF, C and J were cytologically stable. During three years, 1987-89, ten lines for each variety (DF and J) were assayed for different and opposite cytologic traits. In addition to these cytologic variables, the number of seeds per spike and the main spike were tested. Variance assay for cytologic index of these lines revealed significant differences only for DF. A significant and positive correlation between cytologic variation and the number of seeds per spike was observed.
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