Drosophila albomicans belongs to the Drosophila nasuta subgroup of the Drosophila immigrans species group. As a good material of evolutionary genetics, this fruit fly has some special qualities in contrast with other ...Drosophila albomicans belongs to the Drosophila nasuta subgroup of the Drosophila immigrans species group. As a good material of evolutionary genetics, this fruit fly has some special qualities in contrast with other animals. In thousands of species of fruit flies, D. albomicans is one of the only two species in which B chromosomes have展开更多
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...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.展开更多
文摘Drosophila albomicans belongs to the Drosophila nasuta subgroup of the Drosophila immigrans species group. As a good material of evolutionary genetics, this fruit fly has some special qualities in contrast with other animals. In thousands of species of fruit flies, D. albomicans is one of the only two species in which B chromosomes have
基金the National Natural Science Foundation of China
文摘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.
