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Chinese Journal of Biological Control ›› 2024, Vol. 40 ›› Issue (4): 844-855.DOI: 10.16409/j.cnki.2095-039x.2023.11.003

• RESEARCH REPORTS • Previous Articles    

Differentiation and Expression Analysis of HGO Genes among Different Haplotypes of Cotton Aphids

YANG Xinyi, ZHANG Yaling, CAO Xue, JI Jing, ZHANG Shuai   

  1. College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
  • Received:2023-06-20 Published:2024-08-06

Abstract: Cotton aphid, Aphis gossypii Glover, differentiated into biotypes, showing obvious differences in host preference among the biotypes and differentiation at the genome level. In order to understand the evolution of hormone synthesis-related genes during the biotype differentiation of cotton aphids, farnesol dehydrogenase (HGO) of Hap1 and Hap3 cotton aphids was selected for analysis. According to the genome information of the two biotypes released by our laboratory, five AgosHGO genes were identified in each of the genomes of Hap1 and Hap3 cotton aphids, four of which are repetitive copies locate on chromosome A1 and the other one locates on chromosome A2. The position of the HGO gene on the chromosome, gene coding and sequence composition were analyzed to obtain relevant evolution information. The SRA data of cotton aphid published by NCBI were used to analyze the expression changes of HGO gene under different treatment conditions. There were differences in CDS sequence and gene structure of AgosHGO among different biotypes. In the Hap3 cotton aphid, a Gypsy transposon insertion is in the region of AgosHGO gene which distributes on chromosome A1.The analysis showed that the expression of AgosHGO was significantly different among different hosts but did not change with body color and temperature. The expression of AgosHGO3 was significantly down-regulated by 50% after acetamiprid treatment. The expression of AgosHGO5 in male aphid was significantly up-regulated in adult instar compared with the 1st—4th instar, up to 14—20 times. This study confirms that the HGO gene differentiates in Hap1 and Hap3 cotton aphids, its expression level can respond to its own development and changes in the external environment. It is of great significance to develop biological control technologies based on the regulation of hormone.

Key words: Aphis gossypii, population differentiation, farnesol dehydrogenase, genome, sequence structure

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