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 (555 KB bytes)

Title: Family-site interaction in Pinus radiata: implications for progeny testing strategy and regionalised breeding in New Zealand.

Author: Johnson, G.R.; Brudon, R.D.;

Date: 1990

Source: Silvae Genetica. 39(2): 55-62

Publication Series: Scientific Journal (JRNL)

Description: A progeny test of 170 open-pollinated families from second-generation plus trees of Pinus radiata was established on four sites in New Zealand in 1981. Two test sites were on volcanic purnice soils in the Central North Island region and two were on phosphate-retentive clay soils in the Northland region.

Assessments of volume growth, stem straightness, mal-format on, and branch habit were made at age 4.5 years.

Family x site interaction variance components for stem volume were highly significant (e = .01) between pumice and clay sites, and also between the clay sites of differing fertilities, but relatively small between the two pumice sites. When the interactions for stem volume were studied in terms of genetic correlations between sites quite strong interactions between sites within both regions were very minor, even though the Northland clay sites were of widely different fertility.

Family-site interactions for stem straightness and branch habit scores were less marked overall than for stem volume. For malformation the interactions were marked but only in relation to weakly expressed family differences.

Genetic gains were predicted, using multi-site index selection, for stem volume growth under alternatives testing procedures and patterns of regionalisation. On this basis failing to test within a region would lose 50% or more of the potential gain for that region. However, it was possible to select families which performed well in both regions, such that regionalisation would only raise average genetic gain from 22% to 25%.

Keywords: Genetic correlation, genetic gain, genotype-environment interaction, plant breeding, Pinus radiata, regionalisation, selection index, tree breeding

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.

XML: View XML

Citation:


Johnson, G.R.; Brudon, R.D. 1990. Family-site interaction in Pinus radiata: implications for progeny testing strategy and regionalised breeding in New Zealand. Silvae Genetica. 39(2): 55-62

 


 [ 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.