Variability studies in some qualitative characters of cowpea (&lt;i&gt;Vigna unguiculata&lt;/i&gt;) (L.) Walp) accessions from four cowpea-growing regions of Ghana

Bennett-Lartey, S.O.; Ofori, I

doi:10.4314/gjas.v32i1.1907

Cited by 5 publications

(4 citation statements)

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“…In this study, that character and observation were confirmed when harvesting 17% of accessions which presented their raceme mostly above the canopy. The results of the flowers color are consistent with those found by Cobbinah et al (2011), Nkouannessi (2005 and Bennet-Lartey and Ofori (1999) where the violet flowers were largely represented. According to Purseglove (1968) flower colors that are mostly encountered on the field are pink, white and violet.…”

Section: Cp033 11supporting

confidence: 91%

“…Because of their direct observation on plants during the vegetative and reproductive stages, phenotypic qualitative traits have been widely used to assess genetic variability between accessions in cowpea and other plant species (Bennet-Lartey and Ofori, 1999;Geleta and Labuuschagne, 2005;Ofori et al, 2006). In Cameroon, the lack of detailed information on the genetic diversity of cowpea limits the understanding of its genetic structure and evolution.…”

Section: Discussionmentioning

confidence: 99%

“…According to Bennet-Lartey and Ofori (1999), it is more desirable to have racemes above the canopy than either at the same level of the canopy or within the canopy. This position facilitates pod visibility and harvesting.…”

Section: Cp033 11mentioning

confidence: 99%

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Evaluation of the Genetic Variation of Cowpea Landraces (Vigna unguiculata) from Western Cameroon Using Qualitative Traits

et al. 2017

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Characterization of the genetic diversity and analysis of the genetic relationship between accessions of a crop species is a key step in breeding superior cultivars. The main objective of the hereby study was to determine the genetic variation between 30 cowpea accessions collected throughout the eight divisions of the Western Region of Cameroon using qualitative traits. Phenotypic variation of these accessions was evaluated using diversity indices and cluster analyses. A total of twenty qualitative traits were used for the study. Fifteen of them (75%) were polymorphic, displaying each at least two phenotypic classes. The monomorphic characters were growth pattern, leaf color, leaf hairiness, plant hairiness and pod hairiness, each with only one phenotypic class. Results showed a relatively significant level of genetic diversity among the studied cowpea accessions. Overall, the average of the observed and effective number of phenotypic classes per qualitative trait were Na = 2.350 and Ne = 1.828 respectively. The Nei's genetic diversity and the Shannon weaver diversity index were He = 0.369, ranging from zero (monomorphic trait) to 0.655 (growth habit) and H' = 0.609, ranging from zero (monomorphic trait) to 0.996 (seed crowding), respectively. The dendrogram constructed from the twenty qualitative traits revealed 05 accessions clusters with the number of accessions in each cluster varying from one to eleven. Information obtained from this study is likely be useful for future cowpea breeding program.

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Section: Cp033 11supporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

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Evaluation of the Genetic Variation of Cowpea Landraces (Vigna unguiculata) from Western Cameroon Using Qualitative Traits

et al. 2017

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“…The present research showed that high variability defines pod color (L*, hue, chroma) and dark purple pigmentation on pods. In addition, the pattern of pigment distribution of full grown immature pods varied (COBBINAH et al, 2011), and many cowpea cultivars contain anthocyanin either partially or wholly purple on pods (FERY, 1985;SINGH and RACHIE, 1985;BENNET-LARTEY and OFORI, 1999).…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity of farmer-preferred cowpea (Vigna unguiculata L. Walp) landraces in Turkey and evaluation of their relationships based on agromorphological traits

2017

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2017): Genetic diversity of farmerpreferred cowpea (Vigna unguiculata L. walp) landraces in Turkey and evaluation of their relationships based on agromorphological traits. Vol 49, No.3, Cowpea (Vigna unguiculata L. Walp) is one of the important vegetable, grain, and fodder legume species grown in the tropics and subtropics. Cowpea is grown on small farms, and locally adapted landraces or populations are cultivated, and genetic improvements are limited by the lack of knowledge of genetic diversity of the indigenous and cultivated germplasm. Characterization and classification of diversity of the germplasm is valuable for both plant breeders and germplasm curators in the development of conservation strategies and identification of plant genetic resources. In the present study, 36 qualitative and quantitative agromorphological traits were used to characterize and assess the genetic diversity of 32 farmer preferred cowpea genotypes collected from diverse cultivated locations. Genetic variation was highly significant, and phenotypic diversity was observed for agromorphological traits. Agromorphological traits were classified by principal components analysis (PCA) into 10 components, which explained 81.18% of the total variation. PCA revealed that seed properties such as weight, diameter, width, length, eye color and immature pod pigmentation, leaf and pod color properties were the primary characteristics to discriminate cowpea genotypes. The hierarchical analysis grouped the genotypes into five clusters, and significant association was not apparent between geographic origin and agromorphological traits. The promising germplasm was identified to improve the landraces for fresh pod, grain, and fodder.

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Response of pepper (Capsicum annuum L.) to preemergence application of Oxadiargyl and pendimethalin

Nketiah,

Ofosu–Anim,

Cornelius

et al. 2023

Journal of Agriculture and Food Research

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Variability studies in some qualitative characters of cowpea (<i>Vigna unguiculata</i>) (L.) Walp) accessions from four cowpea-growing regions of Ghana

Cited by 5 publications

References 1 publication

Evaluation of the Genetic Variation of Cowpea Landraces (Vigna unguiculata) from Western Cameroon Using Qualitative Traits

Evaluation of the Genetic Variation of Cowpea Landraces (Vigna unguiculata) from Western Cameroon Using Qualitative Traits

Genetic diversity of farmer-preferred cowpea (Vigna unguiculata L. Walp) landraces in Turkey and evaluation of their relationships based on agromorphological traits

Response of pepper (Capsicum annuum L.) to preemergence application of Oxadiargyl and pendimethalin

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