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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2021年58 No.6

Genetic diversity of newly established, invasive Tuta absoluta populations in China based on mitochondrial COⅠ gene variation
Author of the article:MA Lin LI Xiao-Wei GUO Wen-Chao WANG Shu-Ming WANG Tian-Zhen Lü Yao-Bin
Author's Workplace:College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; Institute of Microbial Application, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China; Yuxi Plant Protection and Quarantine Station, Yuxi 653100, China
Key Words:invasive species; Tuta absoluta; COⅠgene; genetic diversity
Abstract:
[Objectives]  The tomato leaf miner, Tuta absoluta, is an invasive global pest that causes severe damage to tomato crops. Recently recorded in Xinjiang and Yunnan, this species poses a significant threat to tomato production in China. The objectives of this study were to investigate the genetic diversity and phylogenetic relationships of the two geographic populations of T. absoluta in China, and their relationships with other populations. [Methods]  The genetic diversity and phylogenetic relationships of the Xinjiang and Yunnan T. absoluta populations, and those of populations of this pest in different countries and regions, were analyzed based on mitochondrial COⅠgene variation. [Results]  The results show that a total of 55 COⅠ sequences from the Xinjiang and Yunnan populations were identical, with no genetic variation within, or between, populations. The genetic diversity of T. absoluta from different countries and regions was also extremely low, with only 4 haplotypes identified. Haplotype 1 was widely distributed and shared by all locations. Haplotypes 2 and 3 were only found in Kenya and haplotype 4 was only found in Peru. Phylogenetic analysis showed no evidence of geographical differentiation among populations. [Conclusion]  These results confirm the global genetic homogeneity of T. absoluta. The lack of genetic variation between the Xinjiang and Yunnan populations is useful information for management.
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