Relationships betweenOryza species (Poaceae) based on 5S DNA sequences

McIntyre, C. Lynne; Winberg, B.; Houchins, Katherine; Appels, R.; Baum, Bernard R.

doi:10.1007/bf00940807

Cited by 18 publications

(7 citation statements)

References 31 publications

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“…In all studies of 5S nrDNA that have involved the isolation and sequencing of multiple repeat units, 219 considerable intragenomic polymorphism has been discovered (e.g., Appels et al, 1992;Baum and Appels, 1992;Baum and Johnson, 1994;Cox et al, 1992;Cronn et al, 1996;McIntyre et al, 1992;Playford et al, 1992;Schneeberger and Cullis, 1992). This indicates that the homogenizing processes of concerted evolution (e.g., gene conversion, unequal crossing over) are not fully effective across all 5S nrDNA repeats in the nuclear genome.…”

Section: Introductionmentioning

confidence: 97%

Molecular Phylogenetics of Calamus (Palmae) and Related Rattan Genera Based on 5S nrDNA Spacer Sequence Data

Baker

Hedderson

Dransfield

2000

Molecular Phylogenetics and Evolution

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Section: Introductionmentioning

confidence: 97%

Molecular Phylogenetics of Calamus (Palmae) and Related Rattan Genera Based on 5S nrDNA Spacer Sequence Data

Baker

Hedderson

Dransfield

2000

Molecular Phylogenetics and Evolution

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“…In grasses, the GϩC content ranges from 52.2% (Oryza latifolia;McIntyre et al, 1992) to 56.3% in Pseudarrhenatherum longifolium (this study). G is the most frequent nucleotide in the coding strand, followed by C and A, thus resulting in ca.…”

Section: Gϩc Content and Frequencies Of The Nucleotides In The 5s Rdnmentioning

confidence: 91%

“…The gene is generally well conserved in sequence and length. Length variation in grasses has been reported to date in only seven species: Triticum aestivum (Gerlach and Dyer, 1980;Appels and Clarke, 1992), Agropyron cristatum, Psathyrostachys juncea, Hordeum bulbosum (Scoles et al, 1988), Oryza brachyan- tha (McIntyre et al, 1992), Helictotrichon marginatum, and H. bromoides (this study). This variation centers on the CGAGAC sequence 48 bp from the 3Ј end of the gene.…”

mentioning

confidence: 82%

“…All spacer sequences of Aveneae studied are characterized by an excessive representation of the nucleotide G (Table 4). In Oryza (McIntyre et al, 1992), however, the most frequent nucleotides are generally either T or C, except for two species in which the four nucleotides are present with almost equivalent frequencies (Table 4). The ratios of the nucleotides in the spacers of Oryza are obviously related to the genomic constitution of the respective species.…”

Section: Gϩc Content and Frequencies Of The Nucleotides In The 5s Rdnmentioning

confidence: 94%

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Molecular Diversity and Physical Mapping of 5S rDNA in Wild and Cultivated Oat Grasses (Poaceae: Aveneae)

Röser

Winterfeld

Grebenstein

et al. 2001

Molecular Phylogenetics and Evolution

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“…The possibility of O. australiensis being a sister to the ABCD lineage should not be excluded. Other studies have shown that the association between O. australiensis and members of the section Oryza is usually very weak (Dally and Second 1990;McIntyre et al 1992;Wang et al 1992).…”

Section: Species and Genome Evolution In Oryzamentioning

confidence: 99%

Sequence variation in the gene encoding the 10-kDa prolamin in Oryza (Poaceae). I. Phylogenetic Implications

Mullins

Hilu

2002

Theor Appl Genet

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Oryza L. (Poaceae) contains approximately 20 wild and two domesticated species and nine genomes. Major disagreements exist on its systematics and genome evolution. Sequence polymorphism in the gene that encodes the 10-kDa prolamin polypeptide (a seed storage protein) was used to determine phylogenetic relationships and evaluate current systematics for 19 Oryza species. This gene in Oryza is approximately 402-bp long, and includes a 72-bp signal peptide region. A strict consensus tree shows Oryza brachyantha (FF) as the most basal species, followed by a polytomy of three clades that can be delineated based on genome composition: (1) the GG clade: Oryza granulata and Oryza meyeriana, (2) the EE clade: Oryza australiensis, and (3) the ABCD clade: the remaining Oryza species. Two subclades within the ABCD clade emerge, one containing species with the AA genome, the other with components of the BC and D genomes. Members of the AA subclade form a polytomy and were delineated by a single 3-base deletion. The African species Oryza punctata (BB) and the South American-endemic CCDD genome species form a strong lineage, pointing to a close genetic affinity of O. punctata to the missing DD genome donor. The strong association between the CC and BBCC species implies convergence at the gene level. The study supports the following sectional units of Oryza: Section Oryza (Series sativae and officinaliae), Section australiensis, Section Granulata, Section Brachyantha.

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Relationships betweenOryza species (Poaceae) based on 5S DNA sequences

Cited by 18 publications

References 31 publications

Molecular Phylogenetics of Calamus (Palmae) and Related Rattan Genera Based on 5S nrDNA Spacer Sequence Data

Molecular Phylogenetics of Calamus (Palmae) and Related Rattan Genera Based on 5S nrDNA Spacer Sequence Data

Molecular Diversity and Physical Mapping of 5S rDNA in Wild and Cultivated Oat Grasses (Poaceae: Aveneae)

Sequence variation in the gene encoding the 10-kDa prolamin in Oryza (Poaceae). I. Phylogenetic Implications

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