Guerreiro J F, dos Santos E J, dos Santos S E
Federal University of Pará, Belém, Brazil.
Ann Hum Biol. 1994 Nov-Dec;21(6):589-95. doi: 10.1080/03014469400003592.
The relationship between average heterozgosity and genetic distance estimates was evaluated among 13 Amazonian Indian tribes, using data of 24 genetic systems. The results showed that the genetic distances were negatively correlated with the average heterozygosity for each pair of tribes. The relationship between genetic and geographic distances was also examined, but no significant correlation was observed between these measures. The negative correlation between genetic distance and average heterozygosity may be attributed to the bottleneck effect or inbreeding due to the small effective size of several tribes, reducing the heterozgosity and increasing the genetic distance between them.
利用24个遗传系统的数据，对13个亚马逊印第安部落的平均杂合度与遗传距离估计值之间的关系进行了评估。结果表明，各部落对之间的遗传距离与平均杂合度呈负相关。还研究了遗传距离与地理距离之间的关系，但未观察到这些指标之间存在显著相关性。遗传距离与平均杂合度之间的负相关可能归因于瓶颈效应或近亲繁殖，这是由于几个部落的有效群体规模较小，降低了杂合度并增加了它们之间的遗传距离。
