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Genetic variation pattern among Abies cilicica (Pinaceae) populations: Adaptive seed and seedling traits
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Date
2022-9-12
Author
Gülsoy, Ali Murat
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The pattern of genetic variation in adaptive seed and seedling traits of Abies cilicica was investigated using 160 families from 8 populations representing the species' natural range for two years in the Olcay Forest Nursery in Konya. The study indicated that both populations and families within populations varied significantly in seed and seedling traits. The pattern of genetic variation among populations suggests that there may be a clinal variation concerning altitude and latitude regarding these traits. However, further investigations need to be done beyond the two growing seasons. The variation due to populations varied from 0.3% in Diam20 to 41.5 % in Ht20, while the variance component of families within populations was from 12.4 % in BS20 to 85% in survival in the 2020 growing season. Estimated family heritabilities were generally high for most traits, ranging from 0.41 in BS20 to 0.91 in BB20 and 0.98 in survival in 2020. Seed weight significantly and positively correlated with growth traits measured in 2019 and 2020, indicating the presence of maternal effects on the early performances of seedlings' growth. Genetic and phenotypic correlations between adaptive seedling traits in 2020 were in the same magnitude and direction. There were strong and negative genetic correlations between bud set date and growth traits in the 2020 growing season. Interestingly, there was a strong and negative genetic correlation between BB20 and BS20 in the same growing season, meaning that those families with late bud bursts had early bud sets, having a short growing season. The amount and pattern of genetic diversity in seed and seedling traits and genetic correlations among them suggest that Cilician fir will have a great potential to adapt to changing climate and to provide opportunities for foresters to use effectively assisted migration practices.
Subject Keywords
Abies cilicica
,
Nursery experiment
,
Genetic variation
,
Seed and seedling traits
,
Assisted migration
URI
https://hdl.handle.net/11511/99599
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Graduate School of Natural and Applied Sciences, Thesis
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A. M. Gülsoy, “Genetic variation pattern among Abies cilicica (Pinaceae) populations: Adaptive seed and seedling traits,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.
