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Agro Morphological Characterization and Evaluation of Three Okra [Abelmoschus esculentus (L.) Moench] Varieties from Zinder (Niger) for Yield and Other Variability Components

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Agricultural Sciences 2022年第3期13卷 321-329页

作者： Rabiou Abdou Oumarou Zango Abdoul Karim Toudou Timothée Kouassi Agbo So yacoubou bakasso Department of Biology Faculty of Sciences and Techniques Université de Zinder Zinder Niger Department of Biology Faculty of Sciences and Techniques Université Abdou-Moumouni Niamey Niger

Okra, (Abelmoschus esculentus (L.) Moench), is grown as a sole crop and as a field crop in Niger. In the present study, three okra varieties from Zinder region in Niger Republic have been assessed for their agronomic performance traits. The experiment was conducted in a randomized complete block design with three replications during the dry season 2018-2019. The following characters were evaluated: emergence;germination;boutonization flowering;fructificaion;height at flowering;height at maturity;length of the petiole;diameter of leaves;diameter of plants;number of fruits;number of fruit per branch;total number of fruits;number of branch, number of leaves;length of fruits;diameter of fruits;number of arrets;weight of fruits;weight of seed, number of seeds. The collected data were subjected to analysis of variance (ANOVA) using XlStat version 7.1 and the means separated by using Turkey’s Method. Analysis of Principal components (PCA) using R software was also performed on the variables. There were significant differences for all characters except emergence, germination, diameter of plants, number of fruits, total number of fruits and diameter of fruits. The multivariate analysis by the ACP showed a grouping of the varieties in three groups. The three okra varieties have revealed good performances and could be useful for a breeding program. The study of the water needs of the varieties will be very interesting to make a better selection of the collection.

关键词： Agronomic Performance Okra Abelmoschus esculentus (L.) Moench Multivariate Analysis Niger Republic

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Agro-Morphological Variability in Eight Bambara Groundnut (Vigna subterranea (L.) Verdc.) Morphotypes from Zinder (Niger)

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Agricultural Sciences 2023年第1期14卷 1-10页

作者： Oumarou Zango Rabiou Abdou Saley Adamou Salamatou Agbo So Timothée Kouassi bakasso yacoubou Département de Biologie Faculté des Sciences et Techniques Université André Salifou de Zinder Zinder Niger Laboratoire de Gestion et Valorisation de la Biodiversité au Sahel Département de Biologie Faculté des Sciences et Techniques Université Abdou Moumouni Niamey Niger

Bambara groundnut (Vigna subterranea (L.) Verdc.) has economic importance for the producers and the traders as cash crop since it generates substantial income for households in Niger. The objective of this study was to assess eight (8) Bambara groundnut morphotype from Université André Salifou de Zinder in Niger Republic by their morphological and agronomic characters. The experiment was conducted in a randomized complete block design with three replications during the rainy season of 2020-2021. Data were collected on the Number of leaves, Plant height (cm), Growth habit (cm), Terminal leaflet length, Terminal leaflet width, Number of nodes/stem, Number of stems/plant, Number of pods/plant, Weight of 100 pods (g), Weight of 100 seeds (g), Length of seeds (mm), Width of seeds (mm), Weight of seeds/Plot (kg). There were significant differences for all characters, except Number of leaves, Terminal leaflet length, Terminal leaflet width, Length of seeds (mm) Weight of 100 pods (g), Weight of 100 seeds (g). The morphotypes UZ-VZ-04, UZ-VZ-03, UZ-VZ-06, UZ-VZ-02 and UZ-VZ-05 have demonstrated good performance for grain weight per plot and can be useful for a breeding program.

关键词： Vigna subterranea Accessions Agro-Morphological Traits Weight of 100 Seeds

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Local Practices and Knowledge Associated with Date Palm Cultivation in Southeastern Niger

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Agricultural Sciences 2016年第9期7卷 586-603页

作者： Oumarou Zango Hervé Rey yacoubou bakasso René Lecoustre Frédérique Aberlenc Jean-Christophe Pintaud UMR AMAP CIRAD Montpellier France Faculty of Sciences and Technologies University of Niamey Niamey Niger Montpellier University Montpellier France F2F-Palms Group UMR DIADE IRD Montpellier France

