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Updated: Jun 25, 2026

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Molecular criteria for determining new hybrid species--an application to the Sonneratia hybrids
Renchao Zhou1, Suhua Shi, Chung-I Wu
1State Key Laboratory of Biocontrol and Key Laboratory of Gene Engineering of the Ministry of Education, Zhongshan University, Guangzhou 510275, People's Republic of China.
Abstract:
The possible hybrid origin of new species can usually be corroborated by molecular means. Here, we suggest that the segregation patterns of the molecular markers be further analyzed. A true hybrid species should show the patterns under continuous breeding among its members, at least beyond the F2 generation. We applied the guidelines to the putative hybrid species of Sonneratia, a widespread mangrove genus, and concluded that all the observed hybrids in this genus are simple F1's. Thus, S. x gulngai and S. x hainanensis are not true hybrid species. The segregation patterns of molecular markers should be heeded in interpreting the existence of hybrid species.
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