Comparisons among two fertile and three male-sterile mitochondrial genomes of maize.

Comparisons among two fertile and three male-sterile mitochondrial genomes of maize. Research Abstract Details 

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Comparisons among two fertile and three male-sterile mitochondrial genomes of maize. Abstract Text:

James O Allen,Christiane M Fauron,Patrick Minx,Leah Roark,Swetha Oddiraju,Guan Ning Lin,Louis Meyer,Hui Sun,Kyung Kim,Chunyan Wang,Feiyu Du,Dong Xu,Michael Gibson,Jill Cifrese,Sandra W Clifton,Kathleen J Newton,

We have sequenced five distinct mitochondrial genomes in maize: two fertile cytotypes (NA and the previously reported NB) and three cytoplasmic-male-sterile cytotypes (CMS-C, CMS-S, and CMS-T). Their genome sizes range from 535,825 bp in CMS-T to 739,719 bp in CMS-C. Large duplications (0.5-120 kb) account for most of the size increases. Plastid DNA accounts for 2.3-4.6% of each mitochondrial genome. The genomes share a minimum set of 51 genes for 33 conserved proteins, three ribosomal RNAs, and 15 transfer RNAs. Numbers of duplicate genes and plastid-derived tRNAs vary among cytotypes. A high level of sequence conservation exists both within and outside of genes (1.65-7.04 substitutions/10 kb in pairwise comparisons). However, sequence losses and gains are common: integrated plastid and plasmid sequences, as well as noncoding "native" mitochondrial sequences, can be lost with no phenotypic consequence. The organization of the different maize mitochondrial genomes varies dramatically; even between the two fertile cytotypes, there are 16 rearrangements. Comparing the finished shotgun sequences of multiple mitochondrial genomes from the same species suggests which genes and open reading frames are potentially functional, including which chimeric ORFs are candidate genes for cytoplasmic male sterility. This method identified the known CMS-associated ORFs in CMS-S and CMS-T, but not in CMS-C.

Comparisons among two fertile and three male-sterile mitochondrial genomes of maize. Publishing Authors By Initials

JO Allen,CM Fauron,P Minx,L Roark,S Oddiraju,GN Lin,L Meyer,H Sun,K Kim,C Wang,F Du,D Xu,M Gibson,J Cifrese,SW Clifton,KJ Newton,

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Comparisons among two fertile and three male-sterile mitochondrial genomes of maize. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Genetics

VOLUME: 177

Page Numbers: 1173-92

Journal Abbreviation: Genetics

ISSN: 0016-6731

DAY: 29

MONTH: 07

YEAR: 2007

Comparisons among two fertile and three male-sterile mitochondrial genomes of maize. Information

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LANGUAGE: eng

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AFFILIATION: Division of Biological Sciences, University of Missouri, Columbia, Missouri 65211, USA.

Country: United States

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MEDLINETA: Genetics

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