| 摘要 |
[Objectives] To provide a reference for the efficient use of wild Paeonia suffruticosa germplasm resources and the scientific selection of parents. [Methods] This study systematically evaluated cross-compatibility by conducting interspecific crosses among the major wild species subsect. Delavayanae (Paeonia delavayi, Paeonia lutea, Paeonia potaninii, and Paeonia ludlowii) as well as reciprocal crosses between these species and cultivated varieties from the subsect. Vaginatae. [Results] Crosses among P. delavayi, P. lutea, and P. potaninii generally exhibited good seed set, with the resulting seeds showing a high emergence rate. In contrast, crosses involving P. ludlowii as a parent produced only a limited number of seeds, none of which germinated. In crosses with cultivated varieties where the wild species served as the maternal parent, the average seed set ranked as follows: P. lutea>P. delavayi>P. ludlowii>P. potaninii. When wild species were used as paternal parent, the average seed set ranked as follows: P. potaninii>P. lutea>P. delavayi>P. ludlowii. On the whole, most crosses between wild species of subsect. Delavayanae and cultivated varieties achieved normal seed set, demonstrating a certain degree of cross-compatibility. However, when the wild species served as the maternal parent, both the seed set and seedling emergence rate were superior to those in the reciprocal crosses (with wild species as the paternal parent). [Conclusions] Significant differences in cross-compatibility were observed among species within Paeonia subsect. Delavayanae. In addition, a significant maternal effect was identified in crosses between wild species of this subsection and cultivated varieties. These findings suggest that by selecting highly compatible combinations, there remains considerable potential for utilizing these wild species in peony breeding. |
