Exogenous selection shapes germination behaviour and seedling traits of populations at different altitudes in a Senecio hybrid zone | Zendy

Rebecca I. C. Ross | Zendy; Jon Ågren | Zendy; John R. Pannell | Zendy

Open Access

Exogenous selection shapes germination behaviour and seedling traits of populations at different altitudes in a Senecio hybrid zone

Author(s) -

Rebecca I. C. Ross,

Jon Ågren,

John R. Pannell

Publication year - 2012

Publication title -

annals of botany

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.567

H-Index - 176

eISSN - 1095-8290

pISSN - 0305-7364

DOI - 10.1093/aob/mcs211

Subject(s) - biology , germination , seedling , altitude (triangle) , hybrid , senecio , population , growing season , phenotypic plasticity , adaptation (eye) , local adaptation , botany , agronomy , horticulture , ecology , demography , mathematics , geometry , neuroscience , sociology

The Senecio hybrid zone on Mt Etna, Sicily, is characterized by steep altitudinal clines in quantitative traits and genetic variation. Such clines are thought to be maintained by a combination of 'endogenous' selection arising from genetic incompatibilities and environment-dependent 'exogenous' selection leading to local adaptation. Here, the hypothesis was tested that local adaptation to the altitudinal temperature gradient contributes to maintaining divergence between the parental species, S. chrysanthemifolius and S. aethnensis.

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