Independent domestications of cultivated tree peonies from different wild peony species |
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Authors: | Jun‐Hui Yuan Amandine Cornille Tatiana Giraud Fang‐Yun Cheng Yong‐Hong Hu |
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Institution: | 1. Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai Chenshan Botanical Garden, , Shanghai, 201602 China;2. Landscape Architecture College, Beijing Forestry University, , Beijing, 100083 China;3. Université Paris‐Sud, Ecologie, Systématique et Evolution, UMR8079, , 91405 Orsay, France;4. CNRS, Ecologie, Systématique et Evolution, UMR8079, , 91405 Orsay, France;5. AgroParisTech, , 91405 Orsay, France |
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Abstract: | An understanding of plant domestication history provides insights into general mechanisms of plant adaptation and diversification and can guide breeding programmes that aim to improve cultivated species. Cultivated tree peonies (genus Paeonia L.) are among the most popular ornamental plants in the world; yet, the history of their domestication is still unresolved. Here, we explored whether the domestication in China of historically cultivated peonies, that is, the common and flare cultivated tree peonies, was a single event or whether independent domestications occurred. We used 14 nuclear microsatellite markers and a comprehensive set of 553 tree peonies collected across China, including common tree peonies, flare tree peonies and the wild species or subspecies that are potential contributors to the cultivated tree peonies, that is, Paeonia rockii ssp. rockii, P. rockii ssp. atava, P. jishanensis and P. decomposita. Assignment methods, a principal component analysis and approximate Bayesian computations provided clear evidence for independent domestications of these common tree and flare tree peonies from two distinct and allopatric wild species, P. jishanensis and P. rockii ssp. atava, respectively. This study provides the first example of independent domestications of cultivated trees from distinct species and locations. This work also yields crucial insight into the history of domestication of one of the most popular woody ornamental plants. The cultivated peonies represent an interesting case of parallel and convergent evolution. The information obtained in this study will be valuable both for improving current tree peony breeding strategies and for understanding the mechanisms of domestication, diversification and adaptation in plants. |
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Keywords: | annual grass convergence East Asia hybridization ornamental cultivated tree
Paeonia suffruticosa
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