Ubiquity of the St chloroplast genome in St-containing Triticeae polyploids.

Interspecific hybridization occurs between Tritceae species in the grass family (Poaceae) giving rise to allopolyploid species. To examine bias in cytoplasmic DNA inheritance in these hybridizations, the sequence of the 3' end of the chloroplast ndhF gene was compared among 29 allopolyploid Triticeae species containing the St nuclear genome in combination with the H, I, Ns, P, W, Y, and Xm nuclear genomes. These ndhF sequences were also compared with those from diploid or allotetraploid Triticeae species having the H, I, Ns, P, W, St, and Xm genomes. The cpDNA sequences were highly similar among diploid, allotetraploid, allohexaploid, and allooctoploid Triticeae accessions containing the St nuclear genome, with 0-6-nucleotide (nt) substitutions (0-0.8%) occurring between pairs of species. Neighbor-joining analysis of the sequences showed that the ndhF DNA sequences from species containing the St nuclear genome formed a strongly supported clade. The data indicated a strong preference for cpDNA inheritance from the St nuclear genome-containing parent in hybridizations between Triticeae species. This preference was independent of the presence of the H, I, Ns, P, W, and Xm nuclear genomes, the geographic distribution of the species, and the mode of reproduction. The data suggests that hybridizations having the St-containing parent as the female may be more successful.

[1]  C. Pikaard,et al.  Nucleolar dominance and silencing of transcription. , 1999, Trends in plant science.

[2]  Kevin B. Jensen,et al.  Natural Hybrids of Elymus elymoides × Leymus salinus subsp. salmonis (Poaceae: Triticeae) Kevin B. Jense , 1999 .

[3]  M. Warburton,et al.  Plant genetic resources: what can they contribute toward increased crop productivity? , 1999, Proceedings of the National Academy of Sciences of the United States of America.

[4]  K. Tsunewaki,et al.  Plasmon analyses of Triticum (wheat) and Aegilops: PCR-single-strand conformational polymorphism (PCR-SSCP) analyses of organellar DNAs. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[5]  R. Olmstead,et al.  Phylogeny of Poaceae subfamily Pooideae based on chloroplast ndhF gene sequences. , 1997, Molecular phylogenetics and evolution.

[6]  S. Muse,et al.  Comparisons of the molecular evolutionary process at rbcL and ndhF in the grass family (Poaceae). , 1997, Molecular biology and evolution.

[7]  Z. Chen,et al.  Transcriptional analysis of nucleolar dominance in polyploid plants: biased expression/silencing of progenitor rRNA genes is developmentally regulated in Brassica. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[8]  R. Bothmer,et al.  A study of 28 Elymus species using repetitive DNA sequences. , 1996, Genome.

[9]  E. Kellogg,et al.  Testing for Phylogenetic Conflict Among Molecular Data Sets in the Tribe Triticeae (Gramineae) , 1996 .

[10]  E. Kellogg,et al.  When Genes Tell Different Stories: the Diploid Genera of Triticeae (Gramineae) , 1996 .

[11]  J. Wendel,et al.  A Phylogeny of the Grass Family (Poaceae) Based on ndhF Sequence Data , 1995 .

[12]  D. Soltis,et al.  DISCORDANCE BETWEEN NUCLEAR AND CHLOROPLAST PHYLOGENIES IN THE HEUCHERA GROUP (SAXIFRAGACEAE) , 1995, Evolution; international journal of organic evolution.

[13]  K. H. Asay,et al.  Phylogenetic relationships of the monogenomic species of the wheat tribe, Triticeae (Poaceae), inferred from nuclear rDNA (internal transcribed spacer) sequences. , 1995, Genome.

[14]  Richard G. Olmstead,et al.  Combining Data in Phylogenetic Systematics: An Empirical Approach Using Three Molecular Data Sets in the Solanaceae , 1994 .

[15]  K. H. Asay,et al.  Phylogenetic relationships of 10 grass species: an assessment of phylogenetic utility of the internal transcribed spacer region in nuclear ribosomal DNA in monocots. , 1994, Genome.

[16]  J Dvorák,et al.  The evolution of polyploid wheats: identification of the A genome donor species. , 1993, Genome.

[17]  W. Viegas,et al.  Genetic control of 1R nucleolus organizer region expression in the presence of wheat genomes , 1990 .

[18]  D. R. Dewey.  The Genomic System of Classification as a Guide to Intergeneric Hybridization with the Perennial Triticeae , 1986 .

[19]  M. Redinbaugh,et al.  The western wheatgrass chloroplast genome originates in Pseudoroegneria. , 2000 .

[20]  L. Rieseberg,et al.  Tansley review No. 102 plant hybridization , 1998 .

[21]  J. Dvorak,et al.  Genome Symbols in the Triticeae (Poaceae) , 1994 .

[22]  Han Mk,et al.  Genetic analysis using random amplified polymorphic DNA markers. , 1993 .