摘要
The technique of mtDNA restriction fragments length polymorphism(RFLP)was used tosurvey the population structure of D.albomicans.Remarkable mtDNA polymorphism has been observed inD.albomicans populations.A total of 34 nucleomorphs were detected from 82 isofemale lines assayed by only8 restriction enzymes.The cause and the effect of this phenomenon were discussed.As a result,it is sug-gested that a mechanism which maintains mtDNA diversity exists in this fly,and that the high intra-popula-tional polymorphism could numerically conceal the extent of differentiation between populations.In addition,on the base of restriction maps,it was found that the mtDNA molecule of D.albomicans might be impactedby the selection pressure during its evolution process both on the nucleotide composition and on the function-al regions.
The technique of mtDNA restriction fragments length polymorphism(RFLP)was used to survey the population structure of D.albomicans.Remarkable mtDNA polymorphism has been observed in D.albomicans populations.A total of 34 nucleomorphs were detected from 82 isofemale lines assayed by only 8 restriction enzymes.The cause and the effect of this phenomenon were discussed.As a result,it is sug- gested that a mechanism which maintains mtDNA diversity exists in this fly,and that the high intra-popula- tional polymorphism could numerically conceal the extent of differentiation between populations.In addition, on the base of restriction maps,it was found that the mtDNA molecule of D.albomicans might be impacted by the selection pressure during its evolution process both on the nucleotide composition and on the function- al regions.
基金
the National Natural Science Foundation of China
