Table 2.
Estimation of genome size in Ulmus species.
| Number | Species | 2Cy (pg) | 1Cxx (pg) | Number of Bases (Gb) | Subgenus |
|---|---|---|---|---|---|
| 1 | U. alata | 2.998–3.142 | 1.499–1.571 | 1.466–1.536 | Subg. Oreoptelea |
| 2 | U. americana 2x | 3.088–3.196 | 1.544–1.598 | 1.510–1.563 | Subg. Oreoptelea |
| 3 | U. americana ‘Jefferson’ 3x | 4.652 | 1.551 | 1.517 | Subg. Oreoptelea |
| 4 | U. americana 4x | 6.007–6.572 | 1.501–1.643 | 1.469–1.607 | Subg. Oreoptelea |
| 5 | U. crassifolia | 3.106–3.223 | 1.553–1.612 | 1.519–1.576 | Subg. Oreoptelea |
| 6 | U. elongata | 3.000 | 1.500 | 1.467 | Subg. Oreoptelea |
| 7 | U. laevis | 2.975–3.032 | 1.488–1.516 | 1.455–1.483 | Subg. Oreoptelea |
| 8 | U. serotina | 3.091 | 1.546 | 1.511 | Subg. Oreoptelea |
| 9 | U. thomasii | 2.975–3.201 | 1.488–1.601 | 1.455–1.565 | Subg. Oreoptelea |
| 10 | U. castaneifolia | 3.838–3.969 | 1.919–1.985 | 1.877–1.941 | Subg. Ulmus |
| 11 | U. changii | 3.721–3.891 | 1.861–1.946 | 1.820–1.903 | Subg. Ulmus |
| 12 | U. chenmoui | 3.874–3.979 | 1.937–1.990 | 1.894–1.946 | Subg. Ulmus |
| 13 | U. davidiana var. davidiana | 3.734–3.908 | 1.867–1.954 | 1.826–1.911 | Subg. Ulmus |
| 14 | U. davidiana var. japonica | 3.633–3.781 | 1.817–1.891 | 1.777–1.849 | Subg. Ulmus |
| 15 | U. davidiana var. uncertain | 3.649 | 1.825 | 1.784 | Subg. Ulmus |
| 16 | U. glabra | 3.947–4.058 | 1.974–2.029 | 1.930–1.984 | Subg. Ulmus |
| 17 | U. glaucescens var. glaucescens | 3.674 | 1.837 | 1.797 | Subg. Ulmus |
| 18 | Ulmus harbinensis | 3.804 | 1.902 | 1.860 | Subg. Ulmus |
| 19 | U. laciniata var. laciniata | 3.759 | 1.880 | 1.838 | Subg. Ulmus |
| 20 | U. laciniata var. nikkoensis | 3.961 | 1.981 | 1.937 | Subg. Ulmus |
| 21 | U. lamellosa | 3.771–3.955 | 1.886–1.978 | 1.844–1.934 | Subg. Ulmus |
| 22 | U. macrocarpa var. macrocarpa | 3.987 | 1.994 | 1.950 | Subg. Ulmus |
| 23 | Ulmus microcarpa 3x | 5.678 | 1.839 | 1.851 | Subg. Ulmus |
| 24 | U. minor | 3.724–4.104 | 1.862–2.052 | 1.821–2.007 | Subg. Ulmus |
| 25 | U. parvifolia | 3.837–3.919 | 1.919–1.960 | 1.876–1.916 | Subg. Ulmus |
| 26 | U. prunifolia | 3.874 | 1.937 | 1.894 | Subg. Ulmus |
| 27 | Ulmus pseudopropinqua | 3.732 | 1.866 | 1.825 | Subg. Ulmus |
| 28 | U. pumila | 3.671–3.92 | 1.836–1.960 | 1.795–1.917 | Subg. Ulmus |
| 29 | U. rubra | 3.77–4.006 | 1.885–2.003 | 1.844–1.959 | Subg. Ulmus |
| 30 | U. szechuanica | 3.711–3.781 | 1.856–1.891 | 1.815–1.849 | Subg. Ulmus |
| 31 | U. uyematsui | 4.023 | 2.012 | 1.967 | Subg. Ulmus |
| 32 | U. wallichiana | 4.165 | 2.082 | 2.037 | Subg. Ulmus |
| 33 | Ulmus villosa | 2.175–2.277 | 1.088–1.139 | 1.064–1.113 | Subg. Indoptelea |
Note: 2Cy represents the measured DNA content of one nucleus, and 1Cxx represents the DNA content of a haploid chromosome [39].