ITS phylogeny of West Asian Heracleum species and related taxa of Umbelliferae–Tordylieae W.D.J.Koch, with notes on evolution of their psbA-trnH sequences

Logacheva, Maria D.; Valiejo‐Roman, Carmen M.; Пименов, М. Г.

doi:10.1007/s00606-007-0619-x

Cited by 50 publications

(40 citation statements)

References 21 publications

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“…Inversions in the trnH-psbA intergenic spacer have been reported in a number of taxa (e.g. Logacheva et al, 2008;Sang et al, 1997) and their utility as a phylogenetic marker was positively discussed (Bain and Jansen, 2006). However, Origanum species seem to be polymorphic for the inversion described, with both configurations of the loop region present whenever more than one trnH-psbA sequence per species was available for alignment (in case of O. majorana, O. onites, O. vulgare).…”

Section: Intra-generic Chloroplast Dna Variabilitymentioning

confidence: 89%

The complete chloroplast genome of Origanum vulgare L. (Lamiaceae)

Lukas

Novak

2013

Gene

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Section: Intra-generic Chloroplast Dna Variabilitymentioning

confidence: 89%

The complete chloroplast genome of Origanum vulgare L. (Lamiaceae)

Lukas

Novak

2013

Gene

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“…The amplification efficiency of psb A- trn H in Dioscorea was moderate and its identification accuracy was only 11.63%, therefore it is not a suitable candidate as a DNA barcode for Dioscorea , as it is for other species [43], [44]. In addition, the presence of a poly-A/T in this region often reduces the success rate of DNA sequencing.…”

Section: Discussionmentioning

confidence: 99%

DNA Barcoding the Dioscorea in China, a Vital Group in the Evolution of Monocotyledon: Use of matK Gene for Species Discrimination

et al. 2012

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Background Dioscorea is an important plant genus in terms of food supply and pharmaceutical applications. However, its classification and identification are controversial. DNA barcoding is a recent aid to taxonomic identification and uses a short standardized DNA region to discriminate plant species. In this study, the applicability of three candidate DNA barcodes (rbcL, matK, and psbA-trnH) to identify species within Dioscorea was tested.Methodology/Principal FindingsOne-hundred and forty-eight individual plant samples of Dioscorea, encompassing 38 species, seven varieties and one subspecies, representing majority species distributed in China of this genus, were collected from its main distributing areas. Samples were assessed by PCR amplification, sequence quality, extent of specific genetic divergence, DNA barcoding gap, and the ability to discriminate between species. matK successfully identified 23.26% of all species, compared with 9.30% for rbcL and 11.63% for psbA-trnH. Therefore, matK is recommended as the best DNA barcoding candidate. We found that the combination of two or three loci achieved a higher success rate of species discrimination than one locus alone. However, experimental cost would be much higher if two or three loci, rather than a single locus, were assessed.ConclusionsWe conclude that matK is a strong, although not perfect, candidate as a DNA barcode for Dioscorea identification. This assessment takes into account both its ability for species discrimination and the cost of experiments.

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“…There are two geographical distribution centers for Heracleum . One is the Caucasus region, which has 30 species (Logacheva et al, 2008), and the other is the Hengduan Mountains, with 26 species and one variety (Shan, 1992). The climate of the Caucasus region is continental temperate.…”

Section: Discussionmentioning

confidence: 99%

Karyotype and cytogeography of the genusHeracleum(Apiaceae) in the Hengduan Mountains

Deng

et al. 2009

J of Sytematics Evolution

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In the present study, the karyotypes of 34 populations belonging to 11 species and one variety of Heracleum from the Hengduan Mountains in China were examined. Chromosome numbers and the karyotypes of three species (H. souliei, H. kingdoni, and H. wenchuanense) are reported for the first time, as are the karyotypes of H. moellendorffii and H. henryi (tetraploid). Populations of H. candicans, H. franchetii, and H. kingdoni in the Hengduan Mountains were found to consist of a mixture of diploid and tetraploid plants. Except for four species of Heracleum, namely H. candicans, H. franchetii, H. henryi, and H. kingdoni, which have both diploid and tetraploid karyotypes, all other species of Heracleum are were found to be diploid. All karyotypes were found to belong to the 2A type of Stebbins, with the exception of H. candicans var. obtusifolium, which belongs to 2B, and H. hemsleyanum and H. franchetii (Mt. Dujuan, Daocheng, Sichuan, China), which belong to 1A. There was only a slight difference in the karyotype asymmetry index, which suggests a close kinship for species of Heracleum and that the entire phylogenetic development of Heracleum is relatively primitive. Species that exhibited advanced morphological features were also more advanced in karyotype structure, with the order of karyotype evolution being 1A→2A→2B. This phenomenon indicates that the species distributed in the Hengduan Mountains have not diverged completely and that the Hengduan Mountains are a relatively young and active area for the evolution of Heracleum. Polyploidization in Heracleum may be an important evolutionary mechanisms for some species, generating diversity. The biological attributes, distribution range, and the geological history of the genus have all played a part in accelerating the evolution through polyploidization or aneuploidization. It is known that as the distribution latitude of Heracleum decreases from north to south, the chromosome number, ploidy level, and asymmetry structure appear to increase. In the Hengduan Mountains, these tendencies are also evident. Finally, based on all the available cytogeographic data, we speculate that the more advanced tetraplont or aneuploid species of Heracleum in India may be derived from early diplont species that were distributed in the Caucasus region and Hengduan Mountains. The dispersal of Heracleum was from Eurasia to India, because this correlates with the emergence of the Himalayan Mountains through tectonic movement. Thus, the Hengduan Mountains are not only a center of diversity for Heracleum, but also a center of active speciation in modern times.

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ITS phylogeny of West Asian Heracleum species and related taxa of Umbelliferae–Tordylieae W.D.J.Koch, with notes on evolution of their psbA-trnH sequences

Cited by 50 publications

References 21 publications

The complete chloroplast genome of Origanum vulgare L. (Lamiaceae)

The complete chloroplast genome of Origanum vulgare L. (Lamiaceae)

DNA Barcoding the Dioscorea in China, a Vital Group in the Evolution of Monocotyledon: Use of matK Gene for Species Discrimination

Karyotype and cytogeography of the genusHeracleum(Apiaceae) in the Hengduan Mountains

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