Natural hybridization between cultivated poplars and their wild relatives: evidence and consequences for native poplar populations

Broeck, An Vanden; Villar, Marc; Bockstaele, Erik Van; VanSlycken, Jos

doi:10.1051/forest:2005072

Cited by 83 publications

(58 citation statements)

References 69 publications

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“…from plantations should be possible to manage with appropriate monitoring, but this should be evaluated further before Eucalyptus spp. are adopted for widespread planting.‖ Unlike Eucalyptus, invasiveness of Populus has not been widely discussed and most attention has been focused on indirect implications of potential hybridization between exotic and native Populus species [53][54][55][56][57][58]. The dilution or alteration of native populations, potential pest and pathogen outbreaks, and impacts on sensitive ecosystems have been cited as potential risks.…”

Section: Invasivenessmentioning

confidence: 99%

Scientific Basis for Sustainable Management of Eucalyptus and Populus as Short-Rotation Woody Crops in the U.S.

Vance

Loehle

Wigley

et al. 2014

Forests

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Short rotation woody crops (SRWC), fast growing tree species that are harvested on short, repeated intervals, can augment traditional fiber sources. These crops have economic and environmental benefits stemming from their capability of supplying fiber on a reduced land base in close proximity to users and when sensitive sites cannot be accessed. Eucalyptus and Populus appear to be genera with the greatest potential to provide supplemental fiber in the U.S. Optimal productivity can be achieved through practices that overcome site limitations and by choosing the most appropriate sites, species, and clones. Some Eucalyptus species are potentially invasive, yet field studies across multiple continents suggest they are slower to disperse than predicted by risk assessments. Some studies have found lower plant and animal diversity in SRWC systems compared to mature, native forests, but greater than some alterative land uses and strongly influenced by stand management, land use history, and landscape context. Eucalyptus established in place of grasslands, arable lands, and, in some cases, native forests can reduce streamflow and lower water tables due to higher interception and transpiration rates but results vary widely, are scale dependent, and are most evident in drier regions. OPEN ACCESS

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Section: Invasivenessmentioning

confidence: 99%

Scientific Basis for Sustainable Management of Eucalyptus and Populus as Short-Rotation Woody Crops in the U.S.

Vance

Loehle

Wigley

et al. 2014

Forests

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“…The general incompatibility of many intersectional crosses in the genus Populus is caused by several pre-and postzygotic isolation mechanisms reviewed by Stettler et al (1996) and Van den Broeck et al (2005). Natural prezygotic barriers like flowering asynchrony or pollen competition can be overcome by artificial pollination experiments.…”

Section: Locusmentioning

confidence: 98%

Successful hybridisation of normally incompatible hybrid aspen (Populus tremula × P. tremuloides) and eastern cottonwood (P. deltoides)

2010

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Hybrid aspen (Populus tremula × P. tremuloides) belong to the section Populus. Eastern cottonwood (P. deltoides) is a member of the section Aigeiros within the genus Populus. These poplar sections are generally considered to be incompatible. Here, we describe successful hybridisation between these parents, producing an offspring family with 27 individuals. The hybrid character of individuals was proven by genotypes at 16 nuclear microsatellite loci. One individual was suspected to have more than the diploid chromosome number of 2n = 38 due to the observation of more than two alleles at several loci. This individual is a triploid, ascertained by flow cytometry. Two distinct growth classes of tall and dwarf plants were observed in the progeny, reflecting different degrees of postzygotic incompatibility. Two loci linked to the tested microsatellites have an effect on height growth. Some fast-growing individuals were micropropagated to test them for biomass performance together with other clones in field trials.

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“…Most of the work has been descriptive, documenting the presence of P. deltoidesspecific alleles in wild populations of P. nigra that grow near cultivated clones of P. x canadensis. Some of these studies provided evidence based on diagnostic molecular markers that clones of P. x canadensis and P. nigra do interbreed in both directions (Heinze 2008;Vanden Broeck et al 2004;Vanden Broeck et al 2005, Ziegenhagen et al 2008. Although hybrids are present almost everywhere in Europe, hybridization seems to depend heavily on local conditions.…”

Section: Introductionmentioning

confidence: 97%

With a little help from my friends: hybrid fertility of exotic Populus x canadensis enhanced by related native Populus nigra

et al. 2012

Self Cite

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Hybridization and genetic swamping by planted exotic Populus taxa are putative threats for native Populus resources. We investigated the potential for hybridization between the exotic hybrid Populus x canadensis Moench and its wild relative, the European black poplar (Populus nigra L.), by a series of pollination experiments in the greenhouse. We also tested the effect of mixtures of pollen from the taxon’s own pollen and pollen of the foreign taxon on mating success in reciprocal crosses. We observed reduced pollen and seed viability of the hybrid clones of P. x canadensis compared to the clones of the parental species P. nigra. Surprisingly, when in combination with pollen of its wild relative P. nigra, pollen of exotic P. x canadensis sired significantly better on its own flowers. In poplar breeding, the pollen mentor technique which uses pollen mixes of artificially inactivated conspecific pollen and untreated incompatible foreign pollen, has been successfully used to overcome incompatibility barriers. The results of this study suggest that in the wild, where mixed pollen loads are common, similar effects as the pollen mentor effects may enhance the invasiveness of exotic P. x canadensis. This study helps to explain former field observations and contributes to the understanding of potential environmental impacts of commercial exotic and transgene poplar plantations

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Natural hybridization between cultivated poplars and their wild relatives: evidence and consequences for native poplar populations

Cited by 83 publications

References 69 publications

Scientific Basis for Sustainable Management of Eucalyptus and Populus as Short-Rotation Woody Crops in the U.S.

Scientific Basis for Sustainable Management of Eucalyptus and Populus as Short-Rotation Woody Crops in the U.S.

Successful hybridisation of normally incompatible hybrid aspen (Populus tremula × P. tremuloides) and eastern cottonwood (P. deltoides)

With a little help from my friends: hybrid fertility of exotic Populus x canadensis enhanced by related native Populus nigra

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