4 research outputs found
Morphological Variability of Detarium microcarpum Guill. & Perr. (Caesalpiniaceae) in Benin, West Africa
No full textAims: The present study aims to evaluate the morphological diversity of Detarium microcarpum populations in Benin for the conservation purpose.
Methodology: Twelve quantitative and two qualitative variables were used in the phenotypic diversity based on the phytodistrict and soils groups of 78 D. microcarpum trees sampled in six phytodistrict of Benin. In order to access the phenotypic variability of the trees, the morphological variables were subjected to ANOVA one-way. Hierarchical ascending classification was also performed to group D. microcarpum populations based on the degree of similarity.
Results: Results showed that the leaves and fruits of D. microcarpum trees were highly polymorphic. The phytodistrict and soil group significantly influence the variability of the morphological descriptors used. Three morphotypes were obtained from D. microcarpum population used, with an important inter-groups variability for the descriptors.
Conclusion: The phenotypic variability observed suggested a fairly large genetic diversity of Detarium microcarpum. Trees belonging to subpopulation I (trees from Bassila and North Borgou phytodistricts) had the best fruit characteristics and could be used for varietal selection in Benin
Impacts des usages traditionnels sur la vulnérabilité de <i>Detarium microcarpum</i> Guill. & Perr. (Caesalpiniaceae) dans le district phytogéographique Zou au Bénin (en Afrique de l’Ouest)
No full textMorphological Diversity and Phytogeographic Patterns of Chrysophyllum albidum (Sapotaceae) in Benin
No full textChrysophyllum albidum is an agroforestry tree that provides enormous goods and services to local populations in West Africa. The unbridled use of organs the specy, causes its vulnerability, even its disappearance in certain regions, in Benin. The present study aims to evaluate the morphological diversity of populations of C. albidum in Benin, in order to differentiate individuals of the specy and target interesting morphotypes for its conservation. Nine (9) variables were used to evaluation of the phenotypic diversity of sixty (60) fruiting trees of the specy, selected in four (04) phytodistricts of Benin. To determine the inter and intra-population variability of the specy, the descriptive statistic was carried out on the quantitative morphology variables of trees by population, and for all populations. The recorded morphological variables were subjected to ANOVA to test the variability of morphological descriptors within phytodistricts and between soil type levels. An Ascending Hierarchical Classification was performed to identify the different morphotypes of the specy. The results obtained reveal significant variability in certain morphological descriptors used, depending on the phytodistricts and soil groups. We observe depending on soil types, seven significant morphological descriptors, with a significance rate of 77.78% (higher) compared to five significant morphological descriptors for the phytodistricts, with a significance rate of 55.56% (lower). So, in Benin, soil types discriminate C. albidum, much more than phytodistricts. The descriptors based on the fruits and the leaves of trees of the specy are more discriminants than those the trunk and crown. Three (03) morphotypes of C. albidum were obtained in Benin. Chrysophyllum albidum’s plants of the phytodistricts Coastal and Plateau belong to the same phenotypic class while the trees of the phytodistricts Pobè and Valley of Ouémé each have a morphotype of the specy. Consisting of relatively short trees bearing longer and wider leaves and fruits, the morphotype of C. albidum from the phytodistrict Valley of Ouémé is better indicated for future selections. These various data found must be further supplemented by the molecular genetics characterization, for confirm genetic diversity of the species and support its reproduction programs
Agro-morphological characterization of pigeonpea (Cajanus cajan L. Millspaugh) landraces grown in Benin: Implications for breeding and conservation
No full textPigeonpea (Cajanus cajan L. Millspaugh) is a neglected and under-utilized crop consumed in several
regions of word. In order to assess performance of pigeonpea landraces grown in Benin for useful
breeding programs, 50 accessions were collected from 39 villages. These accessions were
characterized by using 12 qualitative and 11 quantitative traits. Based on the seeds morphological
characteristics, the 50 accessions were grouped in 12 morphotypes. However, 8 morphological classes
were obtained with cluster analysis based on the unweighted pair group method with arithmetic
average method using qualitative traits, whereas in principal component analysis only 5 clusters have
been obtained using quantitative traits. The association/correlation among quantitative characters
showed that grain yield was negatively correlated with pod width, days to 50% flowering and
physiological maturity while it was positively correlated with pod length, pods per plant, branches per
plant and number of seeds per pod. Based on four quantitative traits (number of pods per plant, number
of seeds per pod, 100 seed weight, and early maturity), the 23 accessions from cluster 3 of whom kk5
(Ekloui), kk8 (Nontchiovi kloui), kk15 (Otili founfoun), kk18 (Klouékoun wéwé), kk22 (Otili), kk23 (CA
monlikoun) and kk28 (Hounkoun wéwé) have been recommended as good sources of germplasm for
improving the pigeonpea productivity. Further characterization using molecular techniques as well as
conservation attention should be conducted to confirm the present result and maintain the germplasm
for future breeding programs
