Seed Source Testing of Alabama Loblolly Pine: Implications for Seed Movements and Tree Improvement Programs

1984 ◽  
Vol 8 (4) ◽  
pp. 189-193 ◽  
Author(s):  
Stuart E. Duba ◽  
James F. Goggans ◽  
Richard M. Patterson
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Tree Improvement ◽  
Central Portion ◽  
Average Growth ◽  
Seed Sources ◽  
Northern Areas ◽  
Southern Central ◽  
Improvement Programs ◽  
Pinus Taeda L

Abstract Eight Alabama loblolly pine (Pinus taeda L.) seed sources were compared by establishing one plantation near each source of seed. On the basis of growth after 14 years, the eight sources segregated into three groups that corresponded with southern, central, and northern geographic areas. Southern sources generally had the largest heights and volumes, while central sources were intermediate and northern sources smallest. Although some source-by-location interactions did occur, southern sources could be utilized in the central portion of the state and central sources could be utilized in northern areas to provide above-average growth. Implications for tree improvement programs are made.

Loblolly Pine Provenance Test in Southern Arkansas 25th Year Results

1983 ◽  
Vol 7 (2) ◽  
pp. 71-75 ◽  
Author(s):  
O. O. Wells ◽  
C. C. Lambeth
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Gulf Coast ◽  
Seed Sources ◽  
Potential Gain ◽  
Provenance Test ◽  
Pinus Taeda L ◽  
Forest Managers

Abstract Trees from some eastern seed sources of loblolly pine (Pinus taeda L.) average 8 feet taller than local Arkansas trees after 25 years in southern Arkansas plantings. Trees from most of the range appear well adapted to the climate of southern Arkansas. Only trees from near the Gulf Coast are obviously poorly adapted. Forest managers should weigh this substantial, potential gain carefully against possible risk when choosing seed sources for planting in and near southern Arkansas.

Fifth-Year Performance of Progenies of Selected South African Slash and Loblolly Pine Clones

1981 ◽  
Vol 5 (2) ◽  
pp. 62-65
Author(s):  
John F. Kraus ◽  
Earl R. Sluder
Keyword(s):  
South African ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Tree Improvement ◽  
Slash Pine ◽  
The South ◽  
Improvement Program ◽  
Seed Orchards ◽  
Pinus Taeda L ◽  
Better Than

Abstract Control-pollinated polymix progenies of 9 slash pine (P. elliottii Engelm.) and 10 loblolly (Pinus taeda L.) pine from some of the best clones in a South African tree improvement program were tested in Georgia. Overall, the progenies of the South African selections in both species have done well after five years in the field. One of the slash pine and three of the loblolly pine families were better than open-pollinated progeny from established seed orchards.

Analysis of a Virginia Pine Seed Source Trial in the Interior South

1980 ◽  
Vol 4 (3) ◽  
pp. 153-156
Author(s):  
John Talbert ◽  
Gordon White ◽  
Charles Webb
Keyword(s):  
South Carolina ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Seed Orchard ◽  
Substantial Improvement ◽  
Seed Sources ◽  
South Central ◽  
Stem Straightness ◽  
Pinus Taeda L ◽  
Better Than

Abstract In a comparison of three diverse seed sources of improved Virginia pine (Pinus virginiana Mill.) planted at two locations in north Alabama and south-central Tennessee, only stem straightness differences were statistically significant at six years of age. Families and seed sources tended to maintain the same ranking relative to each other at both locations. A majority of families performed significantly better than a Virginia pine commercial check lot, indicating substantial improvement in growth and straightness characteristics in one generation of selection. Two improved loblolly pine (Pinus taeda L.) seed orchard mixes from the South Carolina Piedmont showed a 27-percent height advantage over the Virginia pine at age 6.

scholarly journals Controlled mass pollination in loblolly pine to increase genetic gains

1998 ◽  
Vol 74 (2) ◽  
pp. 185-189 ◽  
Author(s):  
F. E. Bridgwater ◽  
D. L. Bramlett ◽  
T. D. Byram ◽  
W. J. Lowe
Keyword(s):  
Key Words ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Forest Tree ◽  
Pilot Scale ◽  
Tree Improvement ◽  
Improvement Program ◽  
Seed Orchards ◽  
Genetic Gains ◽  
Pinus Taeda L

Controlled mass pollination (CMP) is one way to increase genetic gains from traditional wind-pollinated seed orchards. Methodology is under development by several forestry companies in the southern USA. Costs of CMP depend on the efficient installation, pollination, and removal of inexpensive paper bags. Even in pilot-scale studies these costs seem reasonable. Net present values from CMP in a sample of sixty-seven loblolly pine (Pinus taeda L.) seed orchards in the Western Gulf Forest Tree Improvement Program are conservatively expected to average $108 per acre of plantation established with seedlings from CMP among the best six parents in each of five breeding regions and $154 per acre for CMP among the best pair of parents in each breeding region. Key words: supplemental mass pollination, expected genetic gains, pollen contamination

