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Performance of Seven Tree Breeding Strategies Under Conditions of Inbreeding Depression

Wu, Harry and Hallingbäck, Henrik and Sanchez, Leopoldo (2016). Performance of Seven Tree Breeding Strategies Under Conditions of Inbreeding Depression. G3 genes - genomes - genetics. 6:3, 529-540
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Abstract

In the domestication and breeding of tree species that suffer from inbreeding depression ( ID), the long-term performance of different breeding strategies is poorly known. Therefore, seven tree breeding strategies including single population, subline, selfing, and nucleus breeding were simulated using a multi-locus model with additive, partial, and complete dominance allele effects, and with intermediate, U-shaped, and major allele distributions. The strategies were compared for genetic gain, inbreeding accumulation, capacity to show ID, the frequencies and fixations of unfavorable alleles, and genetic variances in breeding and production populations. Measured by genetic gain of production population, the nucleus breeding and the single breeding population with mass selection strategies were equal or superior to subline and single breeding population with within-family selection strategies in all simulated scenarios, in spite of their higher inbreeding coefficients. Inbreeding and cross-breeding effectively decreased ID and could in some scenarios produce genetic gains during the first few generations. However, in all scenarios, considerable fixation of unfavorable alleles rendered the purging performance of selfing and cross-breeding strategies ineffective, and resulted in substantial inferiority in comparison to the other strategies in the long-term.

Authors/Creators:Wu, Harry and Hallingbäck, Henrik and Sanchez, Leopoldo
Title:Performance of Seven Tree Breeding Strategies Under Conditions of Inbreeding Depression
Series/Journal:G3 genes - genomes - genetics (BIB12273202)
Year of publishing :2016
Volume:6
Number:3
Page range:529-540
Number of Pages:12
Publisher:Genetics Society of America
ISSN:2160-1836
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Genetics (medical genetics to be 30107 and agricultural genetics to be 40402)
Agrovoc terms:forestry, genetics
Keywords:breeding strategy, finite locus model, multiple population, subline, nucleus, inbred-hybrid, genetic gain, forestry
URN:NBN:urn:nbn:se:slu:epsilon-e-3915
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3915
Additional ID:
Type of IDID
Web of Science (WoS)000371831000004
DOI10.1534/g3.115.025767
ID Code:14007
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:31 Jan 2017 09:37
Metadata Last Modified:04 Feb 2017 05:45

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