Distinguishing A/A ^m chromosome substitutions in secondary tetraploid triticale strains with the complete A-genome

Sodkiewicz, Wojciech and Apolinarska, Barbara and Sodkiewicz, Teresa (2005) Distinguishing A/A ^m chromosome substitutions in secondary tetraploid triticale strains with the complete A-genome. Cereal Research Communications, 33 (2-3). pp. 447-453. ISSN 0133-3720

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Abstract

The aim of this work was to distinguish between chromosomes of A-genome of 6x-triticale and A ^m- -genome of T. monococcum and to evaluate the efficiency of distinguishing secondary tetraploid triticale lines varying in A/A ^m chromosome substitutions. These secondary tetraploid lines were developed by crossing of this hexaploid triticales with the synthetic allotetraploid T. monococcum/S. cereale (A ^m A ^m RR) as a male parent. The comparative C-banding showed that chromosomes of T. monococcum are less easily stained than are chromosomes of hexaploid triticale. Precise differential staining of tetraploid triticale lines with complete A genome distinguished chromosomes originating from A ^m -genome of primary A ^m A ^m RR allotetraploid and those substituted from A-genome of 6x-triticale. Seventeen different chromosome constitutions of tetraploid triticale with complete A-genome were identified. The assessed substitutions showed close linkage with several phenotypic traits. Chromosomes 2A, 4A, 5A and 6A participated in substitutions with significantly higher frequency than other chromosomes of A-genome.

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