At 03:22 PM 10/30/97 -0500, Brian Stone wrote: > Would someone please direct me to research that proves or >disproves the following statement. > >" phenotypic "plus" tree selections do not generally yield genetically >superior progeny." > >I am looking into the question of "high grading." It has >been said and seems intuitively correct that the practice of "cutting >the best and leaving the rest" will lead to genetic decline in the >offspring of "the rest." True or false. This is a great question, one I've often wondered about, but not had much time to look into. I have one citation: "Genetic Diversity - An Indicator of Sustainability" George P. Buchert Ontario MNR bucherge@epo.gov.on.ca (this may be old) Paper presented at "Advancing Boreal Mixedwood Management in Ontario" Oct. 1995 He is straightforward on this point: "Harvesting practices such as negative silvicultural selection (highgrading) or liquidation cutting of target species have serious genetic consequences." He goes on to give some examples and citations from the literature. ...Sam ============ Samuel J. Radcliffe =============== Voice: 414-276-2062 George Banzhaf & Company Fax: 414-276-5206 225 East Michigan Street SamR@pitnet.net Milwaukee, WI 53202 ==========================================
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