Performance of Green Ash Seed Sources at Four Locations in the Great Plains Region

Geyer, Wayne A.; Lynch, Keith D.; Row, John; Schaeffer, Peter V.; Bagley, W. T.

doi:10.1093/njaf/22.1.54

Cited by 2 publications

(2 citation statements)

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“…Due to the likelihood and speed with which an ash tree dies after infestation, there is now great concern about the loss of genetic variability (Widrlechner, 2010), especially for the potential loss of any locally adaptive genotypes or unique rare alleles. In contrast to extensive studies on the genetic structure of F. excelsior across Europe (Heuertz et al, 2001(Heuertz et al, , 2004Rudinger et al, 2008) and Fraxinus mandshurica across Northeast China (Hu et al, 2008(Hu et al, , 2010, there is limited genetic information on native North American species of Fraxinus with most of the information being based on morphological and ecological attributes between species (Taylor, 1971;Karnosky and Steiner, 1981;Carter, 1996;Geyer et al, 2005). Our research is one of the first attempts made to study the genetic structure of F. pennsylvanica by examining molecular markers.…”

Section: Discussionmentioning

confidence: 91%

“…In contrast to extensive studies on the genetic structure of F. excelsior across Europe (Heuertz et al , 2001, 2004; Rudinger et al , 2008) and Fraxinus mandshurica across Northeast China (Hu et al , 2008, 2010), there is limited genetic information on native North American species of Fraxinus with most of the information being based on morphological and ecological attributes between species (Taylor, 1971; Karnosky and Steiner, 1981; Carter, 1996; Geyer et al , 2005). Our research is one of the first attempts made to study the genetic structure of F. pennsylvanica by examining molecular markers.…”

Section: Discussionmentioning

confidence: 99%

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Genetic structure of green ash (Fraxinus pennsylvanica): implications for the establishment ofex situconservation protocols in light of the invasion of the emerald ash borer

et al. 2014

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The USA is experiencing a prolific invasion of the wood-boring emerald ash borer, Agrilus planipennis. Native to Asia, this beetle completes its life cycle on ash trees and results in nearly complete mortality of all infested trees. In the present study, we examined the levels of genetic diversity and differentiation among eight populations of Fraxinus pennsylvanica (green ash) using five polymorphic microsatellite loci. Genetic information was used to design guidelines for the establishment of a seed collection sampling strategy to conserve the genetic diversity of ash trees. We found high levels of genetic diversity, as indicated by the allelic richness, both across the populations (16.4^5.18 alleles per locus) and within them (8.03^1.21 alleles per locus). The expected and observed heterozygosity was also high (0.805^0.38 and 0.908^0.04, respectively), and there was moderate genetic differentiation among the populations (F ST ¼ 0.083) with members of these eight populations grouped into three distinct clusters. We examined the relationship between the number of individuals sampled and the number of alleles captured in a random sample taken from a population of 10,000 individuals. Only sample sizes of 100 individuals captured most of the alleles (average ¼ 78.74 alleles), but only seven of 50 samples effectively captured all the 82 alleles. Smaller samples did not capture all alleles. A probabilistic model was used to determine an optimal sampling strategy, and it was concluded that a collection of 200 seeds from each of five mother trees would have the highest likelihood of capturing all alleles in a population.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Genetic structure of green ash (Fraxinus pennsylvanica): implications for the establishment ofex situconservation protocols in light of the invasion of the emerald ash borer

et al. 2014

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Assessing the influence of climate on the growth of green ash trees from five Plant Hardiness Zones growing in a range-wide provenance test near the species’ northern range limit

Schaberg,

Murakami,

Hansen

et al. 2024

Can. J. For. Res.

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Green ash is threatened with extirpation from emerald ash borer (EAB) attack. Because green ash has an extensive range, its restoration could require both breeding for EAB resistance and possible adaptation to a variety of environmental gradients. We assessed the growth and climate sensitivity of green ash from five Plant Hardiness Zones (PHZs) growing in a range-wide provenance test in Vermont. Although there tended to be greater growth among trees from the warmest PHZ (7), differences were rarely statistically distinguishable. For trees from all PHZs, growth was positively correlated with precipitation in the current year and negatively correlated with precipitation the year before (a possible legacy effect). Growth was negatively associated with temperature the year of ring formation but positively associated with temperatures the year before. Growth was often positively correlated with winter snow but was negatively associated with spring or fall snow for the warmest PHZs. Climate correlations for PHZ 3 were unusual in that: 1) only positive correlations were detected, 2) no legacy effects were noted, and 3) despite being from the coldest region, no correlations with snow were found. Growth increased over time for the warmest PHZs during a period of simultaneous increases in temperature and precipitation.

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Performance of Green Ash Seed Sources at Four Locations in the Great Plains Region

Cited by 2 publications

References 4 publications

Genetic structure of green ash (Fraxinus pennsylvanica): implications for the establishment ofex situconservation protocols in light of the invasion of the emerald ash borer

Genetic structure of green ash (Fraxinus pennsylvanica): implications for the establishment ofex situconservation protocols in light of the invasion of the emerald ash borer

Assessing the influence of climate on the growth of green ash trees from five Plant Hardiness Zones growing in a range-wide provenance test near the species’ northern range limit

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