scholarly journals Genetic Diversity of Chinese Soybean mosaic virus Strains and Their Relationships with Other Plant Potyviruses Based on P3 Gene Sequences

2014 ◽  
Vol 13 (10) ◽  
pp. 2184-2195
Author(s):  
Qing-hua YANG ◽  
Kai LI ◽  
Hai-jian ZHI ◽  
Jun-yi GAI
Keyword(s):  
Genetic Diversity ◽  
Mosaic Virus ◽  
Soybean Mosaic Virus ◽  
Gene Sequences ◽  
Virus Strains

Inheritance of Resistance to Soybean Mosaic Virus Strains SC4 and SC8 in Soybean

2012 ◽  
Vol 38 (2) ◽  
pp. 202-209 ◽  
Author(s):  
Da-Gang WANG ◽  
Ying MA ◽  
Ning LIU ◽  
Gui-Jie ZHENG ◽  
Zhong-Lu YANG ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Soybean Mosaic Virus ◽  
Inheritance Of Resistance ◽  
Virus Strains

Inheritance in Soybean of Resistant and Necrotic Reactions to Soybean Mosaic Virus Strains

Crop Science ◽  
1994 ◽  
Vol 34 (2) ◽  
pp. 414-422 ◽  
Author(s):  
P. Chen ◽  
G. R. Buss ◽  
C. W. Roane ◽  
S. A. Tolin
Keyword(s):  
Mosaic Virus ◽  
Soybean Mosaic Virus ◽  
Virus Strains

scholarly journals Analysis of Soybean mosaic virus genetic diversity in Iran allows the characterization of a new mutation resulting in overcoming Rsv4-resistance

2013 ◽  
Vol 94 (11) ◽  
pp. 2557-2568 ◽  
Author(s):  
Akbar Ahangaran ◽  
Mina Koohi Habibi ◽  
Gholam-Hossein Mosahebi Mohammadi ◽  
Stephan Winter ◽  
Fernando García-Arenal
Keyword(s):  
Genetic Diversity ◽  
Amino Acid ◽  
Mosaic Virus ◽  
Phylogenetic Analyses ◽  
Soybean Mosaic Virus ◽  
Biologically Active ◽  
Site Directed Mutagenesis ◽  
Sequence Comparisons ◽  
Strong Negative Selection

The genetic variation and population structure of Soybean mosaic virus (SMV) in Iran was analysed through the characterization of a set of isolates collected in the soybean-growing provinces of Iran. The partial nucleotide sequence of these isolates showed a single, undifferentiated population with low genetic diversity, highly differentiated from other SMV world populations. These traits are compatible with a population bottleneck associated with the recent introduction of SMV in Iran. Phylogenetic analyses suggest that SMV was introduced into Iran from East Asia, with at least three introduction events. The limited genetic diversification of SMV in Iran may be explained by strong negative selection in most viral genes eliminating the majority of mutations, together with recombination purging deleterious mutations. The pathogenicity of Iranian SMV isolates was typified on a set of soybean differential lines either susceptible or carrying different resistance genes or alleles to SMV. Two pathotypes were distinguished according to the ability to overcome Rsv4 resistance in line V94-5152. Amino acid sequence comparisons of virulent and avirulent isolates on V94-5152 (Rsv4), plus site-directed mutagenesis in a biologically active cDNA clone, identified mutation S1053N in the P3 protein as the determinant for virulence on V94-5152. Codon 1053 was shown to be under positive selection, and S1053N-determined Rsv4-virulence occurred in isolates with different genealogies. The V94-5152 (Rsv4)-virulence determinant in Iranian isolates maps into a different amino acid position in the P3 protein than those previously reported, indicating different evolutionary pathways towards resistance breaking that might be conditioned by sequence context.

scholarly journals A MADS-box gene is involved in soybean resistance to multiple Soybean mosaic virus strains

2021 ◽  
Author(s):  
Qiuyan Ren ◽  
Hua Jiang ◽  
Wenyang Xiang ◽  
Yang Nie ◽  
Song Xue ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Soybean Mosaic Virus ◽  
Mads Box ◽  
Mads Box Gene ◽  
Soybean Resistance ◽  
Virus Strains

scholarly journals Identification and Distribution of Soybean mosaic virus Strains in Southern China

