Skip to main content

Genetic Variation and Heritability of Melampsora Leaf Rust Resistance in Eastern Cottonwood

The full text article is temporarily unavailable.

We apologise for the inconvenience. Please try again later.

Much variation in resistance to a Melampsora leaf rust was encountered in an eastern cottonwood provenance and progeny test at Wooster, Ohio. This test, one planting of the NC-99 Regional Cooperative Study, consists of 228 clones originating from 76 parent trees. Disease resistance was rated on a visual scale from 1 to 7. Differences in resistance among and within open-pollinated families were significant. There were no differences between ramets of the same clone. Pronounced differences in rust damage and its rate of progression were related to geographic location of the seed parent. Families derived from parent trees in Missouri and Illinois were more resistant than those from Ohio, Pennsylvania, and Indiana. Broad-sense heritability estimates for disease resistance were high (0.88-0.95). Ease of recognizing Melampsora-resistant phenotypes, strong genetic control of the trait, and advantages of vegetative propagation should contribute toward rapid, substantial improvement in rust resistance. Selection for resistance is compatible with selection for growth rate and form. Relative resistance may be a direct determinant of annual diameter growth. Forest Sci. 21:278-282.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: Populus deltoides Bartr; breeding; provenance and progeny test; selection

Document Type: Journal Article

Affiliations: Graduate Research Assistant, School of Forestry and Wildlife Management, Louisiana State University, Baton Rouge, La. 70803

Publication date: 01 September 1975

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more