Unusual inheritance of the mitochondrial genome organization in the progeny of reciprocal crosses between alloplasmic hexaploid wheat regenerants

1994 ◽  
Vol 89 (5) ◽  
pp. 572-576 ◽  
Author(s):  
M. C. Morère-Le Paven ◽  
J. De Buyser ◽  
Y. Henry ◽  
C. Hartmann ◽  
A. Rode
Keyword(s):  
Mitochondrial Genome ◽  
Hexaploid Wheat ◽  
Genome Organization ◽  
Reciprocal Crosses

scholarly journals Frequent tRNA gene translocation towards the boundaries with control regions contributes to the highly dynamic mitochondrial genome organization of the parasitic lice of mammals

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Wen-Ge Dong ◽  
Yalun Dong ◽  
Xian-Guo Guo ◽  
Renfu Shao
Keyword(s):  
Mitochondrial Genome ◽  
Control Region ◽  
Genome Organization ◽  
Trna Gene ◽  
Trna Genes ◽  
Single Chromosome ◽  
Gene Translocation ◽  
Sucking Lice ◽  
Different Types ◽  
Mt Genome

Abstract Background The typical single-chromosome mitochondrial (mt) genome of animals has fragmented into multiple minichromosomes in the lineage Mitodivisia, which contains most of the parasitic lice of eutherian mammals. These parasitic lice differ from each other even among congeneric species in mt karyotype, i.e. the number of minichromosomes, and the gene content and gene order in each minichromosome, which is in stark contrast to the extremely conserved single-chromosome mt genomes across most animal lineages. How fragmented mt genomes evolved is still poorly understood. We use Polyplax sucking lice as a model to investigate how tRNA gene translocation shapes the dynamic mt karyotypes. Results We sequenced the full mt genome of the Asian grey shrew louse, Polyplax reclinata. We then inferred the ancestral mt karyotype for Polyplax lice and compared it with the mt karyotypes of the three Polyplax species sequenced to date. We found that tRNA genes were entirely responsible for mt karyotype variation among these three species of Polyplax lice. Furthermore, tRNA gene translocation observed in Polyplax lice was only between different types of minichromosomes and towards the boundaries with the control region. A similar pattern of tRNA gene translocation can also been seen in other sucking lice with fragmented mt genomes. Conclusions We conclude that inter-minichromosomal tRNA gene translocation orientated towards the boundaries with the control region is a major contributing factor to the highly dynamic mitochondrial genome organization in the parasitic lice of mammals.

The mitochondrial genome organization of a maize fertile cmsT revertant line is generated through recombination between two sets of repeats.

Genetics ◽  
1990 ◽  
Vol 124 (2) ◽  
pp. 423-428 ◽  
Author(s):  
C M Fauron ◽  
M Havlik ◽  
R I Brettell
Keyword(s):  
Mitochondrial Genome ◽  
Genome Organization ◽  
Callus Tissue ◽  
Mitochondrial Genomes ◽  
Normal Type ◽  
Male Sterile ◽  
Sequence Complexity ◽  
Mtdna Organization ◽  
Callus Tissue Culture ◽  
Fertile Revertant

Abstract The mitochondrial genome (mtDNA) organization from a fertile revertant line (V3) derived from the maize cytoplasmic male sterile type T (cmsT) callus tissue culture has been determined. We report that the sequence complexity can be mapped on to a circular "master chromosome" of 705 kb which includes a duplication of 165 kb of DNA when compared to its male sterile progenitor. Associated with this event is also a 0.423-kb deletion, which removed the cmsT-associated urf13 gene. As found for the maize normal type (N) and cmsT mitochondrial genomes, the V3 master chromosome also exists as a multipartite structure generated by recombination through repeated sequences.

Complete mitochondrial genome organization ofSchizothorax plagiostomus(Heckel, 1838)

2014 ◽  
Vol 27 (1) ◽  
pp. 113-114 ◽  
Author(s):  
Chirag Goel ◽  
Prabhati Kumari Sahoo ◽  
Ashoktaru Barat
Keyword(s):  
Mitochondrial Genome ◽  
Genome Organization ◽  
Complete Mitochondrial Genome

Nuclear genotype affects mitochondrial genome organization of CMS-S maize

1990 ◽  
Vol 223 (3) ◽  
pp. 457-464 ◽  
Author(s):  
Loida J. Escote-Carlson ◽  
Susan Gabay-Laughnan ◽  
John R. Laughnan
Keyword(s):  
Mitochondrial Genome ◽  
Genome Organization

scholarly journals Mitochondrial genome organization and vertebrate phylogenetics

2000 ◽  
Vol 23 (4) ◽  
pp. 745-752 ◽  
Author(s):  
Sérgio Luiz Pereira
Keyword(s):  
Mitochondrial Genome ◽  
Genome Organization ◽  
Tandem Duplication ◽  
Probable Mechanism ◽  
Mitochondrial Genomes ◽  
Protein Coding ◽  
Protein Coding Genes ◽  
Use Of Data ◽  
New Gene ◽  
Conserved Gene

With the advent of DNA sequencing techniques the organization of the vertebrate mitochondrial genome shows variation between higher taxonomic levels. The most conserved gene order is found in placental mammals, turtles, fishes, some lizards and Xenopus. Birds, other species of lizards, crocodilians, marsupial mammals, snakes, tuatara, lamprey, and some other amphibians and one species of fish have gene orders that are less conserved. The most probable mechanism for new gene rearrangements seems to be tandem duplication and multiple deletion events, always associated with tRNA sequences. Some new rearrangements seem to be typical of monophyletic groups and the use of data from these groups may be useful for answering phylogenetic questions involving vertebrate higher taxonomic levels. Other features such as the secondary structure of tRNA, and the start and stop codons of protein-coding genes may also be useful in comparisons of vertebrate mitochondrial genomes.

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