The date palm (Phoenix dactylifera L.), a dioecious species, is of particular interest in the Sahel due to its phenological plasticity in relation to climate change and its double-flowering capacity. This article explores local practices and knowledge associated with date palm cultivation in the oasis basins of southeastern Niger, and provides an inventory of local seed propagated varieties, for more effectively guiding agricultural research and the breeding of this species. We carried out a survey of 30 date palm growers in 14 villages of the Manga region. The qualitative data of the survey were processed by a Multiple Correspondence Analysis. We inventoried 19 date palm varieties, for which the main distinctive criterion was fruit colour, but some other criteria such as biology or provenance were also used. The cultural practices and knowledge associated with the date palm in Manga have improved since the 1990s. They also depend on ethnic groups and the importance they assign to farming compared to livestock rearing and trading activities. The type of basin (high, intermediate, or low water table) influences growers’ practices and perceptions. Lastly, the date harvest in the wet season is abundant, but of mediocre quality, whereas it is the opposite for the dry season harvest. To conclude, sustainable development of date palm cultivation in the Sahel zone relies firstly on the selection of varieties that are early fruit producers or that can complete fruit maturation during the raining season and secondly on technical capacity building for producers.

关键词： Sahel Phoenix dactylifera Seed Propagated Variety Local Knowledge Climate Change

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Climate Variability in Niger： Potential Impacts on Vegetation Distribution and Productivity

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Journal of Environmental Science and Engineering(A) 2012年第1期1卷 49-57页

作者： Ali Mahamane Boube Morou MaYnassara Zaman-Alia Mahamane Saadou Karim Saley yacoubou bakasso Issoufou Sama Wata Abdoulaye Amadou Oumani Sandrine Jauffret Department of Biology Faculty of SciencesUniversityA．MoumouniUAMNiamey10662Niger Faculty of Sconces University of MaradiMaracB465Niger National Center of Ecological and Environmental Surveillance CNSEE Ministry of Hydraulics the Environment and Fight Against the DesertificationNiamey 11874Niger NARGES Nature．Resources and Global Environmental Surveillance．Le Coulet Pred Engauri 04200 Les Omergues France

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Viral Hepatitis B and C: Epidemiological, Clinical and Paraclinical Aspects in the Internal Medicine Department of KARA University Hospital in Togo

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Open Journal of Internal Medicine 2024年第1期14卷 131-139页

作者： Lihanimpo Djalogue Mossi Komi Edem El Hadj yacoubou Tchamdja Toyi Djagadou Kodjo Agbeko Balaka Abago Djibril Mohaman Awalou Internal Medicine Department University of Kara Kara Togo Internal Medicine Department University of Lome Lome Togo Hepato-Gastroenterology Department University of Kara Lomé Togo

Introduction: Viral hepatitis B and C constitute real public health problems worldwide. The objective of this work was to describe the epidemiological, clinical and paraclinical aspects of viral hepatitis B and c in the internal medicine department of Kara University Hospital. Method: this was a retrospective descriptive study carried out in the Internal Medicine department of Kara University Hospital, over a period of 3 years from March 2020 to April 2023. It included all patients seen in consultation or hospitalized for hepatitis viral B and/or C. Results: A total of 57 patients were included in our study. The average age was 44.30 years ± 16.75 and the M/F sex ratio was 1.38. Married people were in the majority 63.2%. The circumstances of the discovery of viral hepatitis B and C were dominated by abdominal pain in 35.1% of cases and hepatomegaly in 29.8% of cases and in 33.3% of cases, it was during screening voluntary. Patients with viral hepatitis B only accounted for 64.9% of cases;those with only viral hepatitis C represented 31.6% of cases and 3.5% of cases had HVB/HCV co-infection. We recorded 36.8% complications including 52.4% liver cirrhosis and 47.6% hepatocellular carcinomas. During the evolution, there were 03 deaths. Conclusion: the prevalence of hepatitis B and C virus carriage in patients followed in internal medicine at Kara University Hospital is high. It is therefore essential to put in place treatment and prevention strategies against these viruses.

关键词： Hepatitis B Hepatitis C Internal Medicine Kara University Hospital

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Tuberculosis in the Carcinal Environment in Chad Due to the Mycobacterium Tuberculosis Circulante Complex

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Journal of Biosciences and Medicines 2024年第2期12卷 214-224页

作者： Ahmat Idriss Ahmat Mahamat Tahir Ngaré Hassan Ngandolo Bongo Nare Richard Mahamat Adanao Adoudou Mbah Ntepe Leonel Javeres Hamidou yacoubou Ali Mahamat Moussa Laboratory for Diagnostic Research and Scientific Expertise University of N’Djamena N’Djamena Chad Veterinary and Zootechnical Research Laboratory of Farcha N’Djamena Livestock and Development Research Institute N’Djamena Chad Institute of Medical Research and Medicinal Plant Studies (IMPM) Ministry of Scientific Research and Innovation Yaoundé Cameroon Cameroon Ministry of Public Health Yaoundé Cameroon Faculty of Human Health Sciences University of N’Djamena N’Djamena Chad