Texas and Louisiana Lobolly Pine Study Confirms Importance of Local Seed Sources

1980 ◽  
Vol 4 (3) ◽  
pp. 127-132 ◽  
Author(s):  
Ernest M. Long
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Seed Source ◽  
Growth Data ◽  
Nonlocal Sources ◽  
Seed Sources ◽  
Volume Production ◽  
Pinus Taeda L

Abstract On four Loblolly pine (Pinus taeda L.) planting sites in Texas and Louisiana local seed sources produced an average of 20 percent more volume than nonlocal sources after 20 years. Trees from nonlocal seed sources tended to have more variation in volume production between plantations than trees from local seed sources. Growth data from these plantations indicate that seed source determines to a great extent how biologically and economically successful a plantation will be.

Effect of Rehydration on in Vitro Germination of Loblolly Pine Pollen

1990 ◽  
Vol 14 (1) ◽  
pp. 48-51 ◽  
Author(s):  
J. B. Jett ◽  
L. John Frampton
Keyword(s):  
Moisture Content ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
In Vitro Germination ◽  
Moisture Contents ◽  
Pine Pollen ◽  
Percent Germination ◽  
Improvement Programs ◽  
Pinus Taeda L

Abstract At moisture contents of less than 15%, loblolly pine (Pinus taeda L.) pollen displayed a marked sensitivity to rehydration prior to in vitro germination testing. At moisture contents above 15%, percent germination was relatively insensitive to increasing moisture content. The relationshipbetween length of rehydration time and pollen moisture content was highly significant. However, the commonly used 16-hour rehydration period is longer than is necessary since 1-2 hours of rehydration adequately ensure peak germination. Shortening of the rehydration period allows operationaltree improvement programs to test a greater number of pollen lots in a given period of time. South. J. App. For. 14(1):48-51.

scholarly journals Analysis of cellulose microfibril angle using a linear mixed model in Pinus taeda clones

2008 ◽  
Vol 38 (6) ◽  
pp. 1676-1689 ◽  
Author(s):  
Fikret Isik ◽  
Marcia Gumpertz ◽  
Bailian Li ◽  
Barry Goldfarb ◽  
Xuan Sun
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Recurrent Selection ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Growth Ring ◽  
Microfibril Angle ◽  
Improvement Programs ◽  
Cost Efficient ◽  
Pinus Taeda L

Variation in microfibril angle (MFA) (degrees) among loblolly pine ( Pinus taeda L.) full-sib families and clones was investigated using 43 clones from nine full-sib crosses tested at two locations. When the experiments were 12 years old, a total of 316 trees were drilled and 12 mm thick wood increment cores were collected. MFA for each growth ring in the wood core was measured using the SilviScan-2 tool. A quadratic mixed model was fitted to evaluate the MFA variation over different rings. Among the error covariance structures tested in the model, autoregressive order 1 was the best model for producing MFA estimates with the smallest errors. Estimated MFA was about 33° in the pith (ring 1) of the trees and decreased to 18° in the outer wood (ring 11). Full-sib crosses and clones within crosses explained about 12.5% of the total phenotypic variation. Repeatability of full-sib family means (H2f = 0.46) was moderate but repeatability of clone means was high (H2c = 0.79). Although it is possible to improve (decrease) MFA with recurrent selection in tree improvement programs to improve lumber quality, cost efficient and rapid methods for measuring MFA are needed.

scholarly journals A Consensus Map for Loblolly Pine (Pinus taeda L.). I. Construction and Integration of Individual Linkage Maps From Two Outbred Three-Generation Pedigrees

Genetics ◽  
1999 ◽  
Vol 151 (1) ◽  
pp. 321-330 ◽  
Author(s):  
Mitchell M Sewell ◽  
Bradley K Sherman ◽  
David B Neale
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Fragment Length Polymorphism ◽  
Random Amplified Polymorphic Dna ◽  
Mapping Function ◽  
Genetic Maps ◽  
Linkage Data ◽  
Linkage Maps ◽  
Consensus Map ◽  
Pinus Taeda L

Abstract A consensus map for loblolly pine (Pinus taeda L.) was constructed from the integration of linkage data from two unrelated three-generation outbred pedigrees. The progeny segregation data from restriction fragment length polymorphism, random amplified polymorphic DNA, and isozyme genetic markers from each pedigree were recoded to reflect the two independent populations of parental meioses, and genetic maps were constructed to represent each parent. The rate of meiotic recombination was significantly greater for males than females, as was the average estimate of genome length for males {1983.7 cM [Kosambi mapping function (K)]} and females [1339.5 cM(K)]. The integration of individual maps allows for the synthesis of genetic information from independent sources onto a single consensus map and facilitates the consolidation of linkage groups to represent the chromosomes (n = 12) of loblolly pine. The resulting consensus map consists of 357 unique molecular markers and covers ∼1300 cM(K).

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