Genetic parameters of growth, and resistance to the shoot borer, in young clones of the tree Cedrela odorata (Meliaceae)
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| Format: | Artículo científico |
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Universidad de Costa Rica
2019
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| author | Salvador Sampayo-Maldonado |
| author_facet | Salvador Sampayo-Maldonado |
| contents | Genetic parameters of growth, and resistance to the shoot borer, in young clones of the tree Cedrela odorata (Meliaceae) Salvador Sampayo-Maldonado Javier López-Upton Vicente Sánchez-Monsalvo Marcos Jiménez-Casas Biología shoot borer genetic gain heritability Cedrela odorata insect resistance Damage by Hypsipyla grandella Zeller restricts the success of plantations of Cedrela odorata. The most critical and vulnerable infection period by H. grandella is during the first three years. The aim was to estimate the expected genetic gain for the selection of clones of fast growth and resistant to the attack by this insect. A trial with 40 clones produced by grafting was planted in Veracruz, Mexico. Heritability, genetic correlations and genetic gain of clones were estimated with data at two years-old. The survival rate of the trial was of 97 % (466 living ramets in total), 2.84 m in total high and 2.32 cm of average normal diameter. Aditionally, 9.9 % of the ramets did not present attacks, indication of evasion, and 0.6 percent without response to attack. With response to attack 89.5 % of the ramets (several degrees of tolerance): 29 % with a single shoot, 14.2 % with several shoots and 46.3 % with a dominant shoot of several shoots formed. The clonal heritability of normal diameter, height, volume, stem taper index, number of attacks and response to the attack was H2c = 0.81, 0.80, 0.81, 0.61, 0.34, and 0.26. The genetic correlations between height, diameter and volume were ≥ 0.95, and the correlation of the volume with the incidence and the response to the attack was rg = -0.31 and rg = 0.62, that is a decrease in number of attacks and moderate increase in tolerance. With a selection intensity of 10 %, selecting the four clones with higher volume will produce a genetic gain of 82 % for volume, a decrease of 10.9 % of number of attacks and 6.3 % of better recovery from damage; this is more tolerance to the insect attack. The genetic gain justifies the use of the best clones in commercial plantations in Veracruz, Mexico. 2019 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44965786015 https://www.redalyc.org/journal/449/44965786015/ https://www.redalyc.org/journal/449/44965786015/html/ https://www.redalyc.org/journal/449/44965786015/44965786015.epub https://www.redalyc.org/journal/449/44965786015/movil 10.15517/RBT.V67I3.32053 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.67 |
| format | Artículo científico |
| id | redalyc_44965786015 |
| institution | Redalyc |
| language | en |
| publishDate | 2019 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Genetic parameters of growth, and resistance to the shoot borer, in young clones of the tree Cedrela odorata (Meliaceae) Salvador Sampayo-Maldonado Biología shoot borer genetic gain heritability Cedrela odorata insect resistance Genetic parameters of growth, and resistance to the shoot borer, in young clones of the tree Cedrela odorata (Meliaceae) Salvador Sampayo-Maldonado Javier López-Upton Vicente Sánchez-Monsalvo Marcos Jiménez-Casas Biología shoot borer genetic gain heritability Cedrela odorata insect resistance Damage by Hypsipyla grandella Zeller restricts the success of plantations of Cedrela odorata. The most critical and vulnerable infection period by H. grandella is during the first three years. The aim was to estimate the expected genetic gain for the selection of clones of fast growth and resistant to the attack by this insect. A trial with 40 clones produced by grafting was planted in Veracruz, Mexico. Heritability, genetic correlations and genetic gain of clones were estimated with data at two years-old. The survival rate of the trial was of 97 % (466 living ramets in total), 2.84 m in total high and 2.32 cm of average normal diameter. Aditionally, 9.9 % of the ramets did not present attacks, indication of evasion, and 0.6 percent without response to attack. With response to attack 89.5 % of the ramets (several degrees of tolerance): 29 % with a single shoot, 14.2 % with several shoots and 46.3 % with a dominant shoot of several shoots formed. The clonal heritability of normal diameter, height, volume, stem taper index, number of attacks and response to the attack was H2c = 0.81, 0.80, 0.81, 0.61, 0.34, and 0.26. The genetic correlations between height, diameter and volume were ≥ 0.95, and the correlation of the volume with the incidence and the response to the attack was rg = -0.31 and rg = 0.62, that is a decrease in number of attacks and moderate increase in tolerance. With a selection intensity of 10 %, selecting the four clones with higher volume will produce a genetic gain of 82 % for volume, a decrease of 10.9 % of number of attacks and 6.3 % of better recovery from damage; this is more tolerance to the insect attack. The genetic gain justifies the use of the best clones in commercial plantations in Veracruz, Mexico. 2019 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44965786015 https://www.redalyc.org/journal/449/44965786015/ https://www.redalyc.org/journal/449/44965786015/html/ https://www.redalyc.org/journal/449/44965786015/44965786015.epub https://www.redalyc.org/journal/449/44965786015/movil 10.15517/RBT.V67I3.32053 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.67 |
| title | Genetic parameters of growth, and resistance to the shoot borer, in young clones of the tree Cedrela odorata (Meliaceae) |
| topic | Biología shoot borer genetic gain heritability Cedrela odorata insect resistance |
| url | https://www.redalyc.org/articulo.oa?id=44965786015 https://www.redalyc.org/journal/449/44965786015/ https://www.redalyc.org/journal/449/44965786015/html/ https://www.redalyc.org/journal/449/44965786015/44965786015.epub https://www.redalyc.org/journal/449/44965786015/movil |