Hybridisation processes in sympatric populations of pines Pinus sylvestris L., P. mugo Turra and P. uliginosa Neumann

Wachowiak, Witold; Prus-Głowacki, Wiesław

doi:10.1007/s00606-007-0609-z

Cited by 57 publications

(52 citation statements)

References 32 publications

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“…A lack of hybrids from crossings between P. mugo as a maternal and P. sylvestris as a paternal tree, but putative hybrid individuals from reverse crossing combinations (with P. mugo as a pollen donor), were found based on a joint analysis of cpDNA, isozymes, and phenotypic characteristics of trees (Wachowiak and Prus-Głowacki 2008) and at nuclear genes in a P. sylvestris and P. mugo population (Kormutak et al 2014). Cryptic hybrids between P. sylvestris and P. uncinata were found in the sympatric populations of the species (Jasińska et al 2010).…”

Section: Discussionmentioning

confidence: 97%

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Hybridization in contact zone between temperate European pine species

Wachowiak

Żukowska

Wójkiewicz

et al. 2016

Tree Genetics & Genomes

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Hybridization studies are important to advance our understanding of the interspecific gene flow and its evolutionary consequences in closely related species. Hybridization and admixture patterns were assessed in a contact zone and reference populations of European pine species using sequence data from 26 nuclear genes and a species-diagnostic cpDNA marker. Reference populations formed three distinct genetic clusters comprising Pinus sylvestris, Pinus mugo/Pinus uliginosa, and Pinus uncinata. Evidence of population structure was found only in P. uliginosa. Based on phenotypic characteristics and molecular data, we identified five groups of individuals in the contact zone in Poland, comprising forms of the parental species and intermediates that were most probably the result of interspecific crosses. A combination of nuclear gene sequence data and a diagnostic organelle marker were used to show that hybridization is frequent in the contact zone and results in hybrid trees with distinct phenotypic identity. The influence of selection in maintaining hybrid phenotypes in environments unsuited to parental species was inferred from nucleotide polymorphism data. A lack of admixture in reference populations suggests that hybridization has not occurred during post-glacial migration and so the contact zone represents a distinct, active example of ongoing evolution. Pine populations in this zone will be a valuable system for studying the genetic basis of hybrid advantage in environmental conditions untypical of pure parental species.

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Section: Discussionmentioning

confidence: 97%

“…(Jasińska et al 2010;Wachowiak and Prus-Głowacki 2008). These taxa differ from each other in phenotype, geographical distribution, and ecology, in particular for traits related to dehydrative stress and temperature (Critchfield and Little 1966).…”

Section: Communicated By F Gugerlimentioning

confidence: 99%

Hybridization in contact zone between temperate European pine species

Wachowiak

Żukowska

Wójkiewicz

et al. 2016

Tree Genetics & Genomes

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“…Hybridization occurs in situations of sympatry and parapatry, often following range shifts and secondary contact between closely related and formerly allopatric species (Song et al, 2002(Song et al, , 2003Wachowiak and Prus-G"owacki, 2008). Hybridization can result in introgression of alleles across species boundaries and sometimes the origin of a new introgressant lineage (Currat et al, 2008;Kim et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, a small but increasing number of cases has been documented recently across a range of plant, animal and fungal taxa (Gross and Rieseberg, 2005;Mallet, 2007;Abbott et al, 2010). It is well known that many closely related pine species hybridize, producing fertile and vigorous hybrids that combine morphological traits and/or genetic components of both parental species (Mirov, 1967;Wachowiak and Prus-G"owacki, 2008). Although several Asian pine species are thought to be of hybrid origin (Mirov, 1967), only Pinus densata has been rigorously analyzed and shown to be the homoploid hybrid of Pinus tabulaeformis and Pinus yunnanensis (Wang et al, 1990;Song et al, 2002Song et al, , 2003Song et al, , 2011Ma et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…This independent inheritance of two cytoplasmic genomes provides the opportunity for tracing paternal and maternal genetic changes within a single species because of different rates of gene flow and for discriminating female and male parents of hybrids (Ennos, 1994;Liston et al, 2007;Wachowiak and Prus-G"owacki, 2008). In addition, the analysis of multiple nuclear loci can be used to examine interspecific divergence and clarify parental origins of putative hybrid species (for example, Ma et al, 2006;Li et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Genetic divergence, range expansion and possible homoploid hybrid speciation among pine species in Northeast China

Zhou

et al. 2011

Heredity

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Although homoploid hybrid speciation in plants is probably more common than previously realized, there are few welldocumented cases of homoploid hybrid origin in conifers. We examined genetic divergence between two currently widespread pines in Northeast China, Pinus sylvestris var. mongolica and Pinus densiflora, and also whether two narrowly distributed pines in the same region, Pinus funebris and Pinus takahasii, might have originated from the two widespread species by homoploid hybrid speciation. Our results, based on population genetic analysis of chloroplast (cp), mitochondrial (mt) DNA, and nuclear gene sequence variation, showed that the two widespread species were divergent for both cp-and mtDNA variation, and also for haplotype variation at two of eight nuclear gene loci surveyed. Our analysis further indicated that P. sylvestris var. mongolica and P. densiflora remained allopatric during the most severe Quaternary glacial period that occurred in Northeast China, but subsequently exhibited rapid range expansions. P. funebris and P. takahasii, were found to contain a mixture of chlorotypes and nuclear haplotypes that distinguish P. sylvestris var. mongolica and P. densiflora, in support of the hypothesis that they possibly originated via homoploid hybrid speciation following secondary contact and hybridization between P. sylvestris var. mongolica and P. densiflora.

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Essential‐Oil Variability in Natural Populations of Pinus mugoTurra from the Julian Alps

Bojović

Jurc

Ristić

et al. 2016

Chemistry & Biodiversity

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The composition and variability of the terpenes and their derivatives isolated from the needles of a representative pool of 114 adult trees originating from four natural populations of dwarf mountain pine (Pinus mugo Turra) from the Julian Alps were investigated by GC-FID and GC/MS analyses. In total, 54 of the 57 detected essential-oil components were identified. Among the different compound classes present in the essential oils, the chief constituents belonged to the monoterpenes, comprising an average content of 79.67% of the total oil composition (74.80% of monoterpene hydrocarbons and 4.87% of oxygenated monoterpenes). Sesquiterpenes were present in smaller amounts (average content of 19.02%), out of which 16.39% were sesquiterpene hydrocarbons and 2.62% oxygenated sesquiterpenes. The most abundant components in the needle essential oils were the monoterpenes δ-car-3-ene, β-phellandrene, α-pinene, β-myrcene, and β-pinene and the sesquiterpene β-caryophyllene. From the total data set of 57 detected compounds, 40 were selected for principal-component analysis (PCA), discriminant analysis (DA), and cluster analysis (CA). The overlap tendency of the four populations suggested by PCA, was as well observed by DA. CA also demonstrated similarity among the populations, which was the highest between Populations I and II.

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Hybridisation processes in sympatric populations of pines Pinus sylvestris L., P. mugo Turra and P. uliginosa Neumann

Cited by 57 publications

References 32 publications

Hybridization in contact zone between temperate European pine species

Hybridization in contact zone between temperate European pine species

Genetic divergence, range expansion and possible homoploid hybrid speciation among pine species in Northeast China

Essential‐Oil Variability in Natural Populations of Pinus mugoTurra from the Julian Alps

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