The seed germination test is generally used to assess the seeds germination quality. The objective of this study was to determine the germination kinetics as well as the diversity of pepper accessions (Capsicum annuum L.) from the Diffa, region of Niger according to the germination potential. These accessions were collected in 5 Departments of the Diffa region in 2020 and 2022. Thus, the emergence of the seedlings was carried out in vitro according to a device in complete randomized blocks with three (3) repetitions. The analysis of variance (ANOVA) showed a significant difference between the accessions, for all the parameters analyzed (P˂0.000). The average germination rate which varied from 7.33% for N’guigmi (Ng-047) to 100% for Bosso accessions. Strong correlations were observed between germination rate and germination rate (0.63). The ascending hierarchical classification (HAC) and the principal component analysis (PCA) revealed a structuring of the accessions into 3 main distinct groups. The G1 group composed of 27 accessions is characterized by a long germination time and a germination time of 50% and by a high germination rate. Group G2 is made up of 10 accessions with a long latency time and 50% germination time. As for the G3 group, it is also made up of 10 accessions with a high germination time and latency time. This study will allow breeders to have a biological base material for further research.

The Voandzou [Vigna subterranea (L.) Verdc], is generally cultivated in sub-Saharan Africa, where its production ranks third in seed legumes. The valorization of this crop is therefore one of the best alternatives to ensure the food security of the population in the face of declining production of food crops such as millet and sorghum in a country like Niger. Indeed, the control of the diversity of the voandzou will undoubtedly allow it to be taken into account in the varietal selection programs. The objective of this study is the agro-morphological characterization of thirty (30) accessions from the Nigerian Voandzou collection in the Sudanese agro-climatic zone. The data used are collected through an agronomic test set up on a Fisher device in complete random blocks, with three (3) repetitions. Sixteen (16) characters, including four phenological, six (6) morphological, and six (6) traits related to yield components were evaluated for characterization of accessions. The descriptive statistics analysis showed that the coefficients of variation ranged from 4.16% (maturity date) to 72.51% (shell weight). Significantly high values ​​ (CV> 20%) were observed for 12 characters out of 16 analyzed. Characterization revealed very highly significant differences between 11 parameters of the accessions studied. It was found that accessions Di-017, Ma-045, Ta-095 and Ta-096 are early (86 JAS) and give more pods per plant. The Zi-007 accession is the most efficient in performance components. Strong correlations were observed between the dates of the first flowering and that of fifty percent r = 0.840. Correlations of the same order were obtained between the diameter of the plants and the height r = 0.714 and between the weight of the pods and seeds r = 0.954. In order to specify the different groups Principal Component Analysis (PCA) and Ascending Hierarchical Classification (AMP) were performed. The group G3 consists of 7 accessions, are late, more productive in biomass, give better yields, but fewer pods per plant. The G2 group consists of a single accession Zi-007, which is early, more productive in biomass, yield and gives more pods per plant. Then the group G1 consists of 22 accessions that are intermediate to those of the other two groups.