This thesis is focus on the polymorphism and evolution pattern of the 18S-26S rRNA gene family within the genome of tea(Camellia sinensis) and two relative species.The intergenic spacer(1GS) of the 18S-26S rRNA gene of tea,and regions near the 3'end of 26S rRNA gene and the 5' end of 18S rRNA gene of tea and two relative species have been cloned and sequenced,respetively.Results are as follows:
1) The IGS of tea has a high degree of polymorphism.Eight kinds of sequences were obtained from the ...