scholarly journals Population genetics and sympatric divergence of the freshwater gudgeon, Gobiobotia filifer , in the Yangtze River inferred from mitochondrial DNA

2019 ◽  
Vol 10 (1) ◽  
pp. 50-58
Author(s):  
Dengqiang Wang ◽  
Lei Gao ◽  
Huiwu Tian ◽  
Weiwei Dong ◽  
Xinbin Duan ◽  
...  
Keyword(s):  
Population Genetics ◽  
Mitochondrial Dna ◽  
Yangtze River ◽  
The Yangtze River

scholarly journals Dynamic genetic diversity and population structure of Coreius guichenoti

ZooKeys ◽  
2021 ◽  
Vol 1055 ◽  
pp. 135-148
Author(s):  
Dongqi Liu ◽  
Feng Lan ◽  
Sicai Xie ◽  
Yi Diao ◽  
Yi Zheng ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Mitochondrial Dna ◽  
Population Structure ◽  
Genetic Differentiation ◽  
Yangtze River ◽  
Fish Passage ◽  
The Yangtze River ◽  
Artificial Breeding ◽  
Significant Difference ◽  
High Elevations

To investigate the genetic effects on the population of Coreius guichenoti of dam constructions in the upper reaches of the Yangtze River, we analyzed the genetic diversity and population structure of 12 populations collected in 2009 and 2019 using mitochondrial DNA (mtDNA) control regions. There was no significant difference in genetic diversity between 2009 and 2019 (P > 0.05), but the population structure tended to become stronger. Genetic differentiation (FST) among five populations (LX, BB, YB, SF and JA) collected in 2009 was not significant (P > 0.05). However, some populations collected in 2019 were significantly differentiated (P < 0.05), indicating that the population structure has undergone change. A correlation analysis showed that the genetic diversity of the seven populations collected in 2019 was significantly negatively correlated with geographical height (r = −0.808, P = 0.028), indicating that the populations at high elevations were more vulnerable than those at low elevations. In order to prevent the further decrease of genetic diversity and population resources, some conservation and restoration suggestions, such as fish passage and artificial breeding, are put forward.

Genetic structure of Chinese sucker population Myxocyprinus asiaticus in the Yangtze River based on mitochondrial DNA marker

2004 ◽  
Vol 70 (3) ◽  
pp. 412-420 ◽  
Author(s):  
Yuhua SUN ◽  
Siyang LIU ◽  
Gang ZHAO ◽  
Shunping HE ◽  
Qingjiang WU ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Structure ◽  
Yangtze River ◽  
Dna Marker ◽  
The Yangtze River ◽  
Myxocyprinus Asiaticus ◽  
Chinese Sucker

Mitochondrial DNA diversity, population structure, and conservation genetics of four native carps within the Yangtze River, China

1997 ◽  
Vol 54 (1) ◽  
pp. 47-58 ◽  
Author(s):  
G Lu ◽  
S Li ◽  
L Bernatchez
Keyword(s):  
Mitochondrial Dna ◽  
Population Structure ◽  
Grass Carp ◽  
Yangtze River ◽  
Juvenile Fish ◽  
Silver Carp ◽  
Bighead Carp ◽  
The Yangtze River ◽  
Black Carp ◽  
Dna Diversity

Silver carp (Hypophthalmichthys molitrix), grass carp (Ctenopharyngodon piceus), bighead carp (Aristichthys nobilis), and black carp(Mylopharyngodon piceus) rank first, second, fourth, and seventh in world fish production. In China, the Yangtze River harbours the most important natural populations of these species. We performed a polymerase chain reaction - restriction fragment length poymorphism analysis on 365 juvenile fish representing three nursery grounds to provide a first assessment of the mitochondrial DNA diversity in these species and test the hypothesis that they are composed of more than one genetic stock. The mitochondrial DNA diversity was high in silver, bighead, and black carp, and much less in grass carp. Analysis of heterogeneity of genotype frequency, fixation indices, intersite molecular variance, and localization indices indicated that juvenile silver, bighead, and black carp from different nursery areas belong to genetically distinct populations. These results suggest that their population structure may be determined by the number of environmental settings that permit closure of their life cycle. They also imply that carp from the Yangtze River cannot be managed as a single unit and that human disturbance through exploitation and habitat modifications, in particular the construction of the Three Gorges Dam, will have differential impacts on fish abundance for different parts of the river.

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