Table 3. A comparison of the karyotypic characteristics of S. oleracea L. Mazeran and S. tetrandra Stev. PI 647859.
Chromosome No. | Centromere Position | Relative Length (%) | Arm Ratioa | 45Sb | 5Sb | Satelliteb |
---|---|---|---|---|---|---|
S. oleracea L. Mazeran | ||||||
1 | Submedian | 19.6 | 1.73 | |||
2 | Submedian | 18.2 | 2.17 | S | L | |
3 | Subterminal | 17.3 | 3.44 | |||
4 | Subterminal | 16.0 | 3.36 | |||
5 | Subterminal | 14.5 | 3.11 | S | L | S |
6 | Subterminal | 14.4 | 6.61 | S | S | |
Total length | 100 | |||||
S. tetrandra Stev. PI 647859 | ||||||
X | Median | 18.1 | 1.29 | |||
Y | Median | 29.9 | 1.12 | |||
1 | Submedian | 16.7 | 2.39 | L | ||
2 | Submedian | 16.6 | 2.84 | |||
3 | Submedian | 14.8 | 1.85 | |||
4 | Submedian | 17.9 | 1.86 | S | L | S |
5 | Submedian | 15.9 | 2.46 | S | S | |
Total length (X) | 100 | |||||
Total length (Y) | 111.8 |
Autosomes of S. tetrandra Stev. PI 647859 were ordered according to their similarity in the possession of rDNA loci (45S and 5S) to those of S. oleracea L. Mazeran.
r-index (long/short arm length ratio; Levan et al. 1964).
Positions of the rDNA loci (45S and 5S) and the satellites on the short (S) or long (L) arm.