Genetic Analysis of Isozyme Variants in Open Pollinated Families of Southern Beech Nothofagus nervosa (Phil) Dim et Mil

MARCHELLI, P; GALLO, L

SILVAE GENETICA

Año: 2000 vol. 49 p. 90 - 98

0037-5349

Nothofagus nervosa (= N. alpina) represents one of the mostimportant native tree species among the Southern SouthamericanTemperate Forest. Its ecological situation in Argentinawith a very reduce distribution area, overexploitation in thepast, recurrent forest fires and overgrazing makes it a suitablespecies for conservation and improvement programs.In order to conduct a complete population genetic study ofthe species in Argentina, isozyme gene markers were determined.Genetic analysis of the observed phenotypic variation wasdone applying the method described by GILLET and HATTEMER(1989). Twelve loci were analysed corresponding to six enzymesystems. Four of them were monomorphic, but two had speciesspecificalleles. Among the remainder, genetic control could bedemonstrated in five loci and hypothesis on the mode of inheritance of another one has been suggested. Finally, geneticcontrol could not be proved in two loci and discussion on thereliability of these loci as gene markers have been done.