DNA barcoding and phylogenetic analysis of leafhoppers associated with Aster Yellow disease on China aster, Marigold and Chrysanthemum

2020 ◽  
Vol 31 (2) ◽  
pp. 64-72
Author(s):  
Mahadeva Swamy Hanchipura Mallesh ◽  
Ramasamy Asokan ◽  
Hanamant Gadad ◽  
Samuel Duleep Kumar ◽  
Rajiv Kumar ◽  
...  
ZooKeys ◽  
2020 ◽  
Vol 954 ◽  
pp. 1-15
Author(s):  
Weixin Liu ◽  
Sergei Golovatch

A new species of glomeridellid millipede is described from Guizhou Province, southern China: Tonkinomeris huzhengkunisp. nov. This new epigean species differs very clearly in many structural details, being sufficiently distinct morphologically and disjunct geographically from T. napoensis Nguyen, Sierwald & Marek, 2019, the type and sole species of Tonkinomeris Nguyen, Sierwald & Marek, 2019, which was described recently from northern Vietnam. The genus Tonkinomeris is formally relegated from Glomeridae and assigned to the family Glomeridellidae, which has hitherto been considered strictly Euro-Mediterranean in distribution and is thus new to the diplopod faunas of China and Indochina. Tonkinomeris is re-diagnosed and shown to have perhaps the basalmost position in the family Glomeridellidae. Its relationships are discussed, both morphological and zoogeographical, within and outside the Glomeridellidae, which can now be considered as relict and basically Oriental in origin. Because of the still highly limited array of DNA-barcoding sequences of the COI mitochondrial gene available in the GenBank, the first molecular phylogenetic analysis of Glomerida attempted here shows our phylogram to be too deficient to consider meaningful.


2020 ◽  
Vol 31 (2) ◽  
pp. 73-80
Author(s):  
Rui Zou ◽  
Cong Liang ◽  
Mengmeng Dai ◽  
Xiaodong Wang ◽  
Xiuyue Zhang ◽  
...  

2020 ◽  
Vol 3 (2) ◽  
pp. 68
Author(s):  
I Gde Adi Suryawan Wangiyana

Aquilaria and Gyrinops are the primary agarwood producer on international trade. For authentication and standardization purposes, it is essential to carry DNA barcoding studies of these genera. DNA barcoding studies on plants need a database of several regions on the plant genome that could act as a barcoding marker. These DNA barcoding markers could be divided into Chloroplasts barcoding and Nuclear barcoding. Several markers have been used for DNA barcoding study of agarwood producer species, including trnL-trnF, matK, rbcL, rpoC1, ycf1 (Chloroplast barcoding), and ITS (Nuclear barcoding). This review breakdown the availability of those DNA barcoding markers on the online genebank database for Aquilaria and Gyrinops. Aquilaria genus has 12 species members, while Gyrinops genus has six species members. The sequence of region trnL-trnF is the only barcoding marker covering all 12 species members of Aquilaria and six species members of Gyrinops. Both ITS and matK have covered nine species among 12 total species members of Aquilaria. The rbcL, rpoC1, and ycf1, respectively, have covered eight, five, and four species members of Aquilaria. Most of the barcoding markers have covered three species members of Gyrinops except for ITS (5 species) and rpoC1 (1 species). However, Gyrinops members have no ycf1 sequence on genebank database. Based on sequence availability on the genebank database, it could be concluded that the trnL-trnF region is the most promising DNA barcoding marker for the Aquilaria and Gyrinops members especially for the phylogenetic analysis purpose.


