Plasmon analyses of
            <i>Triticum</i>
            (wheat) and
            <i>Aegilops</i>
            : PCR–single-strand conformational polymorphism (PCR-SSCP) analyses of organellar DNAs

Wang, Guizhi; Miyashita, Naohiko T.; Tsunewaki, Koichiro

doi:10.1073/pnas.94.26.14570

Cited by 116 publications

(94 citation statements)

References 36 publications

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“…We counted numbers of those plastome mutations for each of all possible plastome pairs, based on which their phylogenetic tree was constructed by the UPGMA method, with some data supplemented by Wang et al (1997). Using 1.5 mutations as the group-breaking number, the 47 Triticum-Aegilops accessions were classified into 16 plastome types (Fig.…”

Section: Structures Of Common Wheat Organellar Genomesmentioning

confidence: 99%

Plasmon analysis in the Triticum-Aegilops complex

Tsunewaki¹

2009

Breed. Sci.

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This paper reviews our results on plasmon analysis of the Triticum-Aegilops complex after presenting the background and pioneering work. 1) Genetic effects of 47 plasmons of Triticum-Aegilops accessions on 21 wheat characters were analyzed using 12 euplasmic and 551 alloplasmic lines, in which 12 common wheat genotypes and 47 plasmons were combined in all possible combinations, except for one lethal combination. Characteristics of the individual plasmons on wheat phenotypes were clarified, based on which they were classified into 15 types. 2) Plastome and chondriome diversities were studied by RFLP analyses of chloroplast (ct) and mitochondrial (mt) DNAs, respectively. Based on the data obtained, numbers of differential mutations in the plastomes and genetic distances for the chondriomes were estimated for all pairs of the plasmons, based on which their phylogenetic trees were constructed. 3) Combining the results of the above works, 47 plasmons were classified into 18 types plus five subtypes, to which plasmon symbols were assigned. 4) Differentiation of the plasmon at the diploid level and maternal lineages of the polyploid species became elucidated. 5) Referring to the genome symbols designated by previous workers, the genomeplasmon constitutions of all Triticum-Aegilops species were clarified, based on which species relationships of this complex became established, the first example of the generic level throughout the plant and animal kingdoms. 6) Origins of some polyploid species were shown to be more recent than some other relatives, three examples being Timopheevi vs. Emmer group of tetraploid wheat, Ae. triaristata vs. Ae. ovata of the Polyeides section and Ae. ventricosa vs. Ae. crassa of the Vertebrata section of Aegilops, the former being of more recent origin than the latter in each pair. 7) Possible sites of plasmagene mutations responsible for three plasmon-controlled traits were located on the plastome or chondriome phylogenetic tree. And finally, 8) some unsolved plasmon-related problems were pointed out.

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Section: Structures Of Common Wheat Organellar Genomesmentioning

confidence: 99%

Plasmon analysis in the Triticum-Aegilops complex

Tsunewaki¹

2009

Breed. Sci.

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“…Genetic studies of plasmons in Triticum have revealed that the plasmon of timopheevi wheat is distinct from that of emmer wheat (Tsunewaki 1996, Wang et al 1997. However, the intraspecific variation within timopheevi wheat has not yet been explored extensively.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and origin of timopheevi wheat inferred by chloroplast DNA fingerprinting

et al. 2009

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Domesticated timopheevi wheat (Triticum timopheevi) is an endemic crop of western Georgia in Transcaucasia. It has a distinct nuclear genome (2n = 28, AAGG) and is genetically isolated from other wheat species. To clarify the genetic diversity and the domestication of this interesting wheat, we analyzed molecular variation at 23 microsatellite loci in the chloroplast genome. Allelic diversity was evaluated using 94 accessions representing domesticated timopheevi wheat (T. timopheevi), wild timopheevi wheat (T. araraticum), and wild emmer wheat (T. dicoccoides). The average diversity index (H) in T. araraticum (0.206) was smaller than that in T. dicoccoides (0.284). No polymorphisms were detected among the six accessions of T. timopheevi, suggested a monophyletic origin of domesticated timopheevi wheat. Phylogenetic analyses of the plastotypes revealed clear differences between the chloroplast DNA of timopheevi wheat and emmer wheat, and thus supported the hypothesis that these two wheat species originated independently. None of the T. araraticum plastotypes collected in Transcaucasia were closely related to the T. timopheevi plastotype. On the other hand, the plastotypes found in northern Syria and southern Turkey showed closer relationships with T. timopheevi. These results suggested that the domestication of timopheevi wheat might have occurred in the region including southern Turkey and northern Syria.

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“…Analysis of organelle DNA in Ae. speltoides indicates that it may be the maternal (cytoplasmic) donor of all polyploid wheats (34).…”

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confidence: 99%

Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of the Triticum / Aegilops complex and the evolutionary history of polyploid wheat

Huang

Sirikhachornkit

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

578

468

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The classic wheat evolutionary history is one of adaptive radiation of the diploid Triticum͞Aegilops species (A, S, D), genome convergence and divergence of the tetraploid (Triticum turgidum AABB, and Triticum timopheevii AAGG) and hexaploid (Triticum aestivum, AABBDD) species. We analyzed Acc-1 (plastid acetyl-CoA carboxylase) and Pgk-1 (plastid 3-phosphoglycerate kinase) genes to determine phylogenetic relationships among Triticum and Aegilops species of the wheat lineage and to establish the timeline of wheat evolution based on gene sequence comparisons.

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Plasmon analyses of Triticum (wheat) and Aegilops : PCR–single-strand conformational polymorphism (PCR-SSCP) analyses of organellar DNAs

Cited by 116 publications

References 36 publications

Plasmon analysis in the Triticum-Aegilops complex

Plasmon analysis in the Triticum-Aegilops complex

Genetic diversity and origin of timopheevi wheat inferred by chloroplast DNA fingerprinting

Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of the Triticum / Aegilops complex and the evolutionary history of polyploid wheat

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