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Behavioral Variation in Natural Populations. II. The Inheritance of a Feeding Response in Crosses Between Geographic Races of the Garter Snake, Thamnophis elegans
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Behavioral Variation in Natural Populations. II. The Inheritance of a Feeding Response in Crosses Between Geographic Races of the Garter Snake, Thamnophis elegans

著者: Stevan J Arnold
版本/格式: 文章 文章 : 英语
刊登在:Evolution, May, 1981, vol. 35, no. 3, p. 510-515
数据库:JSTOR
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文件类型: 文章
所有的著者/提供者: Stevan J Arnold
ISSN:0014-3820
OCLC号码: 478629016
语言注释: English
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摘要:

An analysis of a slug-eating response by naive, newborn garter snakes provides a particularly clear example of geographic variation in behavior with a genetic basis. Feeding responses were recorded for three parental populations and their F<sub>1</sub> progeny: behaviors were scored in a total of 1,531 snakes. Populations that are sympatric with slugs show the highest incidence of slug-eating snakes (68-85%), while in an allopatric population the incidence is only 17%. Thus the geographic variation in this behavior is undoubtedly maintained by selection. The behavior is congenital and stable. Crosses between populations indicate at least partial dominance for slug-refusal but the number of loci involved is unknown. Reciprocal F<sub>1</sub> progeny show the same incidence of slug-eating (19-32%) and give no indication of maternal effects.

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