Abstract
Eight advanced breeding lines of hexaploid winter triticale (× Triticosecale Wittmack) visually selected for high fertility and nonshrivelled seeds were examined for loss of rye chromosomes or their telomeric heterochromatin. The Giemsa C-banding patterns indicated that there were no rye chromosomes lost and that the telomeric heterochromatin normally found in the rye chromosomes was maintained in most of the lines. Similar to a recent report on European winter triticales, high fertility and nonshrivelled seed development of these winter triticale lines could not be associated with the absence of rye chromosomes or their telomeric heterochromatin. Such changes may not be a prerequisite for the improvement of these characteristics in winter triticale.
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