Geographic pattern of genetic diversity in<i>Pinus resinosa</i>: contact zone between descendants of glacial refugia

Walter, Rosemarie; Epperson, Bryan K.

doi:10.3732/ajb.92.1.92

Cited by 45 publications

(47 citation statements)

References 38 publications

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“…A strong loss of genetic variation within populations can be the result of founder effects at the migrating front, and therefore, highest genetic variation within populations should be present in refugial areas and decrease to the more distant and recently recolonized parts (Hewitt 1999). In contrast, high genetic variation within populations in recently deglaciated regions may be an indication for contact zones of different genetic lineages originated from different refugia (Walter and Epperson 2005). Long-term isolated populations or populations founded by long-distance dispersal should be characterized by stronger genetic differentiation than populations expanding their range continuously (Tyler 2002a;Hewitt 1996).…”

Section: Introductionmentioning

confidence: 90%

Survival and postglacial immigration of the steppe plant Scorzonera purpurea to Central Europe

et al. 2016

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Temperate grasslands belong to the most diverse plant communities of Central Europe. However, there is still a lack of information about glacial refugia and migration processes of herbaceous grassland and especially steppe species in Central Europe. Therefore, we analyzed the survival and postglacial immigration of Scorzonera purpurea to Central Europe. We investigated 348 individuals from 37 populations in Europe using amplified fragment length polymorphisms and chloroplast microsatellite analyses. Our study revealed two major genetic groups along the European distribution range consisting of western populations on the one hand and closely related central and (south)eastern populations on the other hand. Genetic variation was highest within populations from the Pannonian basin and decreased toward Western and Central Europe. Our study gives evidence for the long-term survival of S. purpurea in Western Europe and the postglacial immigration from the southeastern parts of Europe, maybe by domestic livestock of migrating farmers during the Neolithic age to Central Europe. Immigration presumably followed two routes from Pannonia along the river Danube into Southern Germany and from Pannonia along the northern border of the Carpathians to Northern Germany. In Central Germany, the different genetic lineages may have met and formed contact zones. Our data show that steppe species may both have survived in and immigrated to Western and Central Europe.Further and more detailed studies on other steppe species are, therefore, needed to investigate the origin of these rare and often endangered species more generally.

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Section: Introductionmentioning

confidence: 90%

Survival and postglacial immigration of the steppe plant Scorzonera purpurea to Central Europe

et al. 2016

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“…Three substitutions (178, A/C; 248, C/A; 364, C/A) and poly-T repeats, which varied in length between 15 and 19 bp (positions 380-383), were found. Since mononucleotide repeats (such as poly-A and poly-T) have been shown to provide valuable information for intraspecies studies (Rendell and Ennos 2003;Walter and Epperson 2005;Naciri and Gaudeul 2007;Artyukova et al 2009), all polymorphism sites were analyzed and three haplotypes were identified. The length of the aligned sequences of the psbA-trnH spacer was 526 bp.…”

Section: Genetic Composition and Diversitymentioning

confidence: 99%

Patterns of chloroplast DNA variation in Cycas debaoensis (Cycadaceae): conservation implications

et al. 2011

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Climate changes during glacial periods have had significant effects on the current distribution of plant species. Palaeontologial data suggest that modern cycads originated in southwest China. Cycas debaoensis (Cycadaceae) is an endangered species restricted to a small area of southwest China. This species has been classified into two types: sand and karst, according to the soil matrix they grow on. To determine the locations of its glacial refugia and its genetic structure, we examined chloroplast sequence variation of the atpB-rbcL and psbA-trnH intergenic spacers. Four chloroplast DNA haplotypes were obtained from 120 individuals collected from 11 populations covering the entire extant distribution range of the species. Significant population subdivision was detected (G ST = 0.684 and F ST = 0.74160), suggesting low levels of gene flow between regions and populations. There was marked haplotype differentiation between populations in the sand and karst regions, with only one haplotype being present in both. The molecular phylogenetic data, together with the geographic distribution of the haplotypes, suggest that C. debaoensis experienced range contraction during glacial periods, and that the current populations are still confined to the areas of the original refugia. These results implied that isolated refugia might have maintained in both sand and karst regions during the last glacial maximum and even earlier glaciations. The low within-population diversity of C. debaoensis suggested that there were strong bottleneck events or founder effects within each separate region during the Quaternary climatic oscillations. These findings are important for the conservation of this endangered species.

