尼日利亚拉各斯的黑腹果蝇种群中3号染色体的遗传负荷。

Genetic load in chromosomes 3 in a population of Drosophila melanogaster in Lagos, Nigeria.

作者信息

Williams G O, Banboye E R

机构信息

Department of Biological Sciences, University of Lagos, Nigeria.

出版信息

Hereditas. 1996;125(1):83-7. doi: 10.1111/j.1601-5223.1996.00083.x.

DOI:10.1111/j.1601-5223.1996.00083.x

PMID:9062085

Abstract

Among 194 chromosomes 3 tested, 48.2% were lethal, 13.4% semilethal, 14.4% subvital, and 29.4% non-lethal. The genetic load in the population is high since only about 30% of the chromosome did not reduce viability, and the frequency of drastic (lethals and semilethals), 56%, is among the highest reported for the chromosome. The frequency of lethals is also high. The rate of allelism is low, only 0.5% among the 28 lethals tested. There were, however, 5 probable cases of pseudoallelism in which some non-allelic lethal chromosomes were either semilethal or subvital in the heterozygous condition.

摘要

在检测的194条3号染色体中，48.2%是致死性的，13.4%是半致死性的，14.4%是亚致死性的，29.4%是非致死性的。群体中的遗传负荷很高，因为只有约30%的染色体没有降低活力，而严重（致死性和半致死性）染色体的频率为56%，是该染色体报道的最高频率之一。致死性染色体的频率也很高。等位性比率很低，在检测的28条致死性染色体中仅为0.5%。然而，有5个可能的拟等位基因情况，其中一些非等位致死性染色体在杂合状态下是半致死性或亚致死性的。