Recombination and intraspecific polymorphism for the presence and absence of entire chromosomes in mitochondrial genomes.

ABSTRACT: Although mitochondrial genomes are typically thought of as single circular molecules, these genomes are fragmented into multiple chromosomes in many eukaryotes, raising intriguing questions about inheritance and (in)stability of mtDNA in such systems. A previous comparison of mitochondrial genomes from two different individuals of the angiosperm species Silene noctiflora found variation in the presence of entire mitochondrial chromosomes. Here, we expand on this work with a geographically diverse sampling of 25 S. noctiflora populations and the closely related species S. turkestanica and S. undulata. Using a combination of deep sequencing and PCR-based screening for the presence of 22 different mitochondrial chromosomes, we found extensive variation in the complement of chromosomes across

SUBMITTER: Wu Z 

PROVIDER: S-EPMC6461862 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature