Genome. 1994 Aug;37(4):560-4. doi: 10.1139/g94-080.
The 2C and 4C nuclear DNA amounts were estimated in eight diploid species, belonging to three diverse genera (Vicia, Tephrosia, and Phlox) and their corresponding colchitetraploids. In P. drummondii, T. purpurea, and T. oxygona tetraploids the deviation from the expectation was highly significant. The DNA in P. drummondii was further discarded in subsequent (C1, C2) generations, thus attaining an overall reduction of about 25%. The DNA content in the subsequent generations was the same as that of C2. It is concluded that rapid DNA loss in the first and subsequent generations was not only associated with the substantial increase (30-66%) in the seed set, but it also helped in the establishment and stabilization of the tetraploid. The possible relationship between such a nucleotypic change and success of polyploids is discussed. The DNA change from the expected value in the P. drummondii tetraploid was achieved by equal decrement to each chromosome independent of size, i.e., small chromosomes loose the same amount of DNA as the large chromosomes.
对属于三个不同属（巢菜属、山黧豆属和福禄考属）的 8 个二倍体物种及其相应的 Colchitetraploids 进行了 2C 和 4C 核 DNA 含量的估算。在 P. drummondii、T. purpurea 和 T. oxygona 四倍体中，与预期的偏差具有高度显著性。在随后的（C1、C2）代中，P. drummondii 的 DNA 进一步被丢弃，从而导致总体减少约 25%。随后几代的 DNA 含量与 C2 相同。结论是，第一代和随后几代的快速 DNA 丢失不仅与种子产量的大幅增加（30-66%）有关，而且有助于四倍体的建立和稳定。讨论了这种核型变化与多倍体成功之间的可能关系。P. drummondii 四倍体中从预期值的 DNA 变化是通过独立于大小的每个染色体的均等减少实现的，即小染色体与大染色体丢失相同量的 DNA。
