[ Caractérisation agromorphologique des accessions de sésame (Sesamum indicum L.) collectées au Niger ]
Volume 29, Issue 4, July 2020, Pages 902–914
Zangui Hamissou1, Amoukou Adamou Ibrahim2, Boureima Seyni3, and Amadou Mounkaila Hamissou4
1 Faculty of Agronomy, Abdou Moumouni University, BP 10960 Niamey, Niger
2 Faculty of Agronomy, Abdou Moumouni University, BP 10960 Niamey, Niger
3 Faculté d’Agronomie et des Sciences de l’Environnement, Université Dan Dicko Dankoulodo de Maradi, BP 465 Maradi, Niger
4 Faculty of Agronomy, Abdou Moumouni University, BP 10960 Niamey, Niger
Original language: French
Copyright © 2020 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
140 sesame accessions (Sesamum indicum) collected in different regions of Niger were characterized through 16 agro-morphological characters. These characters showed a great diversity within this collection. However, no link has been highlighted between this diversity and the geographical isolation of the collected accessions. The principal component analysis (PCA) and the hierarchical classification on the principal components (HCPC) highlighted three agromorphological groups. The group 1 accessions are the earliest and with a low vegetative development but very productive. Those of group 2 have an average precociousness and a vegetative development but as productive as those of group 1. Group 3 is that of the late ones with a very important vegetative development but low yields. The early rain cessation in September, before the end of their cycle, certainly impacted their productivity. The most discriminating variables that describe the variability between the identified groups are the precocity characters (date of start of flowering, date of 50% flowering, date of start of flower buds and physiological maturity) and vegetation characters (number of branches on the main stem, number of nodes on the main stem and length of internodes). Some accessions, with good agronomic performance, have been identified to be multiplied and distributed directly to producers or to integrate future sesame selection programs in Niger.
Author Keywords: Sesamum indicum, agromorphological characterization, diversity, Niger.
Volume 29, Issue 4, July 2020, Pages 902–914
Zangui Hamissou1, Amoukou Adamou Ibrahim2, Boureima Seyni3, and Amadou Mounkaila Hamissou4
1 Faculty of Agronomy, Abdou Moumouni University, BP 10960 Niamey, Niger
2 Faculty of Agronomy, Abdou Moumouni University, BP 10960 Niamey, Niger
3 Faculté d’Agronomie et des Sciences de l’Environnement, Université Dan Dicko Dankoulodo de Maradi, BP 465 Maradi, Niger
4 Faculty of Agronomy, Abdou Moumouni University, BP 10960 Niamey, Niger
Original language: French
Copyright © 2020 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
140 sesame accessions (Sesamum indicum) collected in different regions of Niger were characterized through 16 agro-morphological characters. These characters showed a great diversity within this collection. However, no link has been highlighted between this diversity and the geographical isolation of the collected accessions. The principal component analysis (PCA) and the hierarchical classification on the principal components (HCPC) highlighted three agromorphological groups. The group 1 accessions are the earliest and with a low vegetative development but very productive. Those of group 2 have an average precociousness and a vegetative development but as productive as those of group 1. Group 3 is that of the late ones with a very important vegetative development but low yields. The early rain cessation in September, before the end of their cycle, certainly impacted their productivity. The most discriminating variables that describe the variability between the identified groups are the precocity characters (date of start of flowering, date of 50% flowering, date of start of flower buds and physiological maturity) and vegetation characters (number of branches on the main stem, number of nodes on the main stem and length of internodes). Some accessions, with good agronomic performance, have been identified to be multiplied and distributed directly to producers or to integrate future sesame selection programs in Niger.
Author Keywords: Sesamum indicum, agromorphological characterization, diversity, Niger.
Abstract: (french)
140 accessions de sésame (Sesamum indicum) collectées dans différentes régions du Niger ont été caractérisées à travers 16 caractères agro morphologiques. Ces caractères ont montré une grande diversité au sein de cette collection. Toutefois, il n’est pas mis en évidence un lien entre cette diversité et l’isolement géographique des accessions collectées. L’analyse en composantes principales (ACP) et la classification hiérarchique sur les composantes principales (HCPC) ont mis en évidence trois groupes agromorphologiques. Les accessions du groupe1 ont sont les plus précoces et avec un faible développement végétatif mais très productives. Celles du groupe 2 ont une précocité et un développement végétatif moyens mais aussi productif que celles du groupe 1. Le groupe 3 est celui des tardifs avec un développement végétatif très important mais des rendements faibles. L’arrêt précoce des précipitations en septembre, avant la fin de leur cycle, a certainement impacté leur productivité. Les variables les plus discriminantes qui permettent de décrire la variabilité entre les groupes identifiés sont les caractères de précocité (date de début de floraison, date de 50% floraison, date de début de boutons floraux et la maturité physiologique) et les caractères de végétation (nombre de rameaux sur la tige principale, nombre de nœuds sur la tige principale et longueur des entre-nœuds). Certaines accessions ayant de bonnes performances agronomiques ont été identifiées pour être multipliées et distribuées directement aux producteurs ou bien pour intégrer de futurs programmes de sélection de sésame au Niger.
Author Keywords: Sesamum indicum, caractérisation agromorphologiques, diversité, Niger.
How to Cite this Article
Zangui Hamissou, Amoukou Adamou Ibrahim, Boureima Seyni, and Amadou Mounkaila Hamissou, “Agromorphological characterization of sesame accessions (Sesamum indicum L.) collected in Niger,” International Journal of Innovation and Applied Studies, vol. 29, no. 4, pp. 902–914, July 2020.
