The reason for M.wufengensis to have high genetic diversity is perhaps
its evolutionary history and provenances. Studies on widespread,
endangered or endemic species have proved that abundant genetic
variation and diversity characteristics of a species are not directly
correlated to individual numbers, but inherited from their ancestors and
parents, so that their seedlings have high genetic diversity at species
level [20], which could be especially maintained after polyploidization
even at small population scale [23]. Magnolias are thought to be
among the earliest flowering plants in evolutionary history [24]. The
Wulingshan region, where M. wufengensis is found, is the intersection
region of East-Asian flora, for not only is it an original and complex
terrain for many ancient species, but also a gathering area for plant
species as well as a channel (the Wulingshan Corridor) of migration
routes for East-Asian plant elements [25]. From a point of view of its
various morphologies of flowers and leaves remaining among existing
individuals, we infer that polyploids give the foundation of such an
abundant genetic diversity derived from its ancestors even though
surrounded by inbreeding disadvantages [26].
The reason for M.wufengensis to have high genetic diversity is perhaps
its evolutionary history and provenances. Studies on widespread,
endangered or endemic species have proved that abundant genetic
variation and diversity characteristics of a species are not directly
correlated to individual numbers, but inherited from their ancestors and
parents, so that their seedlings have high genetic diversity at species
level [20], which could be especially maintained after polyploidization
even at small population scale [23]. Magnolias are thought to be
among the earliest flowering plants in evolutionary history [24]. The
Wulingshan region, where M. wufengensis is found, is the intersection
region of East-Asian flora, for not only is it an original and complex
terrain for many ancient species, but also a gathering area for plant
species as well as a channel (the Wulingshan Corridor) of migration
routes for East-Asian plant elements [25]. From a point of view of its
various morphologies of flowers and leaves remaining among existing
individuals, we infer that polyploids give the foundation of such an
abundant genetic diversity derived from its ancestors even though
surrounded by inbreeding disadvantages [26].
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