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“…Its uniform growth rate and good form enhance thinning and pruning operations for value-added products (Fowler and Heimburger 1969) For personal use only. Walter and Epperson (2005) found a remarkably narrow and sharply bounded band-shaped area of high genetic diversity centered at northeastern New England, which showed genetic diversity within the geographic distribution of red pine. Even though red pine may not be genetically diverse in isozyme and other molecular markers, it may show genetic variation in quantitative traits such as diameter and height.…”

Section: Introductionmentioning

confidence: 99%

A red pine provenance test in northwestern Ontario: 48-year results

Rahi¹,

Bowling²,

Simpson³

2010

The Forestry Chronicle

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a limited seed supply, sensitivity to hard water and excessively large branches (especially at wider spacing) are drawbacks.Despite growing on a wide range of sites, red pine is remarkably uniform in taxonomic and morphological characteristics, a rare feature amongst pines (Holst 1975, Boys et al. 2005. Studies on red pine populations from Quebec (Simon et al. 1986), Ontario, New Brunswick and Nova Scotia (Fowler and Morris 1977), and isolated populations in Newfoundland (Mosseler et al. 1991(Mosseler et al. , 1992 ABSTRACTSurvival, total height and diameter at breast height (DBH) were measured in the fall of 2005 in a 48-year-old red pine (Pinus resinosa Ait.) provenance trial growing in northwestern Ontario. There was significant variation in both height and diameter among the 23 provenances. Generally, westerly provenances performed well while those from the Maritime Provinces exhibited relatively poor growth. Considering that the plantation is at the northern biological range of red pine, survival was high, averaging 96% after 48 years. Provenances with the best growth rates exceeded a volume of 420 m 3 ha -1 . Some provenances from Minnesota and Wisconsin as well as Fort Frances, Ontario exhibited superior growth and should be considered as seed sources for future planting programs in northwestern Ontario.Key words: red pine, provenance test, survival, diameter, height, volume, Northwestern Ontario RÉSUMÉ Le taux de survie, la hauteur totale et le diamètre à hauteur de poitrine (dhp) ont été mesurées à l'automne 2005 dans une plantation de pin rouge (Pinus resinosa Ait.) âgée de 48 ans destinée à faire l' essai de différentes provenances de semis et située dans le nord-ouest de l'Ontario. On a relevé une variation significative tant au niveau de la hauteur que du diamètre parmi les 23 provenances. De façon générale, les provenances occidentales ont bien performé tandis que celles issues des provinces de l' Atlantique ont démontré une croissance relativement décevante. En prenant en considération que la plantation est située à la limite nordique de l'aire de distribution biologique du pin rouge, le taux de survie s' est révélé être élevé, atteignant une moyenne de 96 % après 48 ans. Les provenances ayant les meilleurs taux de croissance ont atteint un volume supérieur à 420 m 3 ha -1 . Certaines provenances du Minnesota et du Wisconsin ainsi que de la région de Fort Frances en Ontario ont démontré une croissance plus importante et devraient être retenues comme sources de semences pour les prochains programmes de plantation à être réalisés dans le nord-ouest de l'Ontario.

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Geographic pattern of genetic diversity inPinus resinosa: contact zone between descendants of glacial refugia

Cited by 45 publications

References 38 publications

Survival and postglacial immigration of the steppe plant Scorzonera purpurea to Central Europe

Survival and postglacial immigration of the steppe plant Scorzonera purpurea to Central Europe

Patterns of chloroplast DNA variation in Cycas debaoensis (Cycadaceae): conservation implications

A red pine provenance test in northwestern Ontario: 48-year results

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