Genetic parameters of growth and adaptive traits in aspen (Populus tremuloides): Implications for tree breeding in a warming world

Autor: Rong-Cai Yang, Andreas Hamann, Chen Ding, Jean S. Brouard
Přispěvatelé: Public Library of Science
Jazyk: angličtina
Rok vydání: 2020
Předmět:
0106 biological sciences
Leaves
Heredity
aspen
Ecology and Evolutionary Biology
Adaptation
Biological
Plant Science
Plant Genetics
01 natural sciences
Global Warming
Trees
genetic parameters
Adaptive traits
Multidisciplinary
Phenology
Plant Anatomy
Eukaryota
Agriculture
Plants
Populus
Genetic gain
populus tremuloides
Poplars
Medicine
Seasons
Research Article
Canada
adaptive traits
Science
growth
Quantitative Trait Loci
Growing season
Forest health
Biology
Research and Analysis Methods
010603 evolutionary biology
Autumn
Genetics
Selection
Genetic
Molecular Biology Techniques
Forest Sciences
Molecular Biology
Global warming
Plant Sciences
Organisms
Biology and Life Sciences
Genetics and Genomics
Mating design
15. Life on land
Plant Breeding
Agronomy
Seedlings
Earth Sciences
Tree breeding
010606 plant biology & botany
Cloning
Zdroj: PLoS ONE
Aspen Bibliography
PLoS ONE, Vol 15, Iss 3, p e0229225 (2020)
ISSN: 1932-6203
Popis: Aspen (Populus tremuloides Michx) is a widespread commercial forest tree of high economic importance in western Canada and has been subject to tree improvement efforts over the past two decades. Such improvement programs rely on accurate estimates of the genetic gain in growth traits and correlated response in adaptive traits that are important for forest health. Here, we estimated genetic parameters in 10 progeny trials containing >30,000 trees with pedigree structures based on a partial factorial mating design that includes 60 half-sibs, 100 full-sib families and 1,400 clonally replicated genotypes. Estimated narrow-sense and broad-sense heritabilities were low for height and diameter (~0.2), but moderate for the dates of budbreak and leaf senescence (~0.4). Furthermore, estimated genetic correlations between growth and phenology were moderate to strong with tall trees being associated with early budbreak (r = -0.3) and late leaf senescence (r = -0.7). Survival was not compromised, but was positively associated with early budbreak or late leaf senescence, indicating that utilizing the growing season was more important for survival and growth than avoiding early fall or late spring frosts. These result suggests that populations are adapted to colder climate conditions and lag behind environmental conditions to which they are optimally adapted due to substantial climate warming observed over the last several decades for the study area.
Databáze: OpenAIRE
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