Impacts of early viability selection on management of inbreeding and genetic diversity in conservation

Molecular Ecology
Catherine E GrueberKatherine Belov

Abstract

Maintaining genetic diversity is a crucial goal of intensive management of threatened species, particularly for those populations that act as sources for translocation or re-introduction programmes. Most captive genetic management is based on pedigrees and a neutral theory of inheritance, an assumption that may be violated by selective forces operating in captivity. Here, we explore the conservation consequences of early viability selection: differential offspring survival that occurs prior to management or research observations, such as embryo deaths in utero. If early viability selection produces genotypic deviations from Mendelian predictions, it may undermine management strategies intended to minimize inbreeding and maintain genetic diversity. We use empirical examples to demonstrate that straightforward approaches, such as comparing litter sizes of inbred vs. noninbred breeding pairs, can be used to test whether early viability selection likely impacts estimates of inbreeding depression. We also show that comparing multilocus genotype data to pedigree predictions can reveal whether early viability selection drives systematic biases in genetic diversity, patterns that would not be detected using pedigree-based statistics al...Continue Reading

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Citations

Mar 15, 2018·Nature Communications·Katherine A FarquharsonCatherine E Grueber
Jun 21, 2020·Molecular Ecology Resources·Belinda R WrightCatherine E Grueber
Mar 17, 2020·Reproduction, Fertility, and Development·C E GrueberK Belov
May 26, 2021·Nature Communications·Katherine A FarquharsonCatherine E Grueber
May 30, 2021·Molecular Ecology·Catherine E GrueberKatherine Belov

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