Results 261 to 270 of about 18,435 (307)

Arguments for Redwood Clonal Forestry

1993
Some concerned citizens are cautious about clonal forestry because they worry about “fooling Mother Nature”. But Mother Nature normally clones coast redwood (Sequoia sempervirens). Stump sprouts, or sometimes stem sprouts or root sprouts or adventitious shoots, produce multiple copies of successful clones in local clumps for two, three, or even more ...
J. A. Rydelius, W. J. Libby
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Unequal clonal deployment improves genetic gains at constant diversity levels for clonal forestry

Tree Genetics & Genomes, 2011
Maximizing genetic gain at an acceptable diversity level is an ideal outcome of selection and deployment. Based on this criterion, this study investigated the efficiency of unequal clonal deployment strategies for clonal forestry and compared them with truncation selection and equal deployment (truncation deployment).
Yuhui Weng, Yill Sung Park, Dag Lindgren
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Genetic variances among clonally propagated populations of tamarack and the implications for clonal forestry

Canadian Journal of Forest Research, 1987
Genetic variances of three tamarack (Larixlaricina (Du Roi) K. Koch.) populations in central New Brunswick were examined using vegetatively propagated materials. The component of variance due to clones within families was large for both 5-year height and survival and was partitioned into additive and nonadditive genetic variances.
Y. S. Park, D. P. Fowler
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Estimating genetic gains from alternative breeding strategies for clonal forestry

Canadian Journal of Forest Research, 1992
Concepts and procedures are presented for the analysis of progeny trials that incorporate clonal replication as a means to resolve variance arising from nonadditive gene effects. Components of variance from the linear model may be expressed in terms of expected covariances among relatives, and these, in turn, may be used to derive approximations of ...
T.J. Mullin, Y.S. Park
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Past, Present, and Anticipated Applications of Clonal Forestry

1993
Trees are among the few natural resources that can be renewed, and the need for trees and the wood that they provide is continuing to increase with increases in world population and the striving of peoples to maintain or increase their standards of living.
J. Kleinschmit, D. K. Khurana, H. D. Gerhold, W. J. Libby   +3 more
openaire   +1 more source

Limit theorems and a general framework for risk analysis in clonal forestry

Mathematical Biosciences, 1997
Use of clonally propagated plantings in reforestation offers management advantages of phenotypic uniformity and high yields. Disadvantages include low genetic diversity and the possibility that the clone or clones chosen are particularly susceptible to attack by an insect or pathogen unforeseen as a problem at the time of clonal selection.
Bishir, John, Roberds, James
openaire   +2 more sources

Biotechnology and Clonal Forestry

1993
Traditionally, forests have been regenerated from seedlings derived from bulked seed collected in nature, or more recently from seeds collected from randomly pollinated plus-trees. In most of these forests there is a large variation in growth, form, and vigor. Besides, there are forest tree species that are characterized by poor and irregular seed set,
openaire   +1 more source

Organization and Implementation of a Clonal Forestry Program

1993
A successful large-scale operational clonal forestry program has evolved in eastern Ontario, Canada since 1975. The beginning of this program can be attributed to three main factors: (1) the demonstrated growth of improved hybrid poplar clones in field tests, (2) the developing wood supply shortage of a local pulp and paper mill, and (3) the ...
S. Strobl, R. W. Evers
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Clonal Forestry with Yellow-Cedar

1993
Stecklings have been the major propagule type for the reforestation of yellow-cedar [Chamaecyparis nootkatensis (D. Don) Spach] over the past 15 years in British Columbia. Over 70% of the planting stock since 1975 has been Stecklings, and currently, one-half to three-quarters of a million Stecklings are planted annually.
openaire   +1 more source

Comparison of Experimental Designs for Clonal Forestry Using Simulated Data

Forest Science, 2006
Abstract Various alternatives for the design of clonal field trials in forestry were studied using simulated data to identify “optimal𠇍 or “near-optimal𠇍 scenarios for the estimation of genetic parameters. The simulated field site consisted of a rectangular grid on which 256 clones with 8 ramets each were installed.
Salvador A. Gezan, Timothy L. White, Dudley A. Huber   +2 more
openaire   +1 more source