Plant Disease ◽  
2010 ◽  
Vol 94 (3) ◽  
pp. 351-357 ◽  
Author(s):  
K. Li ◽  
Q. H. Yang ◽  
H. J. Zhi ◽  
J. Y. Gai
Keyword(s):  
Mosaic Virus ◽  
Northeast China ◽  
Southern China ◽  
Virulent Strain ◽  
Soybean Mosaic Virus ◽  
Similarity Coefficient ◽  
The Other ◽  
Differential Cultivar ◽  
Virus Strains ◽  
Single Lesion

From 1,417 leaf samples with Soybean mosaic virus (SMV)-like symptoms collected from about 1,500 fields of 117 counties of 13 provinces in Southern China during 2004 to 2006, 201 SMV isolates were obtained after biological purification with single-lesion isolation and serological determination. Based on disease reactions on 10 differentials used in China as a representative from various reported differential cultivar systems, the isolates were grouped into 12 strains. Among them, eight were the same as those previously reported from Northeast China and the Huang-Huai Valleys while the other four were new and were designated as SC18, SC19, SC20, and SC21. Strains SC15 and SC18, which were predominant and widespread in Southern China, accounted for 32.3 and 26.4% of the total isolates and were distributed in 9 and 10 provinces, respectively. Thus far, 21 strains have been identified in the three soybean-producing regions in China under the uniform differentials system. According to their responses on the 10 differentials, the strains were clustered into five groups at similarity coefficient 0.6. Among them, SC15 in cluster V is the most virulent strain because it infects all differentials. Therefore, specific attention should be placed on control of its prevalence in soybean production.

scholarly journals Genetic Diversity among Lassa Virus Strains

2000 ◽  
Vol 74 (15) ◽  
pp. 6992-7004 ◽  
Author(s):  
Michael D. Bowen ◽  
Pierre E. Rollin ◽  
Thomas G. Ksiazek ◽  
Heather L. Hustad ◽  
Daniel G. Bausch ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Amino Acid ◽  
Sierra Leone ◽  
Phylogenetic Analyses ◽  
Full Length ◽  
Amino Acid Difference ◽  
Lassa Virus ◽  
Gene Sequences ◽  
Np Gene ◽  
Virus Strains

ABSTRACT The arenavirus Lassa virus causes Lassa fever, a viral hemorrhagic fever that is endemic in the countries of Nigeria, Sierra Leone, Liberia, and Guinea and perhaps elsewhere in West Africa. To determine the degree of genetic diversity among Lassa virus strains, partial nucleoprotein (NP) gene sequences were obtained from 54 strains and analyzed. Phylogenetic analyses showed that Lassa viruses comprise four lineages, three of which are found in Nigeria and the fourth in Guinea, Liberia, and Sierra Leone. Overall strain variation in the partial NP gene sequence was found to be as high as 27% at the nucleotide level and 15% at the amino acid level. Genetic distance among Lassa strains was found to correlate with geographic distance rather than time, and no evidence of a “molecular clock” was found. A method for amplifying and cloning full-length arenavirus S RNAs was developed and used to obtain the complete NP and glycoprotein gene (GP1 and GP2) sequences for two representative Nigerian strains of Lassa virus. Comparison of full-length gene sequences for four Lassa virus strains representing the four lineages showed that the NP gene (up to 23.8% nucleotide difference and 12.0% amino acid difference) is more variable than the glycoprotein genes. Although the evolutionary order of descent within Lassa virus strains was not completely resolved, the phylogenetic analyses of full-length NP, GP1, and GP2 gene sequences suggested that Nigerian strains of Lassa virus were ancestral to strains from Guinea, Liberia, and Sierra Leone. Compared to the New World arenaviruses, Lassa and the other Old World arenaviruses have either undergone a shorter period of diverisification or are evolving at a slower rate. This study represents the first large-scale examination of Lassa virus genetic variation.

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