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 (237 KB bytes)

Title: Family losses following truncation selection in populations of half-sib families

Author: Roberds, J. H.; Namkoong, G.; Kang, H.;

Date: 1980

Source: Silvae Genetica ISSN, Vol. 29, 4 p.

Publication Series: Miscellaneous Publication

Description: Family losses during truncation selection may be sizable in populations of half-sib families. Substantial losses may occur even in populations containing little or no variation among families. Heavier losses will occur, however, under conditions of high heritability where there is considerable family variation. Standard deviations and therefore variances of family loss, however, change little over the range of heritability. Increasing the intensity of selection causes the mean loss to increase but has little effect on the standard deviation of loss. As the number of families in the base population rises, both the mean loss and variance of loss increase, but the proportion of families lost remains almost constant. Some families will be lost in almost all selection operations, even those undertaken under conditions of low expected family losses, since variance of family loss is at moderate levels over a wide range of conditions.

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:


Roberds, J. H.; Namkoong, G.; Kang, H. 1980. Family losses following truncation selection in populations of half-sib families. Silvae Genetica ISSN, Vol. 29, 4 p.

 


 [ 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.