Identification of agronomically valuable species of Crotalaria based on phenetics

Raj, L. Joelri Michael; Britto, S. John

doi:10.5251/abjna.2011.2.5.840.847

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…Out of the seven qualitative characters that were studied, four of them, namely, leaf colour, stem colour, dry pod colour, and hairiness of the stem, were found to be similar among species. is observation concurred with Raj and Britto [17] and Schippers [20] who documented that C. brevidens and ochroleuca are closely related and their phenotypic information cannot be attributed to either of them.…”

Section: Discussionsupporting

confidence: 89%

“…Twenty quantitative and qualitative morphological traits were used to estimate the level of variation among the accessions based on Crotalaria descriptors adopted from Raj and Britto [17] with some slight modifications. e qualitative traits that were recorded include leaf type, leaf colour, stem colour, hairiness of stem, flower colour, dry pod colour, and seed colour.…”

Section: Data Collectionmentioning

confidence: 99%

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Agro-Morphological Characterization of Kenyan Slender Leaf (Crotalaria brevidensandC. ochroleuca) Accessions

Mwakha

Gichimu

Neondo

et al. 2020

International Journal of Agronomy

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Slender leaf (Crotalaria spp) is among the indigenous and underutilized vegetables in Kenya whose production is limited to the Western and Coastal regions of the country. For a long time, this crop has been neglected in terms of research and genetic improvement. There is therefore scanty information on its morphological diversity and agronomic performance, hence the need for this study. Field experiments were carried out for two seasons in October to December 2018 and March to May 2019. The experiments were laid out in Randomized Complete Block Design with 29 accessions and replicated three times. Both qualitative and quantitative data were recorded from the accessions based on the Crotalaria descriptors. Quantitative data were subjected to analysis of variance using XLSTAT Version 2019, and accession means were separated using Student’s Newman Keuls test at 95% level of confidence. Both qualitative and quantitative data were subjected to multivariate cluster analysis, and a dendrogram was constructed using the unweighted pair-group method with arithmetic average. The principal component analysis was conducted to obtain information on the importance of the characters. Significant variation in agro-morphological traits was found within and between the two species. Cluster analysis grouped the accessions into seven major classes with a between-classes diversity of 75.13% and a within-classes diversity of 24.87%. This study sets the basis for genetic improvement of slender leaf in Kenya since the observed diversity can be exploited in selection for intraspecific and interspecific hybridization.

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Section: Discussionsupporting

confidence: 89%

Section: Data Collectionmentioning

confidence: 99%

Agro-Morphological Characterization of Kenyan Slender Leaf (Crotalaria brevidensandC. ochroleuca) Accessions

Mwakha

Gichimu

Neondo

et al. 2020

International Journal of Agronomy

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“…The study by Mwakha et al (2020), investigated two domesticated species hence the diversity could have been lost over time due to selection pressure. In agreement with the findings of Raj and Britto (2011), the present study established that most of the traits observed were not exclusive to a particular Crotalaria species with the leaf shape trait being among the most diverse qualitative trait. Therefore, agro-morphological characterization alone is not adequate for diversity assessment of Crotalaria and should be supported by other methods such as DNA based techniques.…”

Section: Discussionsupporting

confidence: 91%

“…Individual plants in an accession were characterized morphologically using 18 plant descriptors. The descriptors were; plant height, number of leaflets, leaf length, leaf breadth, leaf area, pod length, pod breadth, number of branches and number of pods per plant (quantitative variables) and stem colour, life span, growth habit, leaf/leaflet shape, stem pubescence, corolla colour, dry pod colour, seed colour and pod shape (qualitative variables) as described by Raj and Britto (2011). The data was used to cluster the 83 accessions based on similarities of these morphological characteristics.…”

