Meiotic Stability and Characteristics of Rye Genome and Productivity of Bulgarian Hexaploid Triticale Lines

J. STOINOVA
Institute of Genetics "Acad. D. Kostoff" Bulgarian Academy of Sciences, BG-1113 Sofia, Bulgaria

Abstract

STOINOVA J., 2006. Meiotic stability and characteristics of rye genome and productivity of Bulgarian hexaploid triticale lines. Bulg. J. Agric. Sci., 12: 13-18

The hexaploid triticale lines C1 and C2 were investigated. The lines are of high meiotic stability as 83.51 % - 91 .22% of the tetrads have no micronuclei and are highly productive. Plants of line C2 are characterized with long spike (10,62 cm), average number of spikelets (26.50) and average number of florets (97.80) while these of C1 - (9.61 cm ) long spike, (26.20) average number of spikelets and (92.92) average number of florets. The mean grain number per main spike varying from 49.83 to 52.08 and the mean mass from 2.06 to 2.41 g.
Differential staining analyses showed the presence of 14 rye chromosomes and no reduction in telomere heterochromatin content. Both lines possess all A- and B- wheat chromosomes in their genomes. Line C1 carries the dominant gene for spring type of development while C2 has the dominant gene for winter type of development.

Key words: triticale, meiotic stability, rye chromosomes, productivity