1. bookVolume 66 (2017): Issue 1 (December 2017)
Journal Details
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Format
Journal
eISSN
2509-8934
First Published
22 Feb 2016
Publication timeframe
1 time per year
Languages
English
access type Open Access

Expected genetic gain and genotype by environment interaction in almond (Dipteryx panamensis (Pittier) Rec. and Mell) in Costa Rica

Published Online: 28 Dec 2017
Volume & Issue: Volume 66 (2017) - Issue 1 (December 2017)
Page range: 9 - 13
Journal Details
License
Format
Journal
eISSN
2509-8934
First Published
22 Feb 2016
Publication timeframe
1 time per year
Languages
English
Abstract

Almendro (Dipteryx panamensis (Pittier) Record & Mell.) is one of the native tree species with higher wood density planted in Latin American tropical region, which has given it a reputation and international acceptance in the wood-floors markets. The tree has also a remarkable ecological value, as an important food source and habitat for several endangered fauna. This research studied the potential for genetic improvement and stability of a collection of 29 open-pollinated families of Dipteryx panamensis at 48 months of age. The materials came from three different local native populations northern from Costa Rica. Individual heritabilities for commercial volume registered moderate values, between 9 % and 22 %, while mean family heritability, ranged between 47 % and 74 % for the traits evaluated. No significant genetic differences among provenances for none of the traits evaluated were observed. The genetic correlation for commercial volume between both sites showed a value of r = 0.96, which suggests low G × E interaction. If selected the top 20 individuals from the genetic ranking in commercial volume, an expected genetic gain above 50 % in year 4 can be obtained. The use of improved almendro seeds could have great impact and motivate plantations with this tree species in tropical regions. It is concluded that a unique breeding program for the whole country is feasible.

Keywords

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