Random amplified polymorphic DNA analysis of Trypanosoma cruzi strains.
DNA extracted from 32 isolates of Trypanosoma cruzi was subjected to polymerase chain reaction amplification using 4 arbitrary primers resulting in relatively complex DNA profiles that include polymorphic markers known as random amplified polymorphic DNAs (RAPDs). The RAPD profiles of 18 strains belonging to zymodeme 1 (Z1) collected from various regions of South America exhibited a consistant pattern and 59 (59%) of the bands produced were present in all Z1 strains. A similar level of consistency was seen in the number of bands shared between 5 Z2 strains, 4 ZB strains and 2 ZC strains. A phenetic analysis of the 5 most different Z1 strains based on band sharing showed that their interrelationships mirrored their geographical origin. Comparison of the RAPD profiles of strains from different zymodemes showed that less than 7% of bands of strains in one zymodeme are present in strains of another zymodeme. Analysis of band sharing using bands present in all strains of a given zymodeme showed ZB and ZC to be closely related and Z1 and Z2 to form distinct groups.
Steindel
M
M
Laboratório de Bioquímica e Biologia Molecular, Centro de Pesquisas René Rachou, Belo Horizonte, Minas Gerais, Brazil.
Dias Neto
E
E
de Menezes
C L
CL
Romanha
A J
AJ
Simpson
A J
AJ
D000818:Animals; D001483:Base Sequence; D016054:DNA, Protozoan / Q000235:genetics*; D005784:Gene Amplification; D005828:Genetics, Population; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D013045:Species Specificity; D014349:Trypanosoma cruzi / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification
D016054:DNA, Protozoan