You are here: Home
/ Publication Information
Title: Genetics of cold hardiness in a cloned full-sib family of coastal Douglas-fir
Author: Anekonda, T.S.; Adams, W.T.; Aitken, S.N.; Neale, D.B.; Jermstad, K.D.; Wheeler, N.C.
Source: Canadian Journal of Forest Research. 30(5):837-840
Description: Variation in cold-hardiness traits, and their extent of genetic control and interrelationships, were investigated among individuals (clones) within a single large full-sib family of coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) from Oregon. Cold injury to needle, stem, and bud tissues was evaluated in fall 1996 and spring 1997 following artificial freeze testing of detached shoots collected from 4-year-old ramets (rooted cuttings). Variation among clones in cold-injury scores was significant (p < 0.01) for all shoot tissues in both fall and spring and averaged about three times the magnitude previously observed among open-pollinated families of this species. Thus, improving cold hardiness by within-family selection appears to hold much promise. Striking similarities in relative magnitudes of heritability estimates and genetic correlations in the full-sib family, compared with breeding populations, support the following hypotheses about the quantitative genetics of cold hardiness in this species: (i) heritability of cold hardiness (both broad-and-narrow-sense) is stronger in the spring than in the fall; (ii) cold hardiness of different shoot tissues in the same season is controlled by many of the same genes; and (iii) genetic control of fall cold hardiness is largely independent of cold hardiness in the spring.
View or Print this Publication (0 bytes)
- 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.
Anekonda, T.S.; Adams, W.T.; Aitken, S.N.; Neale, D.B.; Jermstad, K.D.; Wheeler, N.C. 2000 Genetics of cold hardiness in a cloned full-sib family of coastal Douglas-fir. Canadian Journal of Forest Research. 30(5):837-840
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility