Multivariate Analysis for Morphological Characteristics of N’Dama Cattle Breed in Two Agro-ecological Zones of Côte d’Ivoire

Information on morphological characteristics is a prerequisite to sustainable breed improvement, utilization, and conservation. In this study, 108 N’Dama cattle cows from 11 farms of central and northwestern regions of Côte d’Ivoire were described using visual appreciation criteria and linear body measurements. The variables were studied using principal component analysis (PCA) and discriminant analysis. Results indicated that the most common N’Dama is fauve (83.33%) and it has straight back profile (69.44%) and lyre horn (74.07%). Agroecological zone has a significant (p˂0.01) effect on linear body measurements of N’Dama. The central region animals had higher head width (18.94 ± 2.18 cm), skull length (22.51 ± 2.18 cm), skull width (16.51 ± 1.72 cm), muzzle circumference (40.83 ± 2.58 cm), distance between horns (15 ± 1.90 cm), ear length (17.46 ± 2.57 cm), chest length (160.11 ± 15.8 cm), chest depth (71.55 ± 7.41 cm), and body length (125.13 ± 12.22cm) than those of northwestern region N’Dama. Thus, their respective values were: 15.41 ± 2.85 cm, 18.62 ± 2.6 cm, 12.44 ± 3.94 cm, 38.8 ± 2.61 cm, 13.72 ± 1.52 cm, 16.41 ± 1.61 cm, 143.84 ± 8.35 cm, 65.25 ± 4.1 cm, and 119.18 ± 12.38 cm. PCA revealed that N’Dama morphometric variability performed from the 9 variables (Lt, lt, Lc, lc, pt, hg, Pth, Lcp and Lf) were more associated with the first two factors. In regards to the discriminant analysis, these 9 variables distinguished the N’Dama significantly (p˂0.05) into two populations that corresponds with the two agroecological zones.

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Effect of Gamma Irradiation of Seeds on the Development and Productivity of Three Maize Varieties (Zea mays. L) in Côte D’ivoire

Asian Research Journal of Agriculture ◽

10.9734/arja/2021/v14i430142 ◽

2021 ◽

pp. 89-99

Author(s):

Yao Kouakou Francois Konan ◽

Ayolié Koutoua ◽

Soro Dogniméton ◽

Koné Sié Kissomanbien ◽

Kouadio Akéssé Blaise ◽

...

Keyword(s):

Zea Mays ◽

Cote D'ivoire ◽

Côte D’Ivoire ◽

Zea Mays L ◽

Descriptive Analysis ◽

Morphological Characteristics ◽

Morphological Characters ◽

Cote D’Ivoire ◽

Côte D'ivoire ◽

Maize Varieties

Climate variability has been and continues to be the main source of food fluctuations. This variability threatens the production of cash crops such as maize (Zea mays L). Maize is a cereal and has become one of the main agricultural crops in Côte d’Ivoire. The objective of this study is to determine the agro-morphological characteristics of three (03) varieties of maize (EV 8728, GMRP / 18 and MDJ) which have undergone irradiation with gamma radiation (0, 100, 200 and 300 grays) to induce mutations. The agro-morphological evaluation was carried out in a completely randomized block device. morphological characters selected from the descriptors of maize were used in this study. The descriptive analysis revealed a significant diversity between the treatments. The comparison between all the agro-morphological characters and the different treatments showed that the treatments EV8728_0 and EV8728_100 Gy had the best characteristics of ears and grains and the treatment MDJ_200 had the best vegetative characteristics.

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Diagnostic of Tomato Nematode in Daloa (Côte d’Ivoire)

International Journal of Current Microbiology and Applied Sciences ◽

10.20546/ijcmas.2021.1011.001 ◽

2021 ◽

Vol 10 (11) ◽

pp. 1-9

Author(s):

N Guettia Marie Yah Ahébé Marie Hélène Koffi ◽

François Regis Yadom Yao Kouakou N dodo Boni Clovis Koffi ◽

Hortense Taky Diallo Atta

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Morphological Characteristics ◽

Visual Observation ◽

Nematode Population ◽

Cote D’Ivoire ◽

Characteristic Roots ◽

Côte D'ivoire

Symptomatological studies were carried out in two tomato growing areas in Daloa to estimate and identify the associated nematode populations. Symptoms were assessed by visual observation. The soil and root nematodes were extracted by Bermann's method and identified by observing morphological characteristics. The symptomatological study showed the presence of symptoms of plants wilting, yellowing of the leaves as well as galls on the nematodes characteristic roots. The results also highlighted diversity within the nematode population that colonizes tomato in Daloa with four genera of nematodes. The genera Tylenchus, Helicotylenchus, Partylenchus and Meloidogyne were identified. The presence of the genus Meloidogyne in all plots shows that it is responsible for the yellowing symptoms associated with root galls. These nematodes are known for their action on the formation of galls on the roots of the tomato.

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Morphological Characteristics of Scutellonema bradys Populations Responsible for Yam Dry Rot in Côte d’Ivoire

Journal of Advances in Biology & Biotechnology ◽

10.9734/jabb/2021/v24i230201 ◽

2021 ◽

pp. 43-59

Author(s):

Yadom Y. F. R. Kouakou ◽

Kouamé Daniel Kra ◽

Toualy Marie Noël Yeyeh ◽

Hortense Atta Diallo

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Morphological Variability ◽

Morphological Characteristics ◽

Principal Component ◽

Morphological Characterization ◽

Food Markets ◽

Dry Rot ◽

Cote D’Ivoire ◽

Côte D'ivoire

The great diversity of agroecological factors that cover the yam production area in Côte d’Ivoire can be a source of morphological variability within Scutellonema bradys species, responsible for yam dry rot. This study aims at identifying the morphological group(s) of S. bradys which infect(s) yam Dioscorea cayenensis-rotundata. Two hundred ten yam tubers for sale in food markets in the Autonomous District of Abidjan were sampled from traders. After extraction and identification, a morphological characterization was carried out on S. bradys populations using morphological descriptors. Yam tubers sampled from food markets came from three agroecological zones namely dry tropical savannah, semi-deciduous dense forest and transitional forest areas. Morphometric variables and ratios used individually did not help identify morphological groups. Principal component analysis, however, performed with the most discriminating variables and ratios revealed three morphological groups named "large", "medium" and "small" in males and females and confirmed by the agglomerative hierarchical clustering. Each group consisted of a rate greater than 48% of individuals from a given agroecological zone. Three morphological groups of S. bradys are associated with yam dry rot in Côte d’Ivoire. Pathogenic and molecular characterization of the morphological groups would be necessary with a view to researching control methods.

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