Cytological Disorders in Hexaploid Triticale (Triticosecale Wittmack): Association and stability between two indexes

抄録

Cytologic heterogeneity of triticale (Triticosecale Wittmack) has been well studied at both varietal and intravarietal levels. The aim of this work was to determine the degree of association between meiotic index (MI) or percentage of normal tetrades and post-tetrades index (PTI), namely percentage of abnormal microspores. Eight hexaploid triticale sublines from two different varieties, Don Frank (DF) and Jenkins TA 203 (J) were evaluated during two years. Statistical analysis showed a dissociation between indexes in J variety. PTI index would be most suitable for intravarietal selection based on cytological aspects.