Progeny trial estimates of genetic parameters for growth and quality traits in Scots pine.

Haapanen, Matti; Annala, Marja-Leena; Velling, Pirkko

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Silva Fennica vol. 31 no. 1 article id 5605 | 1997 | Article

Matti Haapanen , Marja-Leena Annala, Pirkko Velling

Progeny trial estimates of genetic parameters for growth and quality traits in Scots pine.

Haapanen M., Annala M.-L., Velling P. (1997). Progeny trial estimates of genetic parameters for growth and quality traits in Scots pine. Silva Fennica vol. 31 no. 1 article id 5605. https://doi.org/10.14214/sf.a8506

Abstract

Estimates of individual heritability and genetic correlation are presented for a set of 10 growth and quality traits based on data from 16 Scots pine (Pinus sylvestris L.) progeny trials in Finland. Seven of the traits (tree height, stem diameter, crown width, Pilodyn value, branch diameter, branch angle and branch number) were objectively measured, whereas three traits (stem straightness, branching score and overall score) were assessed visually. The genetic correlations were mostly moderate or low, and favourable from the tree breeder's point of view. All variables related to tree size correlated relatively strongly and positively. Tree height exhibited a more favourable genetic relationship with the crown form traits than diameter, the latter showing positive correlation with branch diameter. Except for the slight negative correlation between branch angle and branch diameter, the branching traits were not notably correlated. The pilodyn value was positively correlated with stem diameter, reflecting negative correlation between diameter growth and wood density. The highest genetic correlations occurred among the two visually evaluated quality scores and branch diameter. All of the heritabilities were less than 0.4. Overall score, Pilodyn, branch angle, branching score and tree height showed the highest heritability.

Keywords
Pinus sylvestris; Scots pine; wood quality; genetic correlation; heritability; progeny testing

Published in 1997

Available at https://doi.org/10.14214/sf.a8506 | Download PDF

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