Genetic diversity and evolution of two capsid protein genes of citrus tristeza virus isolates from China

被引：0
作者：
Guan-Wei Wu
Min Tang
Guo-Ping Wang
Feng-Yin Jin
Zuo-Kun Yang
Li-Jing Cheng
Ni Hong
机构：
[1] Huazhong Agricultural University,National Key Laboratory of Agromicrobiology
[2] Huazhong Agricultural University,Key Laboratory of Crop Disease Monitoring and Safety Control in Hubei Province, College of Plant Science and Technology
来源：
Archives of Virology | 2015年 / 160卷
关键词：
Coat Protein; Recombination Event; Coat Protein Gene; Citrus Tristeza Virus; Average Genetic Distance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The genetic diversity and population structure of citrus tristeza virus (CTV) isolates from China were investigated based on partial sequences spanning the C-terminal end of p61 and the complete sequences of the CPm and CP genes. Phylogenetic analysis revealed five known groups (RB, T30, T36, HA and VT) and one new group (VI) consisting of only Chinese CTV isolates. Incongruent phylogenetic trees coupled with recombination analysis suggested several recombination events in the CPm gene. Positive selection was detected at codon 9 of CPm and codons 31, 41 and 68 of CP. The widespread CTV subpopulation AT-1 found in China has a unique amino acid insertion at the C-terminus of p61, which could increase CTV population complexity with implications for the evolutionary history of the virus. Our results suggest relevant roles for gene flow, purifying selection and recombination in shaping the CTV population in China.
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页码：787 / 794
页数：7
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