Clonal diversity in the ancient asexual ostracod Darwinula stevensoni assessed by RAPD-PCR
نویسندگان
چکیده
منابع مشابه
No slave to sex.
Fully asexual lineages cannot purge accumulating mutations from their genome through recombination. In ancient asexuals that have persisted without sex for millions of years, this should lead to high allelic divergences (the 'Meselson effect') as has been shown for bdelloid rotifers. Homogenizing mechanisms can counter this effect, resulting in low genetic diversity within and between individua...
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BACKGROUND Fully asexually reproducing taxa lack outcrossing. Hence, the classic Biological Species Concept cannot be applied. METHODOLOGY/PRINCIPAL FINDINGS We used DNA sequences from the mitochondrial COI gene and the nuclear ITS2 region to check species boundaries according to the evolutionary genetic (EG) species concept in five morphospecies in the putative ancient asexual ostracod gener...
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Asexual organisms can be genetically variable and evolve through time, yet it is not known how genetic diversity is maintained in populations. In sexual organisms, negative frequency-dependent selection plays a role in maintaining diversity at some loci, but in asexual organisms, this mechanism could provide a general explanation for persistent genetic diversity because it acts on the whole gen...
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Hymenolepis nana is a common parasite of rodents as well as human intestine. This parasite has beenreported from all over the world, including Iran. The infection rate has been reported up to 40% in someareas. The infection has various clinical manifestations. The parasite could establish severe hyperinfection inpatients with immune deficiency. Regarding the rodents as hosts of the parasite, th...
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ژورنال
عنوان ژورنال: Heredity
سال: 2004
ISSN: 0018-067X,1365-2540
DOI: 10.1038/sj.hdy.6800486