NDLI: Sibship within samples of brown trout (Salmo trutta) and implications for supportive breeding

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Sibship within samples of brown trout (Salmo trutta) and implications for supportive breeding

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Conservation Genetics : Volume 6, Issue 1, January 2005

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Conservation Genetics : Volume 3

Conservation Genetics : Volume 2

Conservation Genetics : Volume 1

Sibship within samples of brown trout (Salmo trutta) and implications for supportive breeding

Content Provider	Springer Nature Link
Author	Hansen, M. M. Jensen, L. F.
Copyright Year	2005
Abstract	We analysed family relationships among brown trout from two small tributary populations that have been suggested as a source of individuals for supportive breeding, using variation at eight microsatellite loci. As a control, we analysed a sample of supposedly unrelated individuals representing a large anadromous population, and we simulated unrelated individuals based on the allelic distributions in all three samples. Two different approaches were used: (1) pairwise estimates of relatedness between individuals and (2) a method for partitioning individuals into half-sib and full-sib families. The anadromous population did not show evidence of a significant number of closely related individuals. In both tributary populations, however, the distributions of pairwise relatedness estimates suggested the presence of several related individuals, and sibship reconstruction suggested fewer families consisting of more individuals than were observed for the simulated individuals. The expected increase of inbreeding coefficient in the two samples due to family structure was 0.026 and 0.030 respectively. Moreover, tests for recent bottlenecks yielded significant outcomes in both populations suggesting a history of low effective population sizes. Depending on the effective population size of captive spawners and past effective population sizes in the populations it could be beneficial to conduct sib-avoidance matings, though this cannot eliminate inbreeding but only delay it. Alternatively, individuals from different populations could be crossed. Sibship reconstruction provided the clearest evidence for family structure, but pairwise relatedness is the best measure for designing mating schemes, as it allows for mating as unrelated individuals as possible rather than just avoiding mating between sibs.
Starting Page	297
Ending Page	305
Page Count	9
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	6
Issue Number	2
e-ISSN	15729737
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2005-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bottleneck microsatellite DNA relatedness Salmo trutta sibship reconstruction supportive breeding Human Genetics Evolutionary Biology Plant Sciences Animal Anatomy / Morphology / Histology
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

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