Unraveling selection in the mitochondrial genome of Drosophila.
Unraveling selection in the mitochondrial genome of Drosophila.
复制标题
解开果蝇线粒体基因组的选择。
DOI:
10.1093/genetics/138.3.757
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发表时间:
1994
期刊:
影响因子:
3.3
通讯作者:
Kreitman,M
中科院分区:
文献类型:
--
作者:
Ballard,JW;Kreitman,M
We examine mitochondrial DNA variation at the cytochrome b locus within and between three species of Drosophila to determine whether patterns of variation conform to the predictions of neutral molecular evolution. The entire 1137-bp cytochrome b locus was sequenced in 16 lines of Drosophila melanogaster, 18 lines of Drosophila simulans and 13 lines of Drosophila yakuba. Patterns of variation depart from neutrality by several test criteria. Analysis of the evolutionary clock hypothesis shows unequal rates of change along D. simulans lineages. A comparison within and between species of the ratio of amino acid replacement change to synonymous change reveals a relative excess of amino acid replacement polymorphism compared to the neutral prediction, suggestive of slightly deleterious or diversifying selection. There is evidence for excess homozygosity in our world wide sample of D. melanogaster and D. simulans alleles, as well as a reduction in the number of segregating sites in D. simulans, indicative of selective sweeps. Furthermore, a test of neutrality for codon usage shows the direction of mutations at third positions differs among different topological regions of the gene tree. The analyses indicate that molecular variation and evolution of mtDNA are governed by many of the same selective forces that have been shown to govern nuclear genome evolution and suggest caution be taken in the use of mtDNA as a "neutral" molecular marker.
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影响因子:
10.7
作者:
A. Clark
通讯作者:
A. Clark
影响因子:
6.5
作者:
D. Faith
通讯作者:
D. Faith
影响因子:
14.9
作者:
D. Clary;D. Wolstenholme
通讯作者:
D. Wolstenholme
影响因子:
3.3
作者:
Rama S. Singh;L. Rhomberg
通讯作者:
L. Rhomberg
DOI:
--
发表时间:
1992
期刊:
Proceedings of the Royal Society of London. Series B: Biological Sciences
影响因子:
--
作者:
F. Rousset;D. Vautrin;M. Solignac
通讯作者:
M. Solignac