Table 2 The comparison of chromosome distributions of each repeat sequence among four subspecies. Chromosome distributions of each repeat sequence in Medicago sativa ssp. sativa were summarized from Yu et al. [33]
Probes | ssp. caerulea (PI 464715) | ssp. sativa (Zhongmu No. 1) | Diploid ssp. falcata (PI 631808) | Tetraploid ssp. falcata (XiaNH-072X-824) |
|---|---|---|---|---|
18S–26S | 1 (secondary constriction) | 2 (secondary constriction) | 1 (secondary constriction) | 2 (secondary constriction) |
5S | 2 (near centromeric) | 4 (near centromeric) | 2 (near centromeric and interstitial region) | 4 (near centromeric and interstitial region) |
MsCR-1 | 14 (pericentromeric) | 30–32 (pericentromeric) | 16 (pericentromeric) | 30–32 (pericentromeric) |
MsCR-2 | 8 (pericentromeric) | 15 (pericentromeric) | 10 (pericentromeric) | 16–17 (pericentromeric) |
MsCR-3 | 6 (pericentromeric) | 16 (pericentromeric) | 0–1 (pericentromeric) | 7–8 (pericentromeric) |
MsCR-4 | 10 (pericentromeric) | 17 (pericentromeric) | 9 (pericentromeric) | 18 (pericentromeric) |
MsCR-5 | 9 (pericentromeric) | 19 (pericentromeric) | 8 (pericentromeric) | 16–17 (pericentromeric) |
MsTR-1 | 12–13 (subtelomeric) | 24–26 (subtelomeric) | 1 (subtelomeric) | 17 (subtelomeric) |
clone 65 | 12–13 (subtelomeric) | 26 (subtelomeric) | 1 (subtelomeric) | 13 (subtelomeric) |
clone 74 | 12–13 (subtelomeric) | 26 (subtelomeric) | 1 (subtelomeric) | 17 (subtelomeric) |
E180 | 16 (multiple distribution) | 30–32 (multiple distribution) | 10–11 (mainly on pericentromeric) | 23–24 (multiple distribution) |
clone 68 | 15 (multiple distribution) | 28 (multiple distribution) | 16 (mainly on pericentromeric) | 29 (multiple distribution) |
clone 87 | 14 (multiple distribution) | 32 (multiple distribution) | 16 (mainly on pericentromeric) | 32 (multiple distribution) |