Molecular criteria for determining new hybrid species--an application to the Sonneratia hybrids.
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.
Zhou
Renchao
R
State Key Laboratory of Biocontrol and Key Laboratory of Gene Engineering of the Ministry of Education, Zhongshan University, Guangzhou 510275, People's Republic of China.
Shi
Suhua
S
Wu
Chung-I
CI
D001483:Base Sequence; D003433:Crosses, Genetic; D017931:DNA Primers; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D005819:Genetic Markers / Q000235:genetics*; D006824:Hybridization, Genetic; D040582:Inheritance Patterns / Q000235:genetics; D029561:Lythraceae / Q000235:genetics*; D008969:Molecular Sequence Data; D021141:Nucleic Acid Amplification Techniques; D010802:Phylogeny; D012150:Polymorphism, Restriction Fragment Length; D017422:Sequence Analysis, DNA; D013045:Species Specificity
D017931:DNA Primers; D021903:DNA, Ribosomal Spacer; D005819:Genetic Markers