MOLECULAR EVIDENCE FOR THE MATERNAL PARENTAGE IN THE HYBRID ORIGIN OFSPARTINA-ANGLICA

Spartina anglica is a textbook example of a natural amphiploid, which originated from hybridization between S. alterniflora and S. maritina. Which of these species was the maternal parent has remained a mystery . Inheritance of chloroplast DNA in most angiosperms is strictly mater nal and can thus be used to test the parentage of hybrid taxa. The DNA sequence of the chloroplast leucine tRNA gene intron was used to show that the introduced North American S. alterniflora is the female pare nt of the F-1 hybrid S. x to townsendii and the amphiploid S. anglica. A possible scenario for their origin is given.