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Spatial genetic characterizations of...

Nguyen-Phuc, Hoa.

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Spatial genetic characterizations of neutral and adaptive variation of Red Junglefowl (Gallus gallus) in South Central Vietnam.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Spatial genetic characterizations of neutral and adaptive variation of Red Junglefowl (Gallus gallus) in South Central Vietnam./
作者:	Nguyen-Phuc, Hoa.
面頁冊數:	161 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-12(E), Section: B.
Contained By:	Dissertation Abstracts International76-12B(E).
標題:	Animal sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3719223
ISBN:	9781321995145

Spatial genetic characterizations of neutral and adaptive variation of Red Junglefowl (Gallus gallus) in South Central Vietnam.
Nguyen-Phuc, Hoa.

Spatial genetic characterizations of neutral and adaptive variation of Red Junglefowl (Gallus gallus) in South Central Vietnam. - 161 p.

Source: Dissertation Abstracts International, Volume: 76-12(E), Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2015.

Genetic diversity is inherently a spatial process of stochastic and directional evolutionary forces, as well as the interactions between such forces with the underlying environment. These factors may operate simultaneously and are challenging to understand, particularly in highly-mobile species or species who are dependent to human activities. In this dissertation, I employed molecular technologies and spatial analyses to examine genetic diversity in Red Junglefowl (Gallus gallus), an important agricultural species. My aim was to understand how spatial processes affect genetic diversity and how landscape patterns may influence population structure at microgeographic scales. I screened 212 wild Red Junglefowl sampled across diverse habitats in South Central Vietnam with two genomic tools. First, analyses of 289 amplified fragment length polymorphisms (AFLPs) identified high degree of interspecific-population differentiation (overall FST = 0.1028) with no evidence of contemporary long-distance genetic exchanges especially across the major barrier Annamite Mountain Range. Fine-scale spatial landscape models detected substantial intraspecific genetic subdivision to distances as low as 5 km. The magnitude of spatial neutral variation of the ground-dwelling pheasants, however, showed no causative relationship between landscape features of landcover and topography. Second, I interrogated an 84-SNP panel sites spanning the entire 242 Kb major histocompatibility complex (MHC) B-locus and identified 310 unique MHC haplotypes (77.89% of the total 398 chromosomes). Comparison to 17 lines of domestic chickens indicated that wild Red Junglefowl have extraordinarily high haplotypic diversity. The majority of variation in MHC haplotypes (94.51%) occurred within individuals while genetic differentiation between populations was negligible (overall FST = 0.0083). Likely augmented by recombination, the B-locus also exhibited a few areas of strong linkage suggesting perhaps concerted evolution against a common pathogen. Overall, the results suggest the spatial pattern of MHC is adaptive and under the influence of balancing selection while neutral AFLPs reflect demographic processes and movements of the birds. I conclude that wild populations of Red Junglefowl in Vietnam represent one of the richest resources of natural genomic variation. Both neutral and adaptive genetic diversity should be equally considered in a spatial research framework for future management of animal genetic diversity, including application to agricultural stock improvement.

ISBN: 9781321995145Subjects--Topical Terms:

3174829
Animal sciences.

Spatial genetic characterizations of neutral and adaptive variation of Red Junglefowl (Gallus gallus) in South Central Vietnam.
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