Crossability of Euploid and Monosomic Triticum aestivum Lines with Different Ploidi Secale Cereale


Bulgarian Academy of Sciences, Institute of Plant Physiology and Genetics, BG - 1113 Sofia, Bulgaria


KUSSOVSKA, V., 2010. Crossability of euploid and monosomic Triticum aestivum lines with different ploidi Secale cereale. Bulg. J. Agric. Sci., 16: 669-672

The influence of wheat genotype, their 1D, 3D, 4D and 5B chromosomes and ploidy degree of rye on crossability were studied. Several cultivars (cv.) from Triticum aestivum L. (2n = 42) are included in the investigation: Chinese Spring (CS), its line with a mutation in Ph1 gene (CSph1), its monosomic lines by 1D, 3D, 4D and 5B chromosomes, Bezostaya 1 (B1), Rannaya 12 (R12) and their monosomic lines by 1D, 3D and 5B chromosomes.
From the Secale cereale L. the following rye inbred lines were included: two diploid inbred lines (2n=14) - Bulgarian Low Stem Rye (BLSR) and Lozen14 (L14); one tetraploid inbred line (2n = 28) - Vladimirovka (Vl.). The seed set depends on the wheat and rye parental genotypes, 1D, 3D and 5B wheat chromosomes and ploidy degree of rye. Chinese Spring cv. is characterized by the best crossability. The monosomy by 1D, 3D and 5B chromosomes in CS cv., causes decrease of the crossability with the three ryes inbred lines. The monosomy by 1D and 3D chromosomes decreases the crossability in B1 and R12 cvs. and the monosomy by 5B chromosome increases it. The rye ploidy level influences negatively the viability of the hybrids seeds. In the crosses with tetraploid rye were not obtained hybrids plants. Probably the reason is more in the higher genome and chromosome disbalance than in the crosses with the diploid rye.

Key words: crossability, genotypic effect, ploidy degree, viability of the hybrids seeds

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