Section: Cultivation Characterization and Classificationmentioning

confidence: 99%

Phenomic characterization of Crotalaria germplasm for crop improvement

et al. 2021

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Background Diversification of global food systems through exploration of traditional varieties and wild edible plant species is a focal mitigation strategy for food security worldwide. The present study determined the phenomic diversity of locally available, affordable and climate-resilient cultivated and wild Crotalaria species for breeding purposes. Methods Seed samples were collected from different administrative counties in Kenya spanning different climatic zones. Other seeds were provided by the Genetic Resources Research Institute of Kenya. A randomized complete block design with three replications was used for agro-morphological evaluation of the 83 accessions used in this study. Data on quantitative and qualitative traits was collected. Cluster analysis on R and R-studio was used to generate a dendrogram by the Euclidian genetic distance and dissimilarity indices while the non-metric multidimensional scaling (NMDS) method was used to determine the spatial interrelationship between the accessions. The Pearson’s correlation coefficients were used to determine the relationships between qualitative and quantitative traits while the principal component analysis was used to discriminate the accessions. Results Three edible species (C. brevidens Benth., C. ochroleuca G.Don, C. trichotoma Bojer.) were found to be cultivated by Kenyan farmers and a significant variation (p < 0.0001) for all parameters under study was recorded. Agglomerative hierarchical clustering grouped the accessions into 8 major clusters. The NMDS ordination formed 15 and 6 groups based on counties and regions respectively. Conclusions This study forms the basis for exploring novel breeding strategies among cultivated species, between wild and cultivated Crotalaria species as well as determining molecular markers linked to phenomic traits.

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“…Individual plants in an accession were characterized morphologically using 18 plant descriptors. The descriptors were; plant height, number of lea ets, leaf length, leaf breadth, pod length, pod breadth, number of branches and number of pods per plant (quantitative variables) and stem colour, life span, growth habit, leaf/lea et shape, stem pubescence, corolla colour, dry pod colour, seed colour and pod shape (qualitative variables) as described by Raj and Britto (2011). The data was used to cluster the accessions into 83 morphologically distinct accessions based on similarities of their morphological characteristics.…”

Section: Cultivation Characterization and Classi Cationmentioning

confidence: 99%

Phenomic Characterization of Crotalaria Germplasm for Crop Improvement in Kenya

Muli

Neondo

Odari

et al. 2020

Preprint

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Background: Diversification of global food systems through exploration of traditional varieties and wild edible plant species is a focal mitigation strategy for food security worldwide. The present study determined the phenomic diversity of locally available, affordable and climate-resilient cultivated and wild Crotalaria species for breeding purposes. Seed samples were collected from different administrative counties in Kenya spanning different climatic zones. Other seeds were provided by the Genetic Resources Research Institute of Kenya. A randomized complete block design with three replications was used for agro-morphological evaluation of the 83 accessions used in this study. Data on quantitative and qualitative traits was collected. Cluster analysis on R and R-studio was used to generate a dendrogram by the Euclidian genetic distance and dissimilarity indices while the non-metric multidimensional scaling (NMDS) method was used to determine the spatial interrelationship between the accessions. The Pearson’s correlation coefficients were used to determine the relationships between qualitative and quantitative traits while the principal component analysis was used to discriminate the accessions. Results: Three edible species (C. brevidens Benth., C. ochroleuca G.Don, C. trichotoma Bojer.) were found to be cultivated by Kenyan farmers and a significant variation (p<0.0001) for all parameters under study was recorded. Agglomerative hierarchical clustering grouped the accessions into 8 major clusters. The NMDS ordination formed 15 and 6 groups based on counties and regions respectively. Conclusions: This study forms the basis for exploring novel breeding among cultivated species, between wild and cultivated Crotalaria species as well as determining molecular markers linked to phenomic traits.

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Identification of agronomically valuable species of Crotalaria based on phenetics

Cited by 8 publications

References 12 publications

Agro-Morphological Characterization of Kenyan Slender Leaf (Crotalaria brevidensandC. ochroleuca) Accessions

Agro-Morphological Characterization of Kenyan Slender Leaf (Crotalaria brevidensandC. ochroleuca) Accessions

Phenomic characterization of Crotalaria germplasm for crop improvement

Phenomic Characterization of Crotalaria Germplasm for Crop Improvement in Kenya

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