Interspecific pine hybrids II. Genotype by environment interactions across Australia, Swaziland, and Zimbabwe

Dungey, H. S., Dieters, M. J., Gwaze, D. P., Toon, P. G. and Nikles, D. G. (2000) Interspecific pine hybrids II. Genotype by environment interactions across Australia, Swaziland, and Zimbabwe. Forest Genetics (Slovak Republic); International Journal of Forest Genetics, 7 1: 19-28.

Author Dungey, H. S.
Dieters, M. J.
Gwaze, D. P.
Toon, P. G.
Nikles, D. G.
Title Interspecific pine hybrids II. Genotype by environment interactions across Australia, Swaziland, and Zimbabwe
Journal name Forest Genetics (Slovak Republic); International Journal of Forest Genetics   Check publisher's open access policy
ISSN 1335-048X
Publication date 2000
Sub-type Article (original research)
Volume 7
Issue 1
Start page 19
End page 28
Total pages 10
Place of publication Gympie, Australia
Publisher Queensland Forestry Research Institute
Language eng
Subject 0705 Forestry Sciences
Abstract Collaborative research trials of Queensland-bred pine hybrids have been established in many sites outside Australia. These trials enable the estimation of genotype P environment effects, which are important in determining the level of regionalisation needed in any breeding program. Correlations across sites testing hybrids between Pinus caribaea var.hondurensis and both P. oocarpa and P. tecunumanii established in Australia, Swaziland, and Zimbabwe are reported. Diameter at breast height and height were measured in all trials, straightness in Australia and Zimbabwe, and wind firmness and lean in Australia, all at five years of age. For each pair of tests, additive genetic correlations and the correlation between full-sib family means were estimated for growth traits across sites. Genetic correlations between test-pairs located within the same country were all strong (0.65 to 0.95); however for pairs of tests in different countries the genetic correlations averaged 0.41 and 0.38 for P. oocarpa and P. tecunumanii hybrids, respectively. Family mean correlations were not as strong as genetic correlations, although they followed a similar pattern. A hybrid-production strategy, involving a two-staged approach of (a) reproducing proven superior families for local deployment and (b), crossing parents with high (hybrid) breeding values to produce additional families for testing across a broad range of sites for future deployment, is proposed
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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Created: Thu, 01 Jul 2010, 13:36:07 EST by Thelma Whitbourne on behalf of Faculty Of Nat Resources, Agric & Veterinary Sc