ISSN:
1573-3297
Schlagwort(e):
behavior sequences
;
heterosis
;
motor behavior
;
diallel cross
;
coefficient of convexity
;
mice
;
inbred strains of mice
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Psychologie
Notizen:
Abstract Three-hundred seventy-five mice of six inbred strains and their F1 hybrid crosses were observed in a barrier apparatus. Frequencies of jumping over barriers were recorded at each of ten 30-sec intervals. Graphs plotted of mean jumps at each time point show several F1 curves with an apparently adaptive pattern: low frequencies of jumps at start, gradually rising, then leveling off. Nine out of 15 F1 curves also show evidence of heterosis: jumping frequencies of hybrids exceed those of parent strains. Lack of heterosis was peculiar to crosses in which C57BL/6 was one of the parents. A coefficient of convexity C was developed to quantify the shapes of the temporal patterns of proportions of animals engaged in jumping at a given point in the sequence. F1 curves (unlike inbred strains) were found, on the whole, to be negatively convex.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01067771
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