The sequence of the mitochondrial DNA（mtDNA） of the assassin bug Agriosphodrus dohrni from the reduviid subfamily Harpactorinae has been *** molecule is 16,470 bp in length with an A+T content of 72.2%,contains the ...
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The sequence of the mitochondrial DNA（mtDNA） of the assassin bug Agriosphodrus dohrni from the reduviid subfamily Harpactorinae has been *** molecule is 16,470 bp in length with an A+T content of 72.2%,contains the typical 13 protein-coding,22 tRNAs,two ribosomal RNAs and a control *** of this sequence with the other two completely sequenced reduviid mtDNAs（Triatoma dimidiata and Valentia hoffmanni） showed that gene order and orientation are identical to the ancestral arrangement,and nucleotide composition,codon usage,and amino acid composition are very similar,which show a much higher bias towards A+*** protein coding genes use standard initiation codons（methionine and isoleucine）,except ND1 started with *** tRNAs have the typical clover-leaf structure,except the dihydrouridine（DHU） arm of tRNA forms a simple *** of secondary structures of the two mitochondrial ribosomal subunits showed that the sequence and structure of rrnL was more conservative than that of rrnS in the sequenced assassin *** presence of structural elements in the control region was also discussed,with emphasis on their potential implications in the regulation of replication and/or transcription of the reduviid mitochondrial genome.
In order to understand morphological adaptation of aphids to related host plants, morphological variations of 122 field clones from ten aphid species with different gall types(gall, pseudo-gall,no-gall) and feeding si...
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In order to understand morphological adaptation of aphids to related host plants, morphological variations of 122 field clones from ten aphid species with different gall types(gall, pseudo-gall,no-gall) and feeding sites(leaves,twigs,stem,more than two sites) on Populus were studied by general descriptive statistics,canonical variates analysis(CVA) and clustering analysis based on *** results revealed that morphological differences of aphid clones were associated with the gall types and feeding sites,and the aphid clones can be divided into six groups, leaf gall dweller,twig gall dweller,leaf pseudo-gall dweller,multi-site livers,leaf livers and bark *** scores of the first two canonical variates(CVs) clearly separated the gall dwellers from free livers,separated the true gall dwellers from pseudo-gall dwellers both on leaves distinctly,and provided evident separation among different feeding sites of free livers,respectively,in three CVAs in *** addition,using clustering analysis,the gall dwelling aphid clones showed a relatively large phenotypic distance among leaves to twigs and pseudo galls to true *** statistical analysis further supported the *** separations of aphid clones in the CVAs and clustering analysis,and variations of morphological characters among different clusters of aphids suggest morphological adaptation for the aphids to gall types and feeding sites on *** ultimate rostral segment and hind tarsal segments II may be the most essential *** gall dwellers with longer ultimate rostral segment and bark livers with shorter tarsal segment than other groups with,those were all in order to getting more alimentation and attaching better on rough surface of host *** study suggested that the research on phylogenetic reconstruction and traditional taxonomy of insects by morphology must consider morphological adaptations,and the research on insect-host plant relationship must take acc
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