Prospects: The Spruce Genome, a Model for Understanding Gymnosperm Evolution and Supporting Tree Improvement Efforts

2020 ◽  
pp. 215-218
Author(s):  
Ilga M. Porth ◽  
Amanda R. De la Torre ◽  
Yousry A. El-Kassaby
Keyword(s):  
Tree Improvement

A Budget Tree Improvement Program

1983 ◽  
Author(s):  
Hans Nienstaedt ◽  
Hyun Kang
Keyword(s):  
Tree Improvement ◽  
Improvement Program

Breeding for improved growth and juvenile corewood stiffness in slash pine

2007 ◽  
Vol 37 (10) ◽  
pp. 1886-1893 ◽  
Author(s):  
Xiaobo Li ◽  
Dudley A. Huber ◽  
Gregory L. Powell ◽  
Timothy L. White ◽  
Gary F. Peter
Keyword(s):  
Genetic Correlation ◽  
Growth Traits ◽  
Low Cost ◽  
Genetic Correlations ◽  
Volume Growth ◽  
Pinus Elliottii ◽  
Tree Improvement ◽  
Slash Pine ◽  
Narrow Sense Heritability ◽  
Improvement Programs

The importance of integrating measures of juvenile corewood mechanical properties, modulus of elasticity in particular, with growth and disease resistance in tree improvement programs has increased. We investigated the utility of in-tree velocity stiffness measurements to estimate the genetic control of corewood stiffness and to select for trees with superior growth and stiffness in a progeny trial of 139 families of slash pine, Pinus elliottii Engelm. grown on six sites. Narrow-sense heritability estimates across all six sites for in-tree acoustic velocity stiffness at 8 years (0.42) were higher than observed for height (0.36) and diameter at breast height (DBH) (0.28) at 5 years. The overall type B genetic correlation across sites for velocity stiffness was 0.68, comparable to those found for DBH and volume growth, indicating that family rankings were moderately repeatable across all sites for these traits. No significant genetic correlations were observed between velocity stiffness, DBH, and volume growth. In contrast, a significant, but small, favorable genetic correlation was found between height and velocity stiffness. Twenty percent of the families had positive breeding values for both velocity stiffness and growth. The low cost, high heritability and nearly independent segregation of the genes involved with in-tree velocity stiffness and growth traits indicate that acoustic methods can be integrated into tree improvement programs to breed for improved corewood stiffness along with growth in slash pine.

Commercialization potential of somatic embryogenesis in black spruce tree improvement

1994 ◽  
Vol 70 (5) ◽  
pp. 593-598 ◽  
Author(s):  
G. W. Adams ◽  
M. G. Doiron ◽  
Y. S. Park ◽  
J. M. Bonga ◽  
P. J. Charest
Keyword(s):  
Somatic Embryogenesis ◽  
Clonal Propagation ◽  
Black Spruce ◽  
Tree Improvement ◽  
Embryogenic Tissue ◽  
Improvement Program ◽  
Mature Embryos ◽  
Somatic Plants ◽  
Number Of Individuals ◽  
Potential Tool

The somatic embryogenesis process was evaluated as a potential tool for operational vegetative propagation using individuals from families currently used in the J.D. Irving, Ltd. black spruce tree improvement program. Most families were responsive although the number of individuals within families capable of producing embryogenic tissue (ET) varied greatly (1–70%). Seventy-four percent of the ET clones produced mature embryos and most of these germinated. Greenhouse survival was initially low (11%) but improved in subsequent experiments to 45% as growing regimes were refined. Demonstration plantings of the resulting somatic plants were established at two sites in New Brunswick. A total of 206 clones were cryopreserved. The potential for integrating somatic embryogenesis techniques into tree improvement and stock production programs is discussed. Key words: tree improvement, somatic embryogenesis, clonal propagation, black spruce, biotechnology

scholarly journals The Success of Tree Breeding in the Southern US

BioResources ◽  
2014 ◽  
Vol 10 (1) ◽  
pp. 1-2 ◽  
Author(s):  
Steve McKeand
Keyword(s):  
North Carolina ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Tree Breeding ◽  
Tree Improvement ◽  
State University ◽  
Improvement Program ◽  
North Carolina State University ◽  
The North ◽  
Southern Us

Nowhere in the world have tree improvement and silviculture had a bigger impact on forest productivity and value to landowners than in the southern US. The economic impact from almost 60 years of tree improvement in the southern United States has been staggering. For example, over 300,000 hectares are planted each year with seedlings from the breeding efforts with loblolly pine (Pinus taeda) by members and staff of the North Carolina State University Cooperative Tree Improvement Program. The present value of continued genetic gains from traditional tree improvement efforts is estimated to be $2.5 billion USD to landowners and citizens in the southern US.

A Canadian Example of Government-Industry Collaboration In Tree Improvement

1976 ◽  
Vol 52 (6) ◽  
pp. 283-289 ◽  
Author(s):  
C. W. Yeatman
Keyword(s):  
Seed Production ◽  
Cold Hardiness ◽  
Seed Orchard ◽  
Jack Pine ◽  
Tree Improvement ◽  
Seed Sources ◽  
Seedling Seed Orchard ◽  
Forest Region ◽  
Future Supply ◽  
High Quality Seed

A program of provenance testing, seed production and genetic improvement of jack pine was developed in the Baskatong region of western Quebec through sustained collaboration among government forest services and forest industry. Research plantations demonstrated, within a period of 10 years from establishment, the superiority in growth, cold hardiness and disease resistance of regionally adapted local seed sources. Critical differences were evident between provenances from the Boreal Forest Region and those from the adjacent Sections of the Great Lakes — St. Lawrence Forest Region.A 300-acre (120 ha) seed production area was created within a genetically superior jack pine population of natural origin in the Côte Jaune area west of Lake Baskatong. Within this population, 325 plus trees were selected, marked and recorded over two years by student crews employed in the summer. Seed harvested from the felled plus trees will be used to create a seedling seed orchard and to establish progeny tests. The plus trees are to be grafted for controlled breeding among selected progeny-tested clones at a later date. This cooperative program of tree improvement will ensure the future supply of high quality seed that will maintain and enhance the value of the forest resource.

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