Genome (Vol. 35, 1992, pp. 1068-1074) 

C-heterochromatin polymorphism in holocentric chromosomes of Triatoma infestans

(Hemiptera: Reduviidae)

Fco. Panzera and F. Alvarez/1; J. Sánchez-Rufas/2; R. Pérez/1; J. A. Suja/2; E. Scvortzoff/1; J. P. Dujardin/3; E. Estramil/4 and R. Salvatella/5

1. Secc. Genética Evolutiva, Facultad de Ciencias. Montevideo, Uruguay

2. Depto. de Biología, Facultad de Ciencias, U.A.M. Madrid, Spain

3. Laboratoire de Génétique des Parasites et des Vecteurs, ORSTOM, Montpellier, France

4. Facultad de Agronomía. Montevideo, Uruguay

5. Instituto de Higiene, Facultad de Medicina. Montevideo, Uruguay

This is the first report of intraspecific variation of C-bands in Heteroptera, described in natural populations of Triatoma infestans (Hemiptera: Reduviidae), the main vector of Chagas disease in Uruguay. Marked variation in number, position, and size of C-heterochromatic bands was found in the three large autosomal pairs. A geographical pattern of this chromosomal polymorphism was observed. Evolutionary importance and epidemiological relevance are discussed.

Key words: Triatoma infestans - cytogenetics - C-band polymorphism - holocentric chromosomes - Chagas disease