Table 1 Mean chiasma frequency for chromosomes 1 and 2 in four S. tuberosum varieties.
From: Varietal variation and chromosome behaviour during meiosis in Solanum tuberosum
Variety | Chiasma frequency | Chromosome 1 (4×/2×) | Chromosome 2 (4×/2×) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Short | Long | Total | n | Short | Long | Total | n | ||
Cara (4×) | Overall | 1.11 (2.2) | 1.96 (2.0) | 3.07 (2.1) | 27 | 0.48 (2.7) | 2.00 (2.1) | 2.48 (2.2) | 27 |
Per bivalent | 0.36 (0.7) | 0.96 (1.0) | 1.32 (0.9) | 14 | 0.10 (0.6) | 1.00 (1.0) | 1.10 (1.0) | 20 | |
Per multivalent | 1.54 | 2.00 | 3.54 | 13 | 1.29 | 2.00 | 3.29 | 7 | |
Per chromosome | 0.28 (1.1) | 0.49 (1.0) | 0.77 (1.0) | 27 | 0.12 (1.3) | 0.50 (1.0) | 0.62 (1.1) | 27 | |
Sante (4×) | Overall | 0.62 (1.2) | 1.97 (2.0) | 2.59 (1.8) | 71 | 0.21 (1.2) | 1.92 (2.0) | 2.13 (1.9) | 71 |
Per bivalent | 0.23 (0.5) | 0.99 (1.0) | 1.22 (0.8) | 59 | 0.03 (0.1) | 1.00 (1.0) | 1.03 (0.9) | 60 | |
Per multivalent | 1.42 | 1.91 | 3.33 | 12 | 1.20 | 1.50 | 2.70 | 10 | |
Per chromosome | 0.15 (0.6) | 0.49 (1.0) | 0.65 (0.9) | 71 | 0.05 (0.6) | 0.48 (1.0) | 0.53 (0.9) | 71 | |
Maris Peer (4×) | Overall | 0.94 (1.9) | 1.92 (2.0) | 2.87 (2.0) | 305 | 0.40 (2.2) | 1.93 (2.0) | 2.32 (2.0) | 305 |
Per bivalent | 0.32 (0.6) | 0.97 (1.0) | 1.29 (0.9) | 178 | 0.04 (0.2) | 0.97 (1.0) | 1.02 (0.9) | 208 | |
Per multivalent | 1.35 | 1.93 | 3.28 | 126 | 1.15 | 1.98 | 3.11 | 90 | |
Per chromosome | 0.24 (1.0) | 0.48 (1.0) | 0.72 (1.0) | 305 | 0.10 (1.1) | 0.48 (1.0) | 0.58 (1.0) | 305 | |
Scapa (2×) | Overall (per bivalent) | 0.50 | 0.97 | 1.47 | 236 | 0.18 | 0.97 | 1.15 | 236 |
Per chromosome | 0.25 | 0.49 | 0.74 | 236 | 0.09 | 0.49 | 0.57 | 236 | |
