Genetic variation of five natural populations of Corsican pine (Pinus nigra subsp. laricio var. corsicana)

Portefaix, C.

Annales des Sciences Forestieres 46(3): 217-232

1989


ISSN/ISBN: 0003-4312
Accession: 002118439

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Abstract
Results of progeny tests in France of 97 wind-pollinated families from 5 stands (representing isolated populations) in N. Corsica are reported. Growth characteristics were assessed from ages 2 to 11 years (forking defects were assessed in 1983, 84 and 85). Phenotype differences were mainly explained by juvenile growth performance, and a clinal variation is likely, depending on altitude. Kullback test values showed large discrepancies in genetic structure among the five stands. Results are discussed in the context of: genetic differences of isolated populations, particularly natural selection pressures (in this case, rainfall); and genetic drift and factors liable to reduce rate of consanguinity (such as fire, human activity).