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Title: Additive and Non-Additive Genetic Variances for Tree Growth in Several Hybrid Poplar Populations and Implications Regarding Breeding Strategy

Abstract

Populus species (P. deltoides, P. maximowiczii, P. nigra) and their inter-specific hybrids were tested for growth rate over a five year period at four test locations in Minnesota, USA, to estimate genetic variance components. The breeding scheme incorporated recurrent selection of full-sib families of pure species parents, production of F 1inter-specific hybrids from selected families, and selection of clones within the F 1s. Improvement of yield through time using this scheme is predicated on the assumption that additive effects comprise a significant portion of the total genetic variance. The estimates of additive and non-additive variances reported are not traditional point estimates, because a fully balanced mating design was impossible due to parental incompatibilities which result in incomplete breeding matrices. Instead, bounded estimates, not previously used in tree genetics research, are derived from linear combinations of formulae of genetic expectations observed among-family, among-clone, and environmental variances. Our results suggest that combined family and mass selection would lead to increases in growth rate of 27 % and 47 % per generation in P. deltoides and P. nigra, respectively. Broad sense-based clonal selection within the F 1could yield selection responses in excess of 90 % of the mean of such populations. Among-family variancemore » comprised about 1/3 of total genetic variance while within-family variance was always about 2/3 of total genetic variance, regardless of pedigree. With this beind said, the results indicate that recurrent intraspecific selective breeding followed by interspecific hybridization and non-recurrent selection based on broad sense genetic variation would constitute an effective yield improvement strategy.« less

Authors:
 [1];  [1];  [1]
  1. Univ. of Minnesota, Duluth, MN (United States)
Publication Date:
Research Org.:
South Dakota State Univ., Brookings, SD (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1498989
Grant/Contract Number:  
FC36-05GO85041
Resource Type:
Accepted Manuscript
Journal Name:
Silvae Genetica
Additional Journal Information:
Journal Volume: 66; Journal Issue: 1; Journal ID: ISSN 2509-8934
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 54 ENVIRONMENTAL SCIENCES; Populus; breeding strategy; additive and non-additive genetic variance; clonal selection

Citation Formats

Berguson, W. E., McMahon, B. G., and Riemenschneider, D. E. Additive and Non-Additive Genetic Variances for Tree Growth in Several Hybrid Poplar Populations and Implications Regarding Breeding Strategy. United States: N. p., 2017. Web. doi:10.1515/sg-2017-0005.
Berguson, W. E., McMahon, B. G., & Riemenschneider, D. E. Additive and Non-Additive Genetic Variances for Tree Growth in Several Hybrid Poplar Populations and Implications Regarding Breeding Strategy. United States. doi:10.1515/sg-2017-0005.
Berguson, W. E., McMahon, B. G., and Riemenschneider, D. E. Thu . "Additive and Non-Additive Genetic Variances for Tree Growth in Several Hybrid Poplar Populations and Implications Regarding Breeding Strategy". United States. doi:10.1515/sg-2017-0005. https://www.osti.gov/servlets/purl/1498989.
@article{osti_1498989,
title = {Additive and Non-Additive Genetic Variances for Tree Growth in Several Hybrid Poplar Populations and Implications Regarding Breeding Strategy},
author = {Berguson, W. E. and McMahon, B. G. and Riemenschneider, D. E.},
abstractNote = {Populus species (P. deltoides, P. maximowiczii, P. nigra) and their inter-specific hybrids were tested for growth rate over a five year period at four test locations in Minnesota, USA, to estimate genetic variance components. The breeding scheme incorporated recurrent selection of full-sib families of pure species parents, production of F1inter-specific hybrids from selected families, and selection of clones within the F1s. Improvement of yield through time using this scheme is predicated on the assumption that additive effects comprise a significant portion of the total genetic variance. The estimates of additive and non-additive variances reported are not traditional point estimates, because a fully balanced mating design was impossible due to parental incompatibilities which result in incomplete breeding matrices. Instead, bounded estimates, not previously used in tree genetics research, are derived from linear combinations of formulae of genetic expectations observed among-family, among-clone, and environmental variances. Our results suggest that combined family and mass selection would lead to increases in growth rate of 27 % and 47 % per generation in P. deltoides and P. nigra, respectively. Broad sense-based clonal selection within the F1could yield selection responses in excess of 90 % of the mean of such populations. Among-family variance comprised about 1/3 of total genetic variance while within-family variance was always about 2/3 of total genetic variance, regardless of pedigree. With this beind said, the results indicate that recurrent intraspecific selective breeding followed by interspecific hybridization and non-recurrent selection based on broad sense genetic variation would constitute an effective yield improvement strategy.},
doi = {10.1515/sg-2017-0005},
journal = {Silvae Genetica},
number = 1,
volume = 66,
place = {United States},
year = {2017},
month = {12}
}

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