Cytological Study of Euploid and Monosomic Wheat-Rye Hybrids

Abstract

The influence of male and female genotypes, the effects of their interactions, the influence of ID, 3D, 4D and 5B chromosomes and the effects of their interaction were studied in 30 F1 wheat - rye euploid and aneuploid hybrids / 2n =28, 27, A B D R / concerning 7 morphological characters: heading date, common tillering productive tillering, culm length, last internode length, ear length and spikelet number per ear. F1 hybrids were obtained by crosses between four hexaploid cultivars Triticum aestivum L.2n=42: Chinese Spring /CS/, Mironovka 808 /M 808 /, Zlatka /Z1 /, Novostepnyachka / N /, as well as their monosomic lines by 1D, 3D, 4D and 5B chromosomes with two inbred lines Secale cereale L. 2n = 14 [Bulgarian Low Stem Rye /BLSR/ and Lozen 14 / L 14 / The morphological characters of the parental genotypes were as well studied. It was established that the parental genotypes influence all of the studied characters, while the effect of their interaction was observed in 14.3 % of the characters (ear length). The group of the monosomic hybrids on 3D chromosomes shows an influence different from the other hybrids for 42.9% of the characters ( heading date, ear length, spikelet number per ear); the hybrids group on 5B chromosome - 71.4 % from the characters (heading date, common and productive tillering, last internode length, ear length); the group of the euploid hybrids - 85.7% of the characters (do not show a difference on culm length).