Genetic differentiation in spite of high gene flow in the dominant rainforest tree of southeastern Australia, Nothofagus cunninghamii

Ailanthus excelsa Roxb. is an economically important and multipurpose dioecious tree species of India, mainly used for fodder and timber. Gender-based genetic diversity of five populations of two sites (Jodhpur, Rajasthan and Deesa, Gujarat) of A. excelsa was assessed. A total of 42 RAPD, 20 ISSR and 23 SCoT primers were screened for DNA amplification of 232 individuals. Out of which only 25 primers (13 RAPD, 6 ISSR and 6 SCoT) were found polymorphic. The SCoT markers were showed the highest value for PIC, MI, Rp value, Nei’s gene diversity and Shannon’s index, as compared with the other two markers. Female individuals in all five populations had slightly higher genetic diversity as compared with male individuals. A high level of genetic diversity (55%) was detected within the populations of male and female individuals. High gene flow (6.70) and low genetic differentiation (0.069) values were found between Jodhpur and Deesa sites. Principal component analysis for all populations were accounted for 48.7% of the genetic variation. The Mantel test showed significant correlation (R = 0.178, P = .01) between genetic and geographic distances. The present study showed that SCoT markers were best for genetic diversity assessment in A. excelsa over RAPD and ISSR markers. High gene flow and low genetic differentiation in A. excelsa indicates its poor population fragmentation despite long geographic distances.

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Separating the wheat from the chaff: patterns of genetic differentiation in high gene flow species

Journal of Heredity ◽

10.1093/jhered/89.5.438 ◽

1998 ◽

Vol 89 (5) ◽

pp. 438-450 ◽

Cited By ~ 812

Author(s):

R. S. Waples

Keyword(s):

Gene Flow ◽

Genetic Differentiation ◽

High Gene Flow ◽

High Gene

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Faculty Opinions recommendation of Locally adapted traits maintained in the face of high gene flow.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.725223126.793501360 ◽

2014 ◽

Author(s):

Ian Wang

Keyword(s):

Gene Flow ◽

High Gene Flow ◽

The Face ◽

High Gene

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Dispersal and Differentiation of Deep-Sea Mussels of the GenusBathymodiolus(Mytilidae, Bathymodiolinae)

Journal of Marine Biology ◽

10.1155/2009/625672 ◽

2009 ◽

Vol 2009 ◽

pp. 1-15 ◽

Cited By ~ 31

Author(s):

Akiko Kyuno ◽

Mifue Shintaku ◽

Yuko Fujita ◽

Hiroto Matsumoto ◽

Motoo Utsumi ◽

...

Keyword(s):

Gene Flow ◽

Genetic Differentiation ◽

Shallow Water ◽

Deep Sea ◽

Dispersal Ability ◽

Evolutionary Transition ◽

Significant Genetic Differentiation ◽

Evolutionary Processes ◽

High Dispersal ◽

High Gene

We sequenced the mitochondrial ND4 gene to elucidate the evolutionary processes ofBathymodiolusmussels and mytilid relatives. Mussels of the subfamily Bathymodiolinae from vents and seeps belonged to 3 groups and mytilid relatives from sunken wood and whale carcasses assumed the outgroup positions to bathymodioline mussels. Shallow water mytilid mussels were positioned more distantly relative to the vent/seep mussels, indicating an evolutionary transition from shallow to deep sea via sunken wood and whale carcasses.Bathymodiolus platifronsis distributed in the seeps and vents, which are approximately 1500 km away. There was no significant genetic differentiation between the populations. There existed high gene flow betweenB. septemdierumandB. breviorand low but not negligible gene flow betweenB. marisindicusandB. septemdierumorB. brevior, although their habitats are 5000–10 000 km away. These indicate a high adaptability to the abyssal environments and a high dispersal ability ofBathymodiolusmussels.

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