Fig. 2
The distribution of the total number of chromosomes in karyotypes and rDNA-bearing chromosomes in 44 plants of F3 generation of F. pratensis × L. perenne hybrid – in combination no. 3 (a), and in combination no. 4 (b). At the top of both graphs were shown results for parents – two F1 plants: F1 6-2A (♀), F1 6-7A (♂) and four plants of F2: two plants – F2 2A-15 (♀), F2 2A-5 (♂) for combination no. 3 of F3, and two plants – F2 2A-27 (♀), F2 2A-12 (♂) for combination no. 4 of F3. On the y-axis obtained rDNA patterns (Roman numerals) and their frequency in the brackets (Arabic numerals) were shown. On x-axis were presented: a total number of chromosomes, divided into two groups - Festuca and Lolium chromosomes, as well as the number of particular rDNA-bearing chromosomes