Seed provenance for changing climates: early growth traits of nonlocal seed are better adapted to future climatic scenarios, but not to current field conditions

摘要: The urgency to repair degraded ecosystems is challenged by the need future-proof populations deal with changing climates. Therefore, it necessary know if source gene-pools are resilient both current and future climatic conditions. We tested this question pioneer shrub Hardenbergia violacea (Fabaceae), an important species for restoration in eastern Australia. evaluated situ ex performance of seed from eight provenances, two local six regions receiving hotter wetter spring autumn conditions and/or drier winters we included wild commercial collections. compared survivorship seedlings climate-houses that emulated predicted temperature rainfall. In field, measured germination seedling survivorship. used neutral codominant markers provide inbreeding heterozygosity estimates evaluate against health All provenances survived conditions, but were poorest performers scenario nonlocal provenances. No provenance more than a fortnight climate-house simulated, predicted, extreme weather event drought (35/22°C 12 hours day/night, 50 mL/week = 220 mm rainfall). Heterozygosity was positively associated plant surviving plants, plants poor condition had high estimates. performed poorly most survivors contribution individual genetic variation stress tolerance will be consideration when selecting