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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2020年57 No.6

Phylogeny of the Pseudococcidae based on COⅠ gene sequence variation
Author of the article:LI Yan WANG Xu-Bo WU San-An
Author's Workplace:College of Forestry, Beijing Forestry University, Beijing 100083, China; College of Biodiversity Conservation, Southwest Forestry University, Kunming 650224, China
Key Words:COⅠ; HCO-LCO region; region 2; Pseudococcidae
Abstract:
[Objectives]  To identify COⅠ sequence regions useful for resolving the taxonomy of the Pseudococcidae (mealybugs) and thereby improve understanding of the phylogenetic relationships within this family. Mealybugs are Hemipteran insects that feed on plant sap, and most are agricultural and forestry pests. The COⅠ gene is commonly used in molecular phylogeny and is often divided into two regions according to different primers; the HCO-LCO region and region 2. [Methods]  Sequence information on both the HCO-LCO region and region 2 from 48 Mealybugs was downloaded from the GenBank database. The genetic distance, barcode gap and BCM were calculated and a phylogenetic tree constructed using the ML method. [Results]  The rate of accurate species identification using the HCO-LCO region was higher than that using region 2. Genetic distances estimated based on HCO-LCO region variation increased with taxonomic level but those based on region 2 ranked the maximum genetic distance between species as greater than that between genera. A phylogenetic tree based on HCO-LCO region variation was more consistent with the morphological classification than one based on region 2. [Conclusion]  The HCO-LCO region was more useful than region 2 for species identification, and better reflects the developmental and evolutionary relationships among the Pseudococcidae than region 2.
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