Comprehensive DNA barcode reference library and optimization of genetic divergence threshold facilitate the exploration of species diversity of green lacewings (Neuroptera: Chrysopidae)  

作　　者：Yan Lai Kaiyu Li Xingyue Liu 

机构地区：[1]Deparment of Entomology,Cllege of Plant Protection,China Agricultural University,Bejing,China [2]College of Bioogical Sciencs,China Agricultural University,Beijing,China

出　　处：《Insect Science》2024年第2期613-632,共20页昆虫科学（英文版）

基　　金：supported by the Beijing Natural Science Foundation(No.5212011);the National Natural Science Foundation of China(Nos.32170448,32130012);the 2115 Talent Development Program of China Agricultural University;the National Animal Collection Resource Center,China.

摘　　要：Chrysopidae are a family of Neuroptera of significant importance in biocontrol against agricultural pests because of their predatory larvae.Currently,the taxonomy of Chrysopidae lacks a comprehensive revision,which impedes the exploration of species diversity as well as the selection and the conservation of green lacewings as biocontrol agents.We have established a DNA barcode reference library of the Chinese green lacewings based on an approximately complete sampling(95.63%)in 25 of the 34 provincial regions in China,comprising 1119 barcodes of 25 genera and 197 species(representing 85%genera and 43.62%species from China).Combining other 1049 high quality green lacewing DNA barcodes,we first inferred the optimal threshold of interspecific genetic divergence(1.87%)for successful species identification in multiple simulated scenarios based on present data.We further inferred the threshold of genetic divergence(7.77%)among genera with biocontrol significance.The inference and performance of the threshold appears to be mainly associated with the completeness of sampling,the proportion of closely related species,and the analytical approaches.Six new combinations,Apertochrysa platypa(Yang&Yang,1991)comb.nov.,Apertochrysa shennongana(Yang&Wang,1990)comb.nov.,Apertochrysa pictifacialis(Yang,1988)comb.nov.,Apertochrysa helana(Yang,1993)comb.nov.,Plesiochrysa rosulata(Yang&Yang,2002)comb.nov.,and Signochrysa hainana(Yang&Yang,1991),are proposed according to integrative species delimitation.Our library and optimal threshold will effectively facilitate the exploration of species diversity of green lacewings.Our study also provides a methodological reference in molecular delimitation of other insects.

关 键 词：CHRYSOPIDAE DNA barcode genetic distance optimal threshold species delimitation 

分 类 号：Q94[生物学—植物学]