Genetic diversity and population structure of Sugarcane streak mosaic virus in Yunnan province, China

2018 ◽  
Vol 43 (6) ◽  
pp. 514-519 ◽  
Author(s):  
Rong-Yue Zhang ◽  
Wen-Feng Li ◽  
Ying-Kun Huang ◽  
Chun-Hua Pu ◽  
Xiao-Yan Wang ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Mosaic Virus ◽  
Yunnan Province ◽  
Sugarcane Streak Mosaic Virus

scholarly journals Genetic diversity and population structure of rice stripe virus in China

2009 ◽  
Vol 90 (4) ◽  
pp. 1025-1034 ◽  
Author(s):  
Tai-Yun Wei ◽  
Jin-Guang Yang ◽  
Fu-Long Liao ◽  
Fang-Luan Gao ◽  
Lian-Ming Lu ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Yunnan Province ◽  
Southwest China ◽  
Eastern China ◽  
Rice Stripe Virus ◽  
Genetic Distances ◽  
Geographical Regions ◽  
Strong Negative Selection ◽  
Recent Outbreak

Rice stripe virus (RSV) is one of the most economically important pathogens of rice and is repeatedly epidemic in China, Japan and Korea. The most recent outbreak of RSV in eastern China in 2000 caused significant losses and raised serious concerns. In this paper, we provide a genotyping profile of RSV field isolates and describe the population structure of RSV in China, based on the nucleotide sequences of isolates collected from different geographical regions during 1997–2004. RSV isolates could be divided into two or three subtypes, depending on which gene was analysed. The genetic distances between subtypes range from 0.050 to 0.067. The population from eastern China is composed only of subtype I/IB isolates. In contrast, the population from Yunnan province (southwest China) is composed mainly of subtype II isolates, but also contains a small proportion of subtype I/IB isolates and subtype IA isolates. However, subpopulations collected from different districts in eastern China or Yunnan province are not genetically differentiated and show frequent gene flow. RSV genes were found to be under strong negative selection. Our data suggest that the most recent outbreak of RSV in eastern China was not due to the invasion of new RSV subtype(s). The evolutionary processes contributing to the observed genetic diversity and population structure are discussed.

scholarly journals Genetic Diversity and Natural Selection of Plasmodium vivax Duffy Binding Protein-II From China-Myanmar Border of Yunnan Province, China

2021 ◽  
Vol 12 ◽  
Author(s):  
Tian-Qi Shi ◽  
Hai-Mo Shen ◽  
Shen-Bo Chen ◽  
Kokouvi Kassegne ◽  
Yan-Bing Cui ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Natural Selection ◽  
Genetic Differentiation ◽  
Positive Selection ◽  
Plasmodium Vivax ◽  
Yunnan Province ◽  
Duffy Binding Protein ◽  
Synonymous Mutations ◽  
Selection Of

Malaria incidence has declined dramatically over the past decade and China was certified malaria-free in 2021. However, the presence of malaria in border areas and the importation of cases of malaria parasites are major challenges for the consolidation of the achievements made by China. Plasmodium vivax Duffy binding protein (PvDBP) performs a significant role in erythrocyte invasion, and is considered a promising P. vivax vaccine. However, the highly polymorphic region of PvDBP (PvDBP-II) impedes the development of blood-stage vaccine against P. vivax. In this study, we investigated the genetic diversity and natural selection of PvDBP-II among 124 P. vivax isolates collected from the China-Myanmar border (CMB) in Yunnan Province, China, during 2009–2011. To compare genetic diversity, natural selection, and population structure with CMB isolates, 85 pvdbp-II sequences of eastern Myanmar isolates were obtained from GenBank. In addition, global sequences of pvdbp-II were retrieved from GenBank to establish genetic differentiation relationships and networks with the CMB isolates. In total, 22 single nucleotide polymorphisms reflected in 20 non-synonymous and two synonymous mutations were identified. The overall nucleotide diversity of PvDBP-II from the 124 CMB isolates was 0.0059 with 21 haplotypes identified (Hd = 0.91). The high ratio of non-synonymous to synonymous mutations suggests that PvDBP-II had evolved under positive selection. Population structure analysis of the CMB and eastern Myanmar isolates were optimally grouped into five sub-populations (K = 5). Polymorphisms of PvDBP-II display that CMB isolates were genetically diverse. Mutation, recombination, and positive selection promote polymorphism of PvDBP-II of P. vivax population. Although low-level genetic differentiation in eastern Myanmar was identified along with the more effective malaria control measures, the complexity of population structure in malaria parasites has maintained. In conclusion, findings from this study advance knowledge of the understanding of the dynamic of P. vivax population, which will contribute to guiding the rational design of a PvDBP-II based vaccine.

scholarly journals The genetic diversity and population structure of domestic Aedes aegypti (Diptera: Culicidae) in Yunnan Province, southwestern China

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Qing-Ming Shi ◽  
Heng-Duan Zhang ◽  
Gang Wang ◽  
Xiao-Xia Guo ◽  
Dan Xing ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Aedes Aegypti ◽  
Yunnan Province ◽  
Southwestern China

Genetic diversity and population structure of Watermelon mosaic virus

2017 ◽  
Vol 124 (6) ◽  
pp. 601-610 ◽  
Author(s):  
Mohammad Hajizadeh ◽  
Hajareh Bahrampour ◽  
Jafar Abdollahzadeh
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Mosaic Virus ◽  
Watermelon Mosaic Virus

Characterization and genetic diversity of sugarcane streak mosaic virus causing mosaic in sugarcane

Virus Genes ◽  
2008 ◽  
Vol 36 (3) ◽  
pp. 553-564 ◽  
Author(s):  
R. Viswanathan ◽  
M. Balamuralikrishnan ◽  
R. Karuppaiah
Keyword(s):  
Genetic Diversity ◽  
Mosaic Virus ◽  
Sugarcane Streak Mosaic Virus

Genetic diversity and population structure of Sugarcane mosaic virus

2013 ◽  
Vol 171 (1) ◽  
pp. 242-246 ◽  
Author(s):  
Yongqiang Li ◽  
Ruiying Liu ◽  
Tao Zhou ◽  
Zaifeng Fan
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Mosaic Virus ◽  
Sugarcane Mosaic Virus

Genetic diversity and population structure of Populus yunnanensis revealed by SSR markers

2020 ◽  
Vol 52 (6) ◽  
Author(s):  
Anpei Zhou ◽  
Dan Zong ◽  
Peihua Gan ◽  
Yao Zhang ◽  
Dan Li ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Ssr Markers
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