Durability of field resistance to black pod disease of cacao in Papua New Guinea
Black pod disease of cacao, caused by various species of Phytophthora, is one of the most serious causes of cacao yield losses worldwide. In Papua New Guinea, such losses on local smallholdings are estimated at more than 40% of annual production. Genetic improvement of cacao resistance is the most promising way of reducing the impact of these pathogens. Field infection of 25 selected Trinitario x Upper Amazonian hybrid progenies in a factorial design (5 by 5) was monitored for five consecutive years at the Cocoa and Coconut Research Institute in Papua New Guinea. The resistance durability of the various hybrids was analyzed using a factorial split-plot model with years as the main factor. The reaction of the hybrid progenies remained stable and similar throughout the 5 years. Similarly, the general combining ability ranking of the parents was also the same for each year. Moreover, data accumulated over several years provided a clearer distinction between the parents. The analyses clearly showed female inheritance under field conditions, and the progenies from what are believed to be resistant females showed good resistance.
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Subjects: | F30 - Génétique et amélioration des plantes, H20 - Maladies des plantes, U10 - Informatique, mathématiques et statistiques, Theobroma cacao, Phytophthora, résistance aux maladies, héritabilité, aptitude à la combinaison, méthode statistique, http://aims.fao.org/aos/agrovoc/c_7713, http://aims.fao.org/aos/agrovoc/c_5844, http://aims.fao.org/aos/agrovoc/c_2328, http://aims.fao.org/aos/agrovoc/c_3570, http://aims.fao.org/aos/agrovoc/c_15954, http://aims.fao.org/aos/agrovoc/c_7377, |
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dig-cirad-fr-5168812024-01-28T11:57:31Z http://agritrop.cirad.fr/516881/ http://agritrop.cirad.fr/516881/ Durability of field resistance to black pod disease of cacao in Papua New Guinea. Saul-Maora J., Namaliu Yak, Cilas Christian, Blaha Georges. 2003. Plant Disease, 87 (12) : 1423-1425.https://doi.org/10.1094/PDIS.2003.87.12.1423 <https://doi.org/10.1094/PDIS.2003.87.12.1423> Durability of field resistance to black pod disease of cacao in Papua New Guinea Saul-Maora, J. Namaliu, Yak Cilas, Christian Blaha, Georges eng 2003 Plant Disease F30 - Génétique et amélioration des plantes H20 - Maladies des plantes U10 - Informatique, mathématiques et statistiques Theobroma cacao Phytophthora résistance aux maladies héritabilité aptitude à la combinaison méthode statistique http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_15954 http://aims.fao.org/aos/agrovoc/c_7377 Black pod disease of cacao, caused by various species of Phytophthora, is one of the most serious causes of cacao yield losses worldwide. In Papua New Guinea, such losses on local smallholdings are estimated at more than 40% of annual production. Genetic improvement of cacao resistance is the most promising way of reducing the impact of these pathogens. Field infection of 25 selected Trinitario x Upper Amazonian hybrid progenies in a factorial design (5 by 5) was monitored for five consecutive years at the Cocoa and Coconut Research Institute in Papua New Guinea. The resistance durability of the various hybrids was analyzed using a factorial split-plot model with years as the main factor. The reaction of the hybrid progenies remained stable and similar throughout the 5 years. Similarly, the general combining ability ranking of the parents was also the same for each year. Moreover, data accumulated over several years provided a clearer distinction between the parents. The analyses clearly showed female inheritance under field conditions, and the progenies from what are believed to be resistant females showed good resistance. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/516881/1/516881.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1094/PDIS.2003.87.12.1423 10.1094/PDIS.2003.87.12.1423 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=178948 info:eu-repo/semantics/altIdentifier/doi/10.1094/PDIS.2003.87.12.1423 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1094/PDIS.2003.87.12.1423 |
