Morphometric characterisation of<i>Scutellonema bradys</i>populations from the Guinea Savanna and Transitional Rain Forest ecological zones of Ghana

Nyaku, Seloame T.; Jamani, Y.S.A; Cornelius, E. W.; Lutuf, Hanif

doi:10.1080/02571862.2017.1354404

Cited by 1 publication

(8 citation statements)

References 12 publications

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“…Several previous studies on morphological characterization of S. bradys also showed these differences. These include the studies by Humphreys-Pereira et al [14] then Nyaku et al [1] which were conducted on S. bradys populations associated with yam in Costa Rica and Ghana, respectively. Furthermore, principal component analysis associated with the agglomerative hierarchical clustering of morphometric variables revealed three distinct morphological groups within each S. bradys female and male population.…”

Section: Discussionmentioning

confidence: 99%

“…The canonical discriminant analysis, however, did not permit to separate male populations of S. bradys per region [14]. Nyaku et al [1], however, did not note any morphometric variability between S. bradys populations originating from the different agroecological zones of yam production in Ghana, using the agglomerative hierarchical clustering.…”

Section: Introductionmentioning

confidence: 94%

“…Principal component analysis (PCA) followed by agglomerative hierarchical clustering (AHC) was performed with eight and seven morphometric variables in females and males respectively to identify morphological groups within S. bradys populations [1]. Morphometric variables analyzed for female were L, Lrd, D 50 , Hd, Td and "a", "b" and "s'" ratios.…”

Section: Identification Of Morphological Groups By Principal Component Analysis and Agglomerative Hierarchical Clusteringmentioning

confidence: 99%

“…The Pearson correlation coefficient r was determined in order to know the relationship between eight and seven morphometric variables in S. bradys females and males, respectively [1].…”

Section: Determination Of Correlations Between Morphometric Variablesmentioning

confidence: 99%

“…Yam (Dioscorea spp.) is one of the most important staple foods of populations in the Western and Eastern Africa regions, the Caribbean and Asia-Pacific, where it is widely cultivated [1]. Yam is cultivated for its starchy tubers.…”

Section: Introductionmentioning

confidence: 99%

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

Kouakou

Kra

Yeyeh

et al. 2021

JABB

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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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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Section: Identification Of Morphological Groups By Principal Component Analysis and Agglomerative Hierarchical Clusteringmentioning

confidence: 99%

“…The Pearson correlation coefficient r was determined in order to know the relationship between eight and seven morphometric variables in S. bradys females and males, respectively [1].…”

Section: Determination Of Correlations Between Morphometric Variablesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Kouakou

Kra

Yeyeh

et al. 2021

JABB

View full text Add to dashboard Cite

show abstract

Morphometric characterisation ofScutellonema bradyspopulations from the Guinea Savanna and Transitional Rain Forest ecological zones of Ghana

Cited by 1 publication

References 12 publications

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

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

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