Abstract
Twenty-two wild-caught male house mice were test crossed to females from the CBA inbred line, and their progeny were measured for 7 morphological and 10 behavioral traits. Significant genetic variance among the wild-caught sires was detected for snout-vent length, tail length, footpad bristle number, and fertility, while significant effects of the maternal CBA environment were detected for tail length, hindfoot length, and open-field defecation. On average over all 7 morphological traits, 62% of the total variance among the progeny was estimated to be due to genetic variation, while 15% was attributed to differences in maternal environment. Over the 10 behavioral traits, the corresponding figures were 22% due to genetic variation and 24% due to the maternal environment.
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