INVESTIGADORES
PASTORINO Mario Juan
artículos
Título:
How many seed transfer zones are necessary for the preservation of the genetic identity of Austrocedrus chilensis natural populations in Argentina?
Autor/es:
PASTORINO, MARIO JUAN
Revista:
RESTORATION ECOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2012 vol. 20 p. 551 - 554
ISSN:
1061-2971
Resumen:
Two different studies based on isozymes that include
genetic structure analysis have arrived at contrasting conclusions
regarding the minimum number of seed transfer
zones for Patagonian cypress (Austrocedrus chilensis)
in Argentina that are required in order to avoid genetic
contamination in restoration programs. Unfortunately, the
more recent article lacks discussion on these controversial
results, which is, therefore, the purpose of this article. The
reliability of the markers used and the sampling performed
in these studies are evaluated comparatively. The later
study found higher levels of diversity and differentiation
but paradoxically suggested that only two seed transfer
zones would be enough to preserve the genetic identity of
the natural populations of the species, whereas the earlier
study concluded that at least five are necessary. Arguments
are presented here for the case that definition of fewer than
five genetically homogeneous groups is absolutely inappropriate
and implies a probable risk of genetic contamination
and maladaptation.