2019 ◽  
Vol 20 ◽  
pp. 198-206 ◽  
Author(s):  
Rainer Breitling

The phylogenetic relationships and taxonomy of the crab spider genus Xysticus and its closest relatives (i.e., the tribe Coriarachnini, also including, e.g., Ozyptila, Coriarachne and Bassaniana) have long been controversial, with several alternative classifications being proposed, none of which has gained universal acceptance. As Coriarachnini is largely confined to the Holarctic region, the main target area of recent DNA barcoding projects for spiders, a large amount of genetic data for the group is now publicly available. The results of a phylogenetic analysis of this sequence dataset are largely congruent with earlier morphology-based results regarding the evolutionary structure of the group. In particular, they highlight the fact that Xysticus s. lat. is a paraphyletic assembly and that several species groups need to be placed in separate genera to achieve monophyly of Xysticus s. str. Similarly, Coriarachne and Bassaniana appear as independent clades rather than a joined monophyletic Coriarachne s. lat. In contrast, further subdivision of Ozyptila is not supported by the genetic data. Importantly, the analysis also shows that anapophysate members of Xysticus s. lat. form two widely separated groups: a primarily anapophysate division, also including Coriarachne and Bassaniana, at the base of Xysticus s. lat., and a secondarily anapophysate clade deeply nested within Xysticus s. str. This might explain some of the earlier difficulties when trying to define generally accepted subgroups within Xysticus s. lat. The phylogenetic scaffold based on barcode sequences is sufficiently dense and well resolved to attempt the tentative and provisional placement of the majority of species in Xysticus s. lat. in the independent genera Xysticus s. str., Bassaniodes, Psammitis and Spiracme as a starting point for a future more formal revision of the group.


2019 ◽  
Vol 144 (5) ◽  
pp. 363-374 ◽  
Author(s):  
Lumariz Hernandez Rosario ◽  
Juan O. Rodríguez Padilla ◽  
Desiree Ramos Martínez ◽  
Alejandra Morales Grajales ◽  
Joel A. Mercado Reyes ◽  
...  

The Solanaceae family is one of the largest and well-distributed plant families in the world. It contains species of agricultural and economical importance, such as Solanum tuberosum, Solanum melongena, Solanum lycopersicum, Nicotiana tabacum, and Capsicum annuum. In Puerto Rico, there are ≈46 species of Solanaceae of which six are endemic: Brunfelsia densifolia, Brunfelsia lactea, Brunfelsia portoricensis, Goetzea elegans, Solanum ensifolium, and Solanum woodburyi. Our objective was to use DNA barcoding to identify the Solanaceae species in Puerto Rico, including the endemics, and to assess the species relationships between them. To accomplish our objective, two chloroplast regions (psbA-trnH and matK) and a nuclear region [internal transcribed spacer (ITS)] were assessed. Pairwise distance and phylogenetic analysis demonstrate that DNA barcoding can be used to discriminate at the species level among these taxa in Puerto Rico. For all three markers, the genus that showed the highest pairwise distance between represented species was Solanum, whereas the genus that displayed the least was Capsicum. Phylogenetic trees of single and concatenated regions were generated from sequences obtained in this study and from data downloaded from the National Center for Biotechnology Information database. Our results show that this technique can be used to identify species with one, two, or three combinations of DNA barcode markers depending on the taxon. In addition, this is the first study to include the endemic species S. woodburyi in a molecular phylogenetic analysis, and it was found to have a close relationship with S. ensifolium, also endemic to Puerto Rico, and to Solanum bahamense from the Bahamas and Greater Antilles. Therefore, we suggest that S. woodburyi might be part of the Bahamense clade.


Author(s):  
Anna D. Temraleeva ◽  
Elena S. Krivina ◽  
Yury S. Bukin

The understanding of the impossibility of distinguishing algal species based on morphological features came with the development of DNA sequencing technology, which today is a necessary tool for defining species boundaries and testing traditional species concepts. The paper discusses popular approaches to species identification (DNA barcoding) and the description of new and revision of known species (DNA taxonomy) using molecular genetic methods. The requirements and limitations in their work are given, as well as examples of phylogenetic analysis of green algae from the clade Moewusinia and Parachlorella, including the genus Micractinium.


2016 ◽  
Vol 339 (3-4) ◽  
pp. 123-132 ◽  
Author(s):  
Asif Shabodin Tamboli ◽  
Swapnil Mahadeo Patil ◽  
Avinash Ramchandra Gholave ◽  
Suhas Kishor Kadam ◽  
Shreya Vijaykumar Kotibhaskar ◽  
...  

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