scholarly journals Genetic diversity of Pogonatherum paniceum (Lam.) Hack in Southwest China revealed by ISSR

2010 ◽  
Vol 9 (10) ◽  
pp. 1416-1422 ◽  
Author(s):  
Luo Zeng Bin ◽  
Zhuang Guo Qing ◽  
Ma Dan Wei ◽  
Chen Fang
Keyword(s):  
Genetic Diversity ◽  
Southwest China ◽  
Pogonatherum Paniceum

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 of the ORF5 Gene of Porcine Reproductive and Respiratory Syndrome Virus Isolates in Southwest China from 2007 to 2009

PLoS ONE ◽  
2012 ◽  
Vol 7 (3) ◽  
pp. e33756 ◽  
Author(s):  
Gefen Yin ◽  
Libo Gao ◽  
Xianghua Shu ◽  
Guishu Yang ◽  
Shuhao Guo ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Southwest China ◽  
Respiratory Syndrome Virus ◽  
Orf5 Gene ◽  
Virus Isolates

scholarly journals Genetic diversity among flue-cured tobacco cultivars on the basis of AFLP markers

2009 ◽  
Vol 45 (No. 4) ◽  
pp. 155-159 ◽  
Author(s):  
X.Z. Liu ◽  
C.S. He ◽  
Y.M. Yang ◽  
H.Y. Zhang
Keyword(s):  
Genetic Diversity ◽  
Yunnan Province ◽  
Southwest China ◽  
Germplasm Conservation ◽  
Research Centre ◽  
Aflp Data ◽  
Breeding Research ◽  
Polymorphic Bands ◽  
Relationship Of ◽  
The Relationship

AFLP analyses were used to assess the genetic similarity among selected accessions at the South China Tobacco Breeding Research Centre (Yunnan province, Southwest China). 154 AFLP polymorphic fragments out of 561 fragments were used to assess the genetic diversity among 28 tobacco accessions. The average number of polymorphic bands per AFLP primer pair was 15.4. AFLPs seemed to be an effective classification tools for germplasm conservation and breeding. Limited genetic variation was detected within this group of accessions. The relationship of cultivars was estimated by cluster analysis based on AFLP data.

Prevalence and genetic diversity of Entamoeba species infecting macaques in southwest China

2013 ◽  
Vol 112 (4) ◽  
pp. 1529-1536 ◽  
Author(s):  
Meng Feng ◽  
Junlong Cai ◽  
Xiangyang Min ◽  
Yongfeng Fu ◽  
Qing Xu ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Southwest China
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