Cyclophosphamide-induced in vivo sister chromatid exchanges (SCE) in Mus musculus. III. Quantitative genetic analysis.
Genetics
; 105(1): 169-79, 1983 Sep.
Article
en En
| MEDLINE
| ID: mdl-6618167
ABSTRACT
In vivo cyclophosphamide (CP)-induced sister chromatid exchanges (SCEs) were evaluated in females from five genetic strains of mice (C57BL/6J, C3H/S, 129/ReJ, BALB/c and DBA/2) and their F1 hybrids. Baseline (noninduced) SCE values differ significantly among strains, 129/ReJ having the lowest and DBA/2 having the highest mean SCE per cell values. In general, the baseline SCE of a given F1 is within the range of its corresponding parental strains or near the lower parental value. Furthermore, there is a genotype-dependent increase in mean SCEs per cell with CP dose. Strain differences in SCE induction are noted particularly at the two higher CP doses (4.50 and 45.0 mg/kg). In general, F1 hybrids involving a strain with high induced SCEs and a strain with low induced SCEs exhibit mean SCE values that are closer to the value of the lower strain. F1s involving two strains with high SCEs or two strains with low SCEs yield SCEs not different from parental strains. The method of diallel cross analysis showed the order of dominance of these strains in SCE induction to be 129/ReJ BALB/c C3H/S DBA/2 C57BL/6J. These results support the involvement of predominantly nonadditive genetic factors as major gene(s) in SCE induction. In addition, involvement of random and independent events in SCE induction is suggested by the distribution of SCEs which follows a Poisson distribution.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Intercambio de Cromátides Hermanas
/
Intercambio Genético
/
Ciclofosfamida
/
Ratones Endogámicos
Límite:
Animals
Idioma:
En
Revista:
Genetics
Año:
1983
Tipo del documento:
Article