Effects of inbreeding on population mean performance and observational variances in Eucalyptus globulus

Silva, Jce, Hardner, C, Tilyard, P, Pires, AM and Potts, BM (2010) Effects of inbreeding on population mean performance and observational variances in Eucalyptus globulus. Annals of Forest Science, 67 6: 605-1-605-9. doi:10.1051/forest/2010018


Author Silva, Jce
Hardner, C
Tilyard, P
Pires, AM
Potts, BM
Title Effects of inbreeding on population mean performance and observational variances in Eucalyptus globulus
Formatted title
Effects of inbreeding on population mean performance and observational variances in Eucalyptus globulus
Journal name Annals of Forest Science   Check publisher's open access policy
ISSN 1286-4560
1297-966X
Publication date 2010-09-01
Sub-type Article (original research)
DOI 10.1051/forest/2010018
Volume 67
Issue 6
Start page 605-1
End page 605-9
Total pages 9
Place of publication Paris, France
Publisher Springer France
Collection year 2011
Language eng
Formatted abstract
• Mean performance and variances were studied in self (SELF), open pollinated (OP) and unrelated polymix (POL) crosses of common parentage in Eucalyptus globulus.

• Inbreeding depression for survival (SURV) and basal area per hectare (BAH) was the highest reported for a SELF eucalypt population, increasing with age to reach 74 and 77%, respectively, over 10 years.

• Inbreeding depression in the OP was 36% for SURV and 32% for BAH at age 10 years, and estimates of outcrossing rate from BAH were stable across ages, averaging 0.56. In contrast, OP inbreeding depression for stem diameter (DBH) of survivors decreased with age and few selfs appeared to survive to 10 years.

• There was more variation in DBH between and within SELF than POL families, with variance ratios consistent with rare and partially recessive deleterious alleles causing inbreeding depression.

• The OP variances were initially more similar to the SELF population but converged to the POL population after 10 years.

• It is argued that when outcrossing rates are low, as in the present case, inbreeding depression will be a significant force countering local adaptation in forest trees.
© INRA, EDP Sciences, 2010
Keyword Eucalyptus globulus
Self-fertilization
Mixed mating
Inbreeding depression
Outcrossing rate
REML variance components
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article number 605, pp. 1-9.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Agriculture and Food Sciences
 
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Created: Mon, 14 Mar 2011, 20:52:59 EST by Dr Craig Hardner on behalf of School of Land, Crop and Food Sciences