Etude de la réaction ‘B’ chez les lignées F5 de sorgho

Registration ID: IJNRD_184872

Published ID: IJNRD2212138

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Abdourahamane ALOU HIMADOU, Issa MOUNKAILA, Soumana SOULEY

Keywords: Sorghum bicolor, line, hybrid, male-sterile.

Résumé Le Niger emblave annuellement 20,44% des superficies cultivables du territoire avec du sorgho. Le matériel végétal de cette étude est constitué de quatre cents trente-deux (432) lignées de la F5 de sorgho qui ont été développées sur le site d’exploitation de la Ferme Semencière de Base de Lossa et leurs hybrides. Les semis ont été effectués selon des écartements de 0,80 m entre les billons et 0,30 m entre les poquets et l’étude couve une superficie d’un Hectare. Toutes les plantes utilisées dans cette sélection sont des lignées B. Nous avons retenu pour les analyses 150 lignées sur les 432 semées soit environ 35% de rétention au champ des lignées initiales. Les 65% des lignées ont été rejetées au champ sur la base de la différence de la taille entre les couples des lignées ‘A’ et ‘B’. La production de semences hybrides selon les normes techniques appropriées est un élément clé de l’augmentation de la production agricole. Pour détecter des lignées potentiellement intéressantes à poursuivre avec des programmes développement d’hybrides de sorgho en hivernage 2018, nous nous sommes basés sur la taille des plantes, la longueur de la panicule et le poids de paille sèche. En outre, nous avons fixé les valeurs minimales à atteindre pour être retenue pour deux (2) variables qui illustrent le double objectif poursuivi dans ce développement d’hybride de sorgho. Il s’agit de la longueur de la panicule des plantes (≥ 26 cm), ensuite, le deuxième critère est le poids de la paille sèche produite (≥ 2.5 kg). Sur la base de ces deux critères, nous avons dressé une liste de 74 lignées qui répondent aux deux critères énumérés. Cette liste renferme non seulement des lignées de tous les cycles, mais elle prend en compte un vaste nombre des lignées de taille allant de 81 cm à 205 cm. Mots clés: Sorghum bicolor, lignée, hybride, mâle-stérile. Abstract Niger annually sows 20.44% of its cultivable area with sorghum. Plant material of this study is made up of four hundred and thirty-two (432) lines of F5 sorghum plants that were developed at Lossa’s Basic Seed Farm (FSBL) and their hybrids. Seedlings were planted at 0.80 m ridge spacing and 0.30 m cluster spacing. The study covered an area of one Hectare. All plants used in this selection are ‘B’ lines. We retained for analysis 150 lines out of the initial 432 sown, i.e. about 35% of initial lines were retained in field for selection process. Thus, 65% of lines were rejected in field on basis of difference in size between pairs of 'A' and 'B' lines. Production of hybrid seed to appropriate technical standards is a key element in increasing crop productivity. To detect potentially interesting lines to pursue with in sorghum hybrid development programs in winter 2018, we based our choices on plant height; panicle length and dry matter weight. We further set minimal size for retention purpose for two (2) criteria that illustrate dual objectives pursued in this sorghum hybrid development. Fist is panicle length of plants set at (≥ 26 cm), and 2nd criterion is dry matter weight set at (≥ 2.5 kg). Based on these two criteria, we have compiled a list of 74 lines that meet the two listed criteria. This list not only contains lines from all cycles, but also considers a large number of lines ranging in size from 81 cm to 205 cm. Keywords: Sorghum bicolor, line, hybrid, male-sterile.

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Abdourahamane ALOU HIMADOU, Issa MOUNKAILA, & Soumana SOULEY (December-2022). Etude de la réaction ‘B’ chez les lignées F5 de sorgho. INTERNATIONAL JOURNAL OF NOVEL RESEARCH AND DEVELOPMENT, 7(12), b359-b387. https://ijnrd.org/papers/IJNRD2212138.pdf

Volume 7 Issue 12, December-2022

Pages : b359-b387

Paper Reg. ID: IJNRD_184872

Published Paper Id: IJNRD2212138

Research Area: Biological Science

Author Type: Foreign Author

Country: Tillabéry, Tillabéry, Niger

Published Paper PDF: https://ijnrd.org/papers/IJNRD2212138.pdf

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