TY - JOUR
T1 - Genetic variation and genotype by environment interaction in the susceptibility of Abies nordmanniana (Steven) Spach to the fungus Neonectria neomacrospora (Booth & Samuels) Mantiri & Samuels
AU - Xu, Jing
AU - Hansen, Ole Kim
AU - Thomsen, Iben Margrethe
AU - Nielsen, Ulrik Braüner
PY - 2018/3/1
Y1 - 2018/3/1
N2 - Key message: Pronounced clonal variation and moderate to high broad-sense heritability estimates of susceptibility toNeonectria neomacrosporawere found inAbies nordmannianain three sites. Significant genotype by environment (G × E) interaction was detected across sites. Context: Nordmann fir, a widely used Christmas tree species in Europe, has, since 2011, been increasingly damaged by a canker disease caused by Neonectria neomacrospora. Aims: The objective was to study the genetic variation and genotype by environment interaction in the susceptibility of Nordmann fir to N. neomacrospora. Methods: Damage caused by N. neomacrospora was evaluated using a visual scale in three Nordmann fir clonal seed orchards in Denmark, partly containing the same clones. Results: Damage due to N. neomacrospora was substantial at all three sites, and no clone was completely resistant to N. neomacrospora, but a large genetic variation in the susceptibility was detected among clones. Estimates of single-site individual broad-sense heritability for susceptibility varied between 0.38 and 0.47. The average type-B genetic correlation for damage score across sites was 0.34. Conclusion: Genetic variation was very pronounced, and significant G × E interactions were detected for susceptibility. Further investigations of narrow-sense heritability, expression of the trait in younger material, and identification of the cause of G × E for N. neomacrospora susceptibility in Nordmann fir across different sites are recommended.
AB - Key message: Pronounced clonal variation and moderate to high broad-sense heritability estimates of susceptibility toNeonectria neomacrosporawere found inAbies nordmannianain three sites. Significant genotype by environment (G × E) interaction was detected across sites. Context: Nordmann fir, a widely used Christmas tree species in Europe, has, since 2011, been increasingly damaged by a canker disease caused by Neonectria neomacrospora. Aims: The objective was to study the genetic variation and genotype by environment interaction in the susceptibility of Nordmann fir to N. neomacrospora. Methods: Damage caused by N. neomacrospora was evaluated using a visual scale in three Nordmann fir clonal seed orchards in Denmark, partly containing the same clones. Results: Damage due to N. neomacrospora was substantial at all three sites, and no clone was completely resistant to N. neomacrospora, but a large genetic variation in the susceptibility was detected among clones. Estimates of single-site individual broad-sense heritability for susceptibility varied between 0.38 and 0.47. The average type-B genetic correlation for damage score across sites was 0.34. Conclusion: Genetic variation was very pronounced, and significant G × E interactions were detected for susceptibility. Further investigations of narrow-sense heritability, expression of the trait in younger material, and identification of the cause of G × E for N. neomacrospora susceptibility in Nordmann fir across different sites are recommended.
U2 - 10.1007/s13595-018-0689-7
DO - 10.1007/s13595-018-0689-7
M3 - Journal article
SN - 1286-4560
VL - 75
JO - Annals of Forest Science
JF - Annals of Forest Science
M1 - 17
ER -