Document


Title

Breeding longleaf pines for resistance to brown spot needle blight
Document Type: Journal Article
Author(s): E. B. Snyder; H. J. Derr
Publication Year: 1972

Cataloging Information

Keyword(s):
  • age classes
  • Alabama
  • artificial regeneration
  • ecosystem dynamics
  • Florida
  • forest management
  • genetics
  • Georgia
  • herbicides
  • histories
  • longleaf pine
  • Louisiana
  • Mississippi
  • pine
  • Pinus palustris
  • plant communities
  • plant diseases
  • plant growth
  • plantations
  • Scirrhia acicola
  • seedlings
  • site treatments
Region(s):
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 40693
Tall Timbers Record Number: 15484
TTRS Location Status: In-file
TTRS Call Number: Fire File
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

In tests with wind-pollinated progenies from 540 parents, heritability of brown-spot resistance was 0.57, and that height was 0.52 at age 3 years. Infection in progeny of the best 10% of parents averaged 48% compared to a population average of 63%. This 10%, plus the fastest growing seedlings, were selected for second-generation breedings. In addition, individual seedlings less than 30% infected or more than 1 ft. tall were retained. Tests with iexposed and protected progeny indicate that inherent fast height growth is not the major mechanism of resistance. The frequency of brown-spot resistant genotypes varied by seed source, especially where there were differences in parental exposure to the disease. Offspring from parents selected 30 years earlier from a heavily infected planting averaged 55% taller and had about 10% lessf brown-spot infection than those from parents with unknown history. Southwestern Alabama was the best of five geographic sources that were smapled for both height growth and brown-spot resistance.

Citation:
Snyder, E. B., and H. J. Derr. 1972. Breeding longleaf pines for resistance to brown spot needle blight. Phytopathology, v. 62, p. 325-329.