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Preliminary estimates of genetic parameters and familial selection for non-native poplars show good potential for genetic gains on growth, cold hardiness, trunk quality and Sphaerulina musiva susceptibility

Summary

Published in Tree Genetics & Genomes 19(49). https://doi.org/10.1007/s11295-023-01625-7

Genetic parameters for growth, trunk quality, and susceptibility to frost and Sphaerulina musiva attack were estimated from 34 half-sib families of hybrid poplar from the crossing of non-native parents, Populus maximowiczii A. Henry, and Populus trichocarpa Torr. & Gray, 3 and 6 years after planting. The use of spatial analysis proved to be the best method for quantitative growth data. The proportion of the among-family variance to the total (phenotypic) variance as well as the high heritabilities of growth and susceptibility to frost and Spaherulina musiva showed a high potential for selection for these traits while the quality traits were under low genetic control. Some families showed gains for several traits, suggesting the possibility of developing a selection index to obtain superior families that show gain for not only growth but quality and adaptive traits as well. Type B correlations were high, suggesting that families responded in the same way regardless of the site. High type A correlation between growth traits at 3 and 6 years showed early selection potential, although these relationships should be confirmed with future measurements to evaluate this effect at maturity. These results can be integrated into the strategy for improving hybrid poplar parental populations and, in the longer term, will make it possible to optimize the selection of individuals with traits of interest for the operational deployment of hybrid poplar clones.

Sector(s): 

Forests

Categorie(s): 

Scientific Article

Theme(s): 

Forest Genetics, Forestry Research, Forests

Author(s)

OTIS PRUD'HOMME, Guillaume, Josianne DEBLOIS and Martin PERRON

Year of publication :

2023

Keywords :

article scientifique, scientific article, génétique forestière, forest genetics, progeny trials, hybrid breeding, genetic gain, populus maximowiczii, polupus trichocarpa, spatial analysis, test de descendance, croisement hybride, gain génétique, populus maximowiczii, polupus trichocarpa, analyse spatiales

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