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F30 - Génétique et amélioration des plantes H20 - Maladies des plantes U10 - Informatique, mathématiques et statistiques Theobroma cacao Phytophthora résistance aux maladies héritabilité aptitude à la combinaison méthode statistique http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_15954 http://aims.fao.org/aos/agrovoc/c_7377 F30 - Génétique et amélioration des plantes H20 - Maladies des plantes U10 - Informatique, mathématiques et statistiques Theobroma cacao Phytophthora résistance aux maladies héritabilité aptitude à la combinaison méthode statistique http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_15954 http://aims.fao.org/aos/agrovoc/c_7377 |
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F30 - Génétique et amélioration des plantes H20 - Maladies des plantes U10 - Informatique, mathématiques et statistiques Theobroma cacao Phytophthora résistance aux maladies héritabilité aptitude à la combinaison méthode statistique http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_15954 http://aims.fao.org/aos/agrovoc/c_7377 F30 - Génétique et amélioration des plantes H20 - Maladies des plantes U10 - Informatique, mathématiques et statistiques Theobroma cacao Phytophthora résistance aux maladies héritabilité aptitude à la combinaison méthode statistique http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_15954 http://aims.fao.org/aos/agrovoc/c_7377 Saul-Maora, J. Namaliu, Yak Cilas, Christian Blaha, Georges Durability of field resistance to black pod disease of cacao in Papua New Guinea |
description |
Black pod disease of cacao, caused by various species of Phytophthora, is one of the most serious causes of cacao yield losses worldwide. In Papua New Guinea, such losses on local smallholdings are estimated at more than 40% of annual production. Genetic improvement of cacao resistance is the most promising way of reducing the impact of these pathogens. Field infection of 25 selected Trinitario x Upper Amazonian hybrid progenies in a factorial design (5 by 5) was monitored for five consecutive years at the Cocoa and Coconut Research Institute in Papua New Guinea. The resistance durability of the various hybrids was analyzed using a factorial split-plot model with years as the main factor. The reaction of the hybrid progenies remained stable and similar throughout the 5 years. Similarly, the general combining ability ranking of the parents was also the same for each year. Moreover, data accumulated over several years provided a clearer distinction between the parents. The analyses clearly showed female inheritance under field conditions, and the progenies from what are believed to be resistant females showed good resistance. |
format |
article |
topic_facet |
F30 - Génétique et amélioration des plantes H20 - Maladies des plantes U10 - Informatique, mathématiques et statistiques Theobroma cacao Phytophthora résistance aux maladies héritabilité aptitude à la combinaison méthode statistique http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_5844 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_3570 http://aims.fao.org/aos/agrovoc/c_15954 http://aims.fao.org/aos/agrovoc/c_7377 |
author |
Saul-Maora, J. Namaliu, Yak Cilas, Christian Blaha, Georges |
author_facet |
Saul-Maora, J. Namaliu, Yak Cilas, Christian Blaha, Georges |
author_sort |
Saul-Maora, J. |
title |
Durability of field resistance to black pod disease of cacao in Papua New Guinea |
title_short |
Durability of field resistance to black pod disease of cacao in Papua New Guinea |
title_full |
Durability of field resistance to black pod disease of cacao in Papua New Guinea |
title_fullStr |
Durability of field resistance to black pod disease of cacao in Papua New Guinea |
title_full_unstemmed |
Durability of field resistance to black pod disease of cacao in Papua New Guinea |
title_sort |
durability of field resistance to black pod disease of cacao in papua new guinea |
url |
http://agritrop.cirad.fr/516881/ http://agritrop.cirad.fr/516881/1/516881.pdf |
work_keys_str_mv |
AT saulmaoraj durabilityoffieldresistancetoblackpoddiseaseofcacaoinpapuanewguinea AT namaliuyak durabilityoffieldresistancetoblackpoddiseaseofcacaoinpapuanewguinea AT cilaschristian durabilityoffieldresistancetoblackpoddiseaseofcacaoinpapuanewguinea AT blahageorges durabilityoffieldresistancetoblackpoddiseaseofcacaoinpapuanewguinea |
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1792495706795147264 |