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June 2014 Blog Posts (4)

Universal DNA barcode preferred for animal species identification

A well-informed choice of genetic locus is central to DNA barcoding.Current DNA barcoding in animals involves the use of the 5’ half of themitochondrial cytochrome oxidase 1 gene (CO1) to diagnose and delimit species.However, there is no compelling a priori reason for the exclusive focus on this region,and it has been shown that it performs poorly for certain animal groups. To explore alternative mitochondrial barcoding regions, this research compared the efficacy of the universal CO1 barcode… Continue

Added by Chao-Dong ZHU on June 24, 2014 at 12:05am — 1 Comment

Heuristic optimization for global species clustering of DNA sequence data from multiple loci

Clustering molecular sequences based on the level of similarity can give information on the number and diversity of species, and is a very commonly used approach for assessing species level diversity in many taxonomic groups. The number of available multi-gene datasets is growing rapidly, although the literature is currently dominated with single gene analyses, with remarkably little discussion of integrated species clustering using multi-locus…

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Added by Chao-Dong ZHU on June 23, 2014 at 11:38pm — No Comments

Diversification and vicariance in two species complexes of Tomocerus (Collembola) from China

The Qinling-Dabie Mountains-Huai River line/zone has been traditionally regarded as the geographical, climatic, agricultural and demographic boundary between north and south regions in eastern China. Human activities are frequently in eastern China, where the topographical differences are relatively small particularly in eastern plain region. The north-south boundary were considered to have weaker impacts on geographical patterns of fauna than Himalayan…

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Added by Chao-Dong ZHU on June 23, 2014 at 11:37pm — No Comments

A Protocol for Species Delineation of Public DNA Databases was developed by Chao-Dong ZHU’s lab

Public DNA databases are composed of data from many different taxa. However, the taxonomic annotation on sequences is not always complete. This impedes the utilization of mined data for species-level applications. There is much ongoing work on species identification and delineation based on the molecular data itself. Applying species clustering to whole databases requires consolidation of results from numerous undefined gene regions, and introduces…

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Added by Chao-Dong ZHU on June 23, 2014 at 11:36pm — No Comments

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