Tuberculosis (TB) is a serious infectious disease and its control is considered a challenge, particularly among vulnerable populations such as prisoners. The prevalence of TB in prisons is an alarming public health problem in many countries. The aim of this study is to describe the epidemiology of tuberculosis and the strategies for controlling this disease in the Chadian prison population. During the course of our study, the prevalence of tuberculosis in prisons was 9.64%. The age group between 55 years and over (43.33%) was the most represented in this study, and all patients were men with a frequency of 62.66%. The cross-tabulation of Culture_7H9G and Culture_7H9P showed that out of our total positive sample, we found a total of 87 positive strains and 63 negative strains. Our study shows that it is essential to know the prevalence of tuberculosis in all the country’s prisons. Indeed, this can serve as an indication of the need for action in prisons to reduce TB rates, in particular by improving the structure of prison environments, diagnosing new cases quickly and accurately, identifying drug-resistant strains and implementing effective, direct treatment observed in people with tuberculosis.

关键词： Mycobacterium Prison Tuberculosis and Chad

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Defective mitophagy and the etiopathogenesis of Alzheimer’s disease

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Translational Neurodegeneration 2022年第1期11卷 461-473页

作者： Kuan Zeng Xuan Yu yacoubou Abdoul Razak Mahaman Jian-Zhi Wang Rong Liu Yi Li Xiaochuan Wang Department of Psychiatry Wuhan Mental Health CenterWuhan 430012China Co-Innovation Center of Neurodegeneration Nantong UniversityNantong 226001China Department of Pathophysiology School of Basic MedicineKey Laboratory of Education Ministry/Hubei Province of China for Neurological DisordersTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Wuhan Hospital for Psychotherapy Wuhan 430012China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518000China.

Accumulation of impaired mitochondria and energy metabolism disorders are non-negligible features of both aging and age-related neurodegeneration,including Alzheimer’s disease(AD).A growing number of studies suggest that mitophagy disorders play an important role in AD occurrence and *** interaction between mitophagy deficits and Aβor Tau pathology may form a vicious cycle and cause neuronal damage and *** the molecular mechanism of mitophagy and its role in AD may provide insights into the etiology and mechanisms of *** mitophagy is a potential target for AD prevention and treatment.

关键词： Mitophagy Alzheimer’s disease PINK1 Tau Aβ

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Inactivation of ERK1/2-CREB Pathway Is Implicated in MK801-induced Cognitive Impairment

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Current Medical Science 2023年第1期43卷 13-21页

作者： Cui-ping GUO Wen-sheng Li Yi LIU yacoubou Abdoul Razak Mahaman Bin ZHANG Jian-zhi WANG Rong LIU Hong-lian LI Xiao-chuan WANG Xiang GAO Central Laboratory Scientific Research DepartmentRenmin Hospital of Wuhan UniversityWuhan430060China Co-innovation Center of Neuroregeneration Nantong UniversityNantong226001China Department of Pathophysiology School of Basic MedicineKey Laboratory of Education Ministry/Hubei Province of China for Neurological DisordersTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen518000China

Objective Schizophrenia(SZ)is associated with cognitive impairment,and it is known that the activity of cAMP response element binding protein(CREB)decreases in the brain of SZ *** previous study conducted by the investigators revealed that the upregulation of CREB improves the MK801-related SZ cognitive *** present study further investigates the mechanism on how CREB deficiency is associated with SZ-related cognitive *** MK-801 was used to induce SZ in *** blotting and immunofluorescence were performed to investigate CREB and the CREB-related pathway implicated in MK801 *** long-term potentiation and behavioral tests were performed to assess the synaptic plasticity and cognitive impairment,*** The phosphorylation of CREB at Ser133 decreased in the hippocampus of SZ ***,among the upstream kinases of CREB,merely ERK1/2 was downregulated,while CaMKII and PKA remained unchanged in the brain of MK801-related SZ *** inhibition of ERK1/2 by PD98059 reduced the phosphorylation of CREB-Ser133,and induced synaptic dysfunction in primary hippocampal ***,the activation of CREB attenuated the ERK1/2 inhibitor-induced synaptic and cognitive *** These present findings partially suggest that the deficiency of the ERK1/2-CREB pathway is involved in MK801-related SZ cognitive *** activation of the ERK1/2-CREB pathway may be therapeutically useful for treating SZ cognitive deficits.

