Seed zones and breeding zones for sugar pine in southwestern Oregon.

Campbell, Robert K.; Sugano, Albert I.

doi:10.2737/pnw-rp-383

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Average seed transfer risks for spruce, fir, and beech in Switzerland (TransRisk) were as high as 0.18 per trait (Figure 2), which is similar to transfer risks in Douglas-fir, ponderosa pine (Pinus ponderosa), and sugar pine (Pinus lambertiana) in the Pacific Northwest (~0.2-0.3; Campbell & Sugano, 1987;Sorensen, 1994;St. Average seed transfer risks for spruce, fir, and beech in Switzerland (TransRisk) were as high as 0.18 per trait (Figure 2), which is similar to transfer risks in Douglas-fir, ponderosa pine (Pinus ponderosa), and sugar pine (Pinus lambertiana) in the Pacific Northwest (~0.2-0.3; Campbell & Sugano, 1987;Sorensen, 1994;St.…”

Section: Maladaptation From Seed Transfer and Current Climate Changementioning

confidence: 63%

Risk of genetic maladaptation due to climate change in three major European tree species

Frank

Howe

Sperisen

et al. 2017

Global Change Biology

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Tree populations usually show adaptations to their local environments as a result of natural selection. As climates change, populations can become locally maladapted and decline in fitness. Evaluating the expected degree of genetic maladaptation due to climate change will allow forest managers to assess forest vulnerability, and develop strategies to preserve forest health and productivity. We studied potential genetic maladaptation to future climates in three major European tree species, Norway spruce (Picea abies), silver fir (Abies alba), and European beech (Fagus sylvatica). A common garden experiment was conducted to evaluate the quantitative genetic variation in growth and phenology of seedlings from 77 to 92 native populations of each species from across Switzerland. We used multivariate genecological models to associate population variation with past seed source climates, and to estimate relative risk of maladaptation to current and future climates based on key phenotypic traits and three regional climate projections within the A1B scenario. Current risks from climate change were similar to average risks from current seed transfer practices. For all three climate models, future risks increased in spruce and beech until the end of the century, but remained low in fir. Largest average risks associated with climate projections for the period 2061-2090 were found for spruce seedling height (0.64), and for beech bud break and leaf senescence (0.52 and 0.46). Future risks for spruce were high across Switzerland. However, areas of high risk were also found in drought-prone regions for beech and in the southern Alps for fir. Genetic maladaptation to future climates is likely to become a problem for spruce and beech by the end of this century, but probably not for fir. Consequently, forest management strategies should be adjusted in the study area for spruce and beech to maintain productive and healthy forests in the future.

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Section: Maladaptation From Seed Transfer and Current Climate Changementioning

confidence: 63%

Risk of genetic maladaptation due to climate change in three major European tree species

Frank

Howe

Sperisen

et al. 2017

Global Change Biology

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“…Common garden studies of sugar pine in Oregon (Campbell and Sugano 1987) and across a wider range (Jenkinson 1996) suggest considerable genetic variation and a fair degree of genetic differences among locations. These differences are considerably less than for Douglas-fir but greater than for western white pine.…”

Section: Genetic Resourcesmentioning

confidence: 99%

Ex situ gene conservation for conifers in the Pacific Northwest.

Lipow¹,

Clair²,

Johnson³

2002

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Recently, a group of public and private organizations responsible for managing much of the timberland in western Oregon and Washington formed the Pacific Northwest forest tree Gene Conservation Group (GCG) to ensure that the evolutionary potential of important regional tree species is maintained. The group is first compiling data to evaluate the genetic resource status of several species of conifers both at their original location (in situ) and at some other location (ex situ). We summarize the ex situ genetic resources present in seed orchards, provenance and progeny tests, seed stores, and clone banks both in western Oregon and Washington and in other countries with germplasm that originated in western Oregon and Washington. Some species, such as ponderosa pine (Pinus ponderosa Dougl. ex Laws.), noble fir (Abies procera Rehd.), and western hemlock (Tsuga heterophylla (Raf.) Sarg.) are found to have extensive genetic resources in ex situ forms. The resources for western redcedar (Thuja plicata Donn ex D. Don), for example, are more limited. Disease greatly influenced the development of ex situ genetic resources for western white pine (P. monticola Dougl. ex D. Don), sugar pine (P. lambertiana Dougl.), and Sitka spruce (Picea sitchensis (Bong.). The summaries of genetic resources are, therefore, placed in the context of issues affecting each species. This provides land managers with the accurate information necessary for assessing the potential value of each resource for gene conservation and for prioritizing future actions.

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“…The latter method, transfer risk, estimates the proportion of genotypes at one location that does not match those at another location (Campbell and Sugano 1987;Westfall 1991). In metric traits, the number of subdivisions is based on a predetermined minimum risk within groups or zones (Campbell and Sugano 1987).…”

Section: Subdivision Into Zonesmentioning

confidence: 99%

“…In metric traits, the number of subdivisions is based on a predetermined minimum risk within groups or zones (Campbell and Sugano 1987). An application of minimum transfer risk in multi-locus allozyme genotypes to the location of gene reserves is illustrated in Millar and Westfall (1992, this issue, pp.…”

Section: Subdivision Into Zonesmentioning

confidence: 99%