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dc.contributor.author
Pastorino, Mario Juan
dc.contributor.author
Sá, Mercedes S.
dc.contributor.author
Aparicio, Alejandro G.
dc.contributor.author
Gallo, Leonardo Ariel
dc.date.available
2017-06-07T20:32:32Z
dc.date.issued
2013-10
dc.identifier.citation
Pastorino, Mario Juan; Sá, Mercedes S.; Aparicio, Alejandro G.; Gallo, Leonardo Ariel; Variability in seedling emergence traits of Patagonian Cypress marginal steppe populations; Springer; New Forests; 45; 1; 10-2013; 119–129
dc.identifier.issn
0169-4286
dc.identifier.uri
http://hdl.handle.net/11336/17694
dc.description.abstract
Genetic information on adaptive traits is crucial for prediction of the evolution of natural populations in relation to global climate change. The seedling emergence process together with germination is a key adaptive stage in any seeding species. We aim to analyze variability in seedling emergence traits within and among marginal populations of Patagonian Cypress (Austrocedrus chilensis (D.Don) Pic. Ser. et Bizzarri), which have been suggested to be of conservation relevance. We performed an emergence trial in a greenhouse with seeds collected from 177 open-pollinated trees from 10 populations. A sigmoidal curve was fitted to the cumulative emergence data (in percentage of the sown seeds) for each replicate of each family. Variability was estimated using ANOVA for six variables: emergence capacity (EC), emergence energy (EE), energy period (EP), emergence initiation (t10), emergence cessation (t90) and emergence duration (Dur). The overall trial mean for EC was 76.2 %, while EE was only 27.6 %. Hence, most seedlings emerged after the energy period, which is interpreted as a bet-hedging strategy. Both “population” and “family” factors significantly affected all variables. The proportions of “family” variances were higher than “population” ones for EC, EE, Dur and t90, but the opposite was found for EP and t10, which is evidence of differentiation among populations. Variability among families may be due to both genetic and environmental causes, including maternal effects. However, the relatively high proportion of family variability in EC and EE suggests acceptable levels of additive genetic variance, which would not hinder the potential to evolve in these specific traits. Conversely, the chances to adapt in EP and t10 are lower, and consequently local extinctions driven by global climate change seem possible.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Adaptation
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Austrocedrus Chilensis
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Genetic Drift
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Germination
dc.subject.classification
Silvicultura
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Agricultura, Silvicultura y Pesca
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CIENCIAS AGRÍCOLAS
dc.title
Variability in seedling emergence traits of Patagonian Cypress marginal steppe populations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2015-10-15T20:01:13Z
dc.journal.volume
45
dc.journal.number
1
dc.journal.pagination
119–129
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Pastorino, Mario Juan. Instituto Nacional de Tecnologia Agropecuaria. Centro Reg.patagonia Norte. Estacion Exptal.agrop.s.c.de Bariloche. Grupo de Genetica Forestal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
dc.description.fil
Fil: Sá, Mercedes S.. Instituto Nacional de Tecnologia Agropecuaria. Centro Reg.patagonia Norte. Estacion Exptal.agrop.s.c.de Bariloche. Grupo de Genetica Forestal; Argentina
dc.description.fil
Fil: Aparicio, Alejandro G.. Instituto Nacional de Tecnologia Agropecuaria. Centro Reg.patagonia Norte. Estacion Exptal.agrop.s.c.de Bariloche. Grupo de Genetica Forestal; Argentina
dc.description.fil
Fil: Gallo, Leonardo Ariel. Instituto Nacional de Tecnologia Agropecuaria. Centro Reg.patagonia Norte. Estacion Exptal.agrop.s.c.de Bariloche. Grupo de Genetica Forestal; Argentina
dc.journal.title
New Forests
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s11056-013-9395-3
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11056-013-9395-3


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