期刊
PLANT BIOLOGY
卷 22, 期 5, 页码 932-938出版社
WILEY
DOI: 10.1111/plb.13140
关键词
chaya; Cladogenesis; Cnidoscolus aconitifolius; domestication; reproductive barriers; reproductive isolation; sympatric speciation; wild-crop plant gene flow
资金
- SEP-Cinvestav project [FIDSC2018/22]
Reproductive isolation is a necessary condition for plant domestication in their domestication centre where crops co-occur with their wild progenitors. However, the identification of reproductive barriers and their relative contribution to reproductive isolation have been overlooked in plants under domestication. We assessed pre- and post-pollination reproductive barriers and their relative contribution to reproductive isolation between wild and domesticated chaya (Cnidoscolus aconitifolius) in its domestication centre. We found that wild and domesticated chaya both exhibit a high degree of reproductive isolation. However, the reproductive isolation barriers exhibited some asymmetry: while pre-pollination barriers (differential pollen production and pollinator specificity) were only detected in wild plants, post-pollination barriers (pollen-pistil incompatibility and/or failure to set fruit) were observed in both wild and domesticated plants. We conclude that complete reproductive isolation has evolved in sympatry in co-occurring domesticated and wild chaya.
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