自然选择与墨西哥南部一个农村自给农业社区中体型变小无关。
Natural selection is not related to reduced body size in a rural subsistence agricultural community in southern Mexico.
作者信息
Little B B, Malina R M, Buschang P H, Little L R
出版信息
Hum Biol. 1989 Apr;61(2):287-96.
Adult Zapotecs are among the shortest Indians in Mexico. This study investigated whether reduced body size was an effect of genetic selection or a developmental effect of very poor nutrition and health. Fertility, offspring survival, and offspring prereproductive mortality were regressed on stature and weight of 205 multiparous adults (ages 20 to 72). The statistical analyses suggest that the exceptionally short stature of Zapotec Indians in this community is due to poor environmental conditions and not to genetic selection or adaptation.
成年萨波特克人是墨西哥最矮的印第安人群体之一。本研究调查了身材矮小是基因选择的结果，还是营养不良和健康状况极差所产生的发育影响。对205名经产妇（年龄在20至72岁之间）的身高和体重进行生育率、子代存活率和子代生殖前死亡率的回归分析。统计分析表明，该社区萨波特克印第安人异常矮小的身材是环境条件恶劣所致，而非基因选择或适应的结果。
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