关键词： schizophrenia cognitive impairments cAMP response element binding protein ERK1/2 MK801

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Urban Market-Gardening in Parakou (Republic of Benin): Spatial Dynamics, Food Security, Protection of the Environment and Creation of Employments

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Journal of Geoscience and Environment Protection 2015年第5期3卷 93-103页

作者： Abdoul-Ramane Abdoulaye Aboudou yacoubou Mama Aboudou Ramanou Département de Géographie et Aménagement du Territoire Faculté des Lettres Arts et Sciences Humaines Université de Parakou Parakou République du Bénin

Nowadays, African cities are subjected to upsets which result from the extraordinary growth of urban populations. The growth of the population of cities has induced some changes in the structure of the activity of those cities. Agriculture which was formerly confined to the countryside henceforth develops in the urban area and occupies a preponderant place as a strategy of survival, of insertion and of food supplying of the city-dwellers. It has become an activity integrated to the urban tissue through systems of occupying and exploitation of land in the urban area. Population growth (4.81%) between 2002 and 2013 is a critical poverty rate (65%) of the population of Parakou city, entailing a misery perceptible in all its social and economic dimensions. The market-gardening activity has integrated itself to the urban tissue. The objective of this study is to understand how urban agriculture through market-gardening can be a solution for rural farmers who have moved to Parakou city. In this study, documentary research, interviews and field observation are used for data collection. The main results to be signaled among others are: evolution and status of the market-gardening areas in Parakou, the reduction of food insecurity with the permanent availability in quantity and in quality of market-gardening products accessible to the population: the protection of the environment through the drainage of the urban area and the preservation of the diversity of vegetables;the increase of the income of the households of the farmers and the creation of employments.

关键词： Urban Agriculture Food Security Market-Gardening Channel Land Dynamics Protection of the Environment Employment Parakou

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The Projected Changes of Precipitations over Niger Under the Scenarios RCP 4.5 and RCP 8.5

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Journal of Environmental Science and Engineering(B) 2022年第6期11卷 248-266页

作者： Mounkaila Saley Moussa yacoubou Mahamadou Abdou Saley Inoussa Department of Physics Faculty of Sciences and TechniquesAbdou Moumouni UniversityBP:10662NiameyNiger Department of Physics Faculty of Sciences of EducationAndre Salifou UniversityBP:656ZinderNiger

The socio-economic activities of Niger rely on agriculture which is strongly affected by changes in precipitation during the rainy *** ultimate aim of this study is to assess the projected changes of precipitation over Niger under the Representative Concentration Pathways(RCP)scenarios 4.5(RCP 4.5)and RCP 8.5 using multi-RCM(Multi-Regional Climate)model *** observation data are from CHIRPS(Climate Hazards Group InfraRed Precipitation with Station)and the RCMs are from the SMHI(Swedish Meteorological and Hydrological Institute)model(RCA4)driven by ten(10)different GCMs(General Circulation Model)(e.g.,CCCma,CSIRO,ICHEC,IPSL,MIROC,MOHC-HadGEM2,MPI,NCC-NorESM1,NOOA,and NRCM)within the framework of CORDEX(Coordinated Regional Climate Downscaling Experiment)Africa *** reference and projections periods in this study are respectively 1981-2005 for the present and 2011-2100 for the near,medium and far future divided into three periods,2011 to 2040(P1),2041 to 2070(P2)and 2071 to 2100(P3).The methodology used,consists of assessing the performance of the multi-RCMs of RCA4 model(with respect of CHIRPS)in simulating the precipitations changes by computing the spatial distribution and anomalies of precipitations;and their indices of RMSE(Root Mean Square Error),the bias,SPI(Standardized Precipitation Anomaly Index),correlation coefficient,statistical t-test,spatial evolution rate and the rate of temporal *** the validation of the multi-RCMs RCA4 models,the ensemble mean of the models is used to assess the projected changes of precipitations over Niger in the *** results show that most of the multi-RCMs capture the four climatic zone except for *** the ensemble mean of the models simulates(as compared to CHIRPS)more accurately the monthly,annual precipitations anomalies and their indices than individual’s models in the reference period,some RCMs(e.g.,CSIRO-IPSL and CCCma-HadGEM)poorly reproduce *** projected changes of precip

关键词： Climate projection precipitation changes anomaly scenarios RCP Niger Sahel

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