Mitochondrial DNA of cytoplasmic male-sterile Triticum timopheevi: rearrangement of upstream sequences of the atp6 and orf25 genes

1993 ◽  
Vol 86-86 (2-3) ◽  
pp. 259-268 ◽  
Author(s):  
S. Mohr ◽  
E. Schulte-Kappert ◽  
W. Odenbach ◽  
G. Oettler ◽  
U. Kück
Keyword(s):  
Mitochondrial Dna ◽  
Male Sterile ◽  
Cytoplasmic Male Sterile ◽  
Triticum Timopheevi

Influence of nuclear background on transcription of a chimeric gene (orf256) and coxI in fertile and cytoplasmic male sterile wheats

Genome ◽  
1994 ◽  
Vol 37 (2) ◽  
pp. 203-209 ◽  
Author(s):  
Jiasheng Song ◽  
Charles Hedgcoth
Keyword(s):  
Mitochondrial Dna ◽  
Open Reading Frame ◽  
Mitochondrial Rna ◽  
Coding Region ◽  
Male Sterile ◽  
Reading Frame ◽  
Cytoplasmic Male Sterile ◽  
Triticum Timopheevi ◽  
Nuclear Background ◽  
Flanking Region

Crosses between Triticum timopheevi, as maternal donor, and T. aestivum can lead to cytoplasmic male sterile (cms) plants. The T. timopheevi derived mitochondrial DNA from parental, cms, and fertility-restored lines differs from that of T. aestivum derived mtDNA in the coxI gene region. Our previous results for cms lines showed that there is an open reading frame, orf256, upstream from coxI in T. timopheevi derived mtDNA that is not present in T. aestivum DNA. The 5′ flanking region and the first 33 nucleotides of the coding region of orf256 are identical to the corresponding region of T. aestivum coxI, whereas the rest of orf256, including the 3′ flank, is not related to coxI. Also, the organization of orf256 and coxI on a HindIII fragment from T. timopheevi derived mtDNA are identical in T. timopheevi, cms, and fertility-restored lines. We now report that the DNA sequence of orf256 is identical in T. timopheevi, cms, and fertility-restored lines. Major transcripts in cms and fertility-restored lines encode both orf256 and coxI with 5′ termini like coxI mRNA of T. aestivum, whereas parental mitochondria from T. timopheevi have major transcripts with 5′ termini within the orf256 coding region. Mitochondria from cms and fertility-restored lines have the potential to produce a protein that would not be present in parental T. timopheevi or in T. aestivum.Key words: cytoplasmic male sterility, wheat, mitochondrial DNA, mitochondrial RNA, coxI.

Mitochondrial DNA genetic polymorphism in thirteen rice cytoplasmic male sterile lines

2013 ◽  
Vol 32 (4) ◽  
pp. 545-554 ◽  
Author(s):  
Ji Luan ◽  
Tianran Liu ◽  
Weiqi Luo ◽  
Wen Liu ◽  
Minqi Peng ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Polymorphism ◽  
Male Sterile ◽  
Cytoplasmic Male Sterile
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