Efficiency of early selection in Calycophyllum spruceanum and Guazuma crinita, two fast-growing timber species of the Peruvian Amazon

Cornelius, Jonathan P., Pinedo-Ramírez, Roger, Sotelo Montes, Carmen, Ugarte-Guerra, L. Julio, and Weber, John C. (2018) Efficiency of early selection in Calycophyllum spruceanum and Guazuma crinita, two fast-growing timber species of the Peruvian Amazon. Canadian Journal of Forest Research, 48 (5). pp. 517-523.

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Abstract

Bolaina (Guazuma crinita Mart., Malvaceae) and capirona (Calycophyllum spruceanum (Benth.) Hook. f. ex K. Schum., Rubiaceae) are fast-growing Amazonian timber trees. In Peru, they are increasingly being used in agroforestry systems and plantations, and interest in developing improved germplasm is growing. However, tree improvement incurs both direct costs and interest costs on investments; because of this, early selection is of interest. We examine the efficiency of early selection 13 or 17 months after field trial establishment. These are compared with selection after 49 or 53 months using two efficiency metrics: one based on discounted response to selection per unit of present value of cost, and the second on net discounted revenues, using discount rates of 5%, 10%, and 15%. Our metrics differed from those used in previous studies by taking into account direct costs, as well as costs of capital. Wefound that in most scenarios, early selection was attractive, partly due to direct cost savings. We conclude that in evaluating the efficiency of early selection, lack of consideration of direct costs may produce erroneous results. We also explore some general implications of the results.

Item ID: 53650
Item Type: Article (Research - C1)
ISSN: 1208-6037
Keywords: progeny test, tree improvement, age-age correlation, financial analysis, breeding strategies
Copyright Information: Copyright remains with the author(s) or their institution(s).
Funders: Consultative Group on International Agricultural Research (CGIAR)
Date Deposited: 16 May 2018 07:34
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0705 Forestry Sciences > 070507 Tree Improvement (Selection and Breeding) @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0705 Forestry Sciences > 070504 Forestry Management and Environment @ 50%
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