Provenance variation and genetic parameters in a trial of Pinus caribaea morelet var. bahamensis Barr. and Golf.
1994
Yong-Qi Zheng | Huo-Ran Wang (Chinese Academy of Forestry, Beijing (China). Inst. of Forestry Research) | Ennos, R.
A combined provenance/progeny trial of P. caribaea var. bahamensis was established at a single site in Guangxi province, China in 1990. Fourteen provenances were used in the trial; the number of families within provenances varied from 3 to 10 and totalled 121. Three growth traits (height, diameter and crown width) were investigated. Significant genetic variation was found in growth traits among regions, provenances within region and families within provenance, with the Abaco Island and New Providence provenances superior and those from Andros Island inferior. Family heritabilities for all traits are much higher than individual heritabilities. Results suggest that provenance selection would be the first step for the genetic improvement of the species and substantial genetic gain can be achieved by family selection within provenance. Genetic correlations among traits were found to be significant. Breeding strategy for the species is also discussed in the paper
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