›› 1999, Vol. 42 ›› Issue (3): 241-247.

• RESEARCH PAPERS • Previous Articles     Next Articles

Sequence of the 18S ribosomal RNA gene of cotton bollworm (Helicoverpa armigera) and molecular systematics analysis

Wang Ying, Chen Xiao-feng,Liu Wei,Zhou Hong-zhang,Zhao Heng   

  • Online:1999-08-20 Published:1999-08-20

Abstract: The entire sequence of the 18S ribosomal RNA gene (18S rDNA) of the cotton bollworm (Helicoverpa armigera) has been cloned and sequenced. As compared with conservative homologous sequences of other six insects from different Orders, it is found that the 18S rDNA of the cotton bollworm (Lepidoptera) is structurally more similar to that of the fruitfly Drosophila melanogaster (Diptera), suggesting a closer phylogenetic relationship between the two Orders. Phylogenetic relationship analysis reveals the Strepsiptera is closer to Collembola, and indicates being an independent ancient branch in phylogeny.

Key words: 18S rDNA, Helicoverpa armigera, molecular systematics