A model for determining ex situ conservation priorities in big genera is provided by analysis of the subgenera of Rhododendron (Ericaceae)

摘要: The large size and complex taxonomy of big genera complicates decision making for conservation. We propose that Rhododendron, comprising some 1215 taxa, divided into nine subgenera many sections, can be used as a model other genera. Although Red List assessments placed 715 taxa in threat category, or listed them Data Deficient, moreover Target 8 the Global Strategy Plant Conservation requires 75 % to held ex situ collections by 2020, date there have been few studies Rhododendron conservation priorities. Utilising subgenus structure framework examining priorities, we analysed determined Vireya Hymenanthes most acute issues. Examination cultivation shows 844 (70 %) are cultivation, with varying from 45 100 %. Of 400 (56 %) 28 72 %. Subgenera Azaleastrum poorest representation should precedence As no reaches requirement 8, further planning is needed Rhododendron. After combining two analyses, priorities ordered (i) Vireya, (ii) (iii) Hymenanthes. Finally, five actions summarise our approach