Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (149 KB bytes)

Title: Risk Analysis of Loblolly Pine Controlled Mass Pollination Program

Author: Byram, T.D.; Bridgwater, F.E.;

Date: 1999

Source: Proceedings of the 25th Biennial Southern Forest Tree Improvement Conference, New Orleans, Louisiana, USA

Publication Series: Miscellaneous Publication

Description: The economic success of controlled mass pollination (CMP) depends both upon the value of the genetic gain obtained and the cost per seed. Crossing the best six loblolly pine (Pinus taeda) parents currently available in each deployment region of the Western Gulf Forest Tree Improvement Program will produce seed with an average additional gain in mean annual increment at age 20 of 16.1 compared to seed from open-pollinated seed orchards with 30% pollen contamination. The presenf value of this additional gain in growth rate is $0.177 per seed, which compares favorably to the estimated production cost $0.05 per seed. Three different CMP scenarios were evaluated by varying the number of female strobili per isolatior bag, the cost of CMP per isolation bag, and the seed obtained per strobilus pollinated. The distributions for the possible number of strobili per isolation bag and cost of CMP per isolation bag were estirnatd from two pilot-scale CMP programs. CMP cost per isolation bag included the cost of pollen collection, the installation and removal of the isolation bag, and a single pollen application. Distributions for strobili per isolation bag and the cost per isolation bag were assumed to be the same for all three scenarios. Data fiorn three loblolly pine control-pollination programs were used to estimate thy distribution for the average annual seed yield per strobilus pollinated and formed the basis for the three different scenarios. The average annual cost of CMP seed production varied substantially among programs. Where seed yields were high and consistent, the annual CMP cost averaged $0.0535 per seed with a range of $0.0119 to $0.1844. If seed yields were high but twice as variable, the annual CMP cost averaged $0.0594 per seed with a range of $0.0112 to $0.4129. Where seed yields were both lower and less dependable, the annual CMP cost ranged Tom $0.0096 to $12.120 per seed with an average of $0.1275. However, when CMP seed costs were weighted by seed production across years, all thre scenarios were economically attractive. CMP seed production weighted for total seed production we $0.0473, $0.0475 and $0.0555 for the three scenarios. The much larger quantity of cheap seed produced in good years more than offset the expensive seed produced in poor years. The annual expense per seed exceeded the breakeven cost of $0.177 only 0.2, 1.1 and 10.3 percent of the time, respectively.

Keywords: mass pollination, risk analysis, Pinus taeda, seed production

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Byram, T.D.; Bridgwater, F.E. 1999. Risk Analysis of Loblolly Pine Controlled Mass Pollination Program. Proceedings of the 25th Biennial Southern Forest Tree Improvement Conference, New Orleans, Louisiana, USA

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.