The results of interspecific hybridization showed significant difference when different ploidy cultivars were used as female parents. The karyotypes of eight Tulipa species were classified as 3A, 4A or 3B. edulis were determined for the first time. heterophylla were firstly reported and the karyotypes of all any other species except for T. This work confirmed that all eight species collected in China were diploid (2 n = 2 x = 24), among which chromosome numbers of T. The ovary-swelling, fruit-setting and bulblet formation rates were surveyed when different ploidy cultivars were used as female parents. altaica and ten tulip cultivars to obtain novel germplasm. And the interspecific crosses were made between T.
The objective of this study was to verify the chromosome number, karyotype and genetic relationship of the eight Tulipa species: T. For Tulipa species native to China, very limited cytological information is available now. The information of ploidy, karyotype and genetic relationship is useful for interspecific hybridization in ornamental plants.
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