| A cli-nicopathologic study of 79 cases with an analysis of histologic subtypes, immunohistology, and DNA ploidy. |
| The ploidy level turns out to be a very useful complementary criterion for the identification of varieties. |
| Moreover, by studying the impact of ploidy on salt and water stress tolerance, the researchers revealed that tetraploids were more tolerant. |
| If this information is not included for any variety, the ploidy is to be regarded as unknown, and thus a minimum isolation distance of 600 metres is required. |
| Chromosome number and ploidy vary greatly and there is much overlap between them. |
| The male variety should preferably be of the same taxon and at the same ploidy level as the female variety. |
