Landscape features influence gene flow as measured by cost-distance and genetic analyses: a case study for giant pandas in the Daxiangling and Xiaoxiangling Mountains.

BMC Genetics
Lifeng ZhuFuwen Wei

Abstract

Gene flow maintains genetic diversity within a species and is influenced by individual behavior and the geographical features of the species' habitat. Here, we have characterized the geographical distribution of genetic patterns in giant pandas (Ailuropoda melanoleuca) living in four isolated patches of the Xiaoxiangling and Daxiangling Mountains. Three geographic distance definitions were used with the "isolation by distance theory": Euclidean distance (EUD), least-cost path distance (LCD) defined by food resources, and LCD defined by habitat suitability. A total of 136 genotypes were obtained from 192 fecal samples and one blood sample, corresponding to 53 unique genotypes. Geographical maps plotted at high resolution using smaller neighborhood radius definitions produced large cost distances, because smaller radii include a finer level of detail in considering each pixel. Mantel tests showed that most correlation indices, particularly bamboo resources defined for different sizes of raster cell, were slightly larger than the correlations calculated for the Euclidean distance, with the exception of Patch C. We found that natural barriers might have decreased gene flow between the Xiaoxiangling and Daxiangling regions. Landscap...Continue Reading

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Nov 10, 2006·Biochemical Genetics·Bao-Wei ZhangFu-Wen Wei
Apr 23, 2010·Conservation Biology : the Journal of the Society for Conservation Biology·Lifeng ZhuFuwen Wei
Jan 1, 2009·Molecular Ecology Resources·Raphaël LebloisFrançois Rousset

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Citations

Nov 1, 2012·Molecular Ecology·S Pérez-EsponaN R Franks
Feb 6, 2020·Ecology and Evolution·Jingsi TangYing Li

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Methods Mentioned

BETA
PCR
electrophoresis
genotyping

Software Mentioned

EASTNESS
Arcview3
SPAGeDI
Geneland
PATHMATRIX
ArcGIS
GIMLET
Patch
Microchecker
GIS

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