The effect of gene flow on frost tolerance in Scots pine – Latitudinal translocation of genetic material. Hall, D., Zhao, W., Heuchel, A., Gao, J., Wennström, U., & Wang, X. Forest Ecology and Management, 544:121215, September, 2023. ![The effect of gene flow on frost tolerance in Scots pine – Latitudinal translocation of genetic material [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Extensive gene flow can be detrimental to local adaptation and similarly, forestry seed sources such as seed orchards can be heavily influenced by external pollination, especially if the orchard material has been translocated a great distance. Here we conducted a coordinated genotyping-phenotyping study to examine how external pollination events and fecundity variation in a Pinus sylvestris seed orchard influence the genetic composition and the seed-lots’ autumn frost hardiness when genetic material had been translocated 630 km south. The results were then compared to those of a in situ established seed orchard. We genotyped and phenotype \textgreater1000 seedlings from these orchards, and constructed their pedigrees and scored their autumn frost tolerance in a controlled climate chamber environment. The hardiness scores were compared with a reference of nine natural stands along a latitudinal cline. We find substantial variation in fecundity and external pollination over crop years, thus unpredictable genetic composition because the contribution of some orchard clones is high in one crop but low in another. We observed that seedlings produced by mating among orchard genotypes were less hardy than expected (corresponding to an origin of −0.6°N) but the opposite in externally pollinated seedlings (+0.3 to +0.7°N). The freeze damage levels reflect the origin of parental genotypes, but to a smaller degree than expected (13% lower than expected damage levels for externally pollinate seedlings and 21% greater damage levels for internally pollinates seedlings). These results suggest that orchard parents’ origins, mating composition and orchard local environment could all affect the seed crops’ quality and their climate adaptation. Seed orchard crops are the key to realize the gain in forestry from breeding efforts. However, genetic monitoring of seed crops is necessary to improve the performance of seed orchards further and adjust deployment areas of seed crops in a timely manner for a more dynamic forestry, considering climate change and biodiversity demands.
@article{hall_effect_2023,
title = {The effect of gene flow on frost tolerance in {Scots} pine – {Latitudinal} translocation of genetic material},
volume = {544},
issn = {0378-1127},
url = {https://www.sciencedirect.com/science/article/pii/S0378112723004498},
doi = {10.1016/j.foreco.2023.121215},
abstract = {Extensive gene flow can be detrimental to local adaptation and similarly, forestry seed sources such as seed orchards can be heavily influenced by external pollination, especially if the orchard material has been translocated a great distance. Here we conducted a coordinated genotyping-phenotyping study to examine how external pollination events and fecundity variation in a Pinus sylvestris seed orchard influence the genetic composition and the seed-lots’ autumn frost hardiness when genetic material had been translocated 630 km south. The results were then compared to those of a in situ established seed orchard. We genotyped and phenotype {\textgreater}1000 seedlings from these orchards, and constructed their pedigrees and scored their autumn frost tolerance in a controlled climate chamber environment. The hardiness scores were compared with a reference of nine natural stands along a latitudinal cline. We find substantial variation in fecundity and external pollination over crop years, thus unpredictable genetic composition because the contribution of some orchard clones is high in one crop but low in another. We observed that seedlings produced by mating among orchard genotypes were less hardy than expected (corresponding to an origin of −0.6°N) but the opposite in externally pollinated seedlings (+0.3 to +0.7°N). The freeze damage levels reflect the origin of parental genotypes, but to a smaller degree than expected (13\% lower than expected damage levels for externally pollinate seedlings and 21\% greater damage levels for internally pollinates seedlings). These results suggest that orchard parents’ origins, mating composition and orchard local environment could all affect the seed crops’ quality and their climate adaptation. Seed orchard crops are the key to realize the gain in forestry from breeding efforts. However, genetic monitoring of seed crops is necessary to improve the performance of seed orchards further and adjust deployment areas of seed crops in a timely manner for a more dynamic forestry, considering climate change and biodiversity demands.},
urldate = {2023-08-21},
journal = {Forest Ecology and Management},
author = {Hall, David and Zhao, Wei and Heuchel, Alisa and Gao, Jie and Wennström, Ulfstand and Wang, Xiao-Ru},
month = sep,
year = {2023},
keywords = {Cold hardiness, External pollination, Genetic composition, Pollen contamination, Scots pine, Seed orchard crops},
pages = {121215},
}
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Here we conducted a coordinated genotyping-phenotyping study to examine how external pollination events and fecundity variation in a Pinus sylvestris seed orchard influence the genetic composition and the seed-lots’ autumn frost hardiness when genetic material had been translocated 630 km south. The results were then compared to those of a in situ established seed orchard. We genotyped and phenotype \\textgreater1000 seedlings from these orchards, and constructed their pedigrees and scored their autumn frost tolerance in a controlled climate chamber environment. The hardiness scores were compared with a reference of nine natural stands along a latitudinal cline. We find substantial variation in fecundity and external pollination over crop years, thus unpredictable genetic composition because the contribution of some orchard clones is high in one crop but low in another. We observed that seedlings produced by mating among orchard genotypes were less hardy than expected (corresponding to an origin of −0.6°N) but the opposite in externally pollinated seedlings (+0.3 to +0.7°N). The freeze damage levels reflect the origin of parental genotypes, but to a smaller degree than expected (13% lower than expected damage levels for externally pollinate seedlings and 21% greater damage levels for internally pollinates seedlings). These results suggest that orchard parents’ origins, mating composition and orchard local environment could all affect the seed crops’ quality and their climate adaptation. Seed orchard crops are the key to realize the gain in forestry from breeding efforts. 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