Insect Science (2005) 12, 155-162

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Min Shi and Xue-Xin Chen (2005)
Molecular differentiation of the microgastrine species commonly found in paddy fields from Southeast Asia, with additional data on their phylogeny (Hymenoptera: Braconidae)
Insect Science 12 (3), 155-162
Abstract: Partial DNA sequences of three genes, that is, mitochondrial large ribosomal subunit (16S), nuclear large ribosomal subunit (28S D2) and mitochondrial NADH1 dehydrogenase (NADH1) gene, were sequenced from different micro gastrine species (Braconidae: Microgastrinae) collected fresh from paddy fields. The DNA sequences were used to determine the extent of sequence variation among species in order to evaluate the specific status of each species. Cladistic analysis was also used to infer a phylogenetic relationship among these species. The results showed that sequence divergence among species of the same genus Cotesia was much lower than those among different genera, such as Cotesia, Exoryza and Apanteles; the sequence similarity of 16S rDNA andNADH1 genes between Cotesia sp. and C. chilonis was higher than that between C. sp. and C. ruficrus. Phylogenetic analyses suggested that four species of Cotesia were always grouped in the same clade regardless of using different analysis methods; Cotesia sp. and C. chilonis are more closely related to each other than to C. ruficrus, different from previous morphological results. Additionally, sequence analyses indicated that NADH1 gene has more parsimony informative characters than 28S rDNA D2 and 16S rDNA at the species-level analysis, indicating that NADH1 gene might be a useful marker for species-level analysis.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Xue-Xin Chen

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
molecular biology - genes

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Cotesia chilonis (parasitoid)
Cotesia ruficrus (parasitoid)
Apanteles (genus - parasitoids)