Genetic variation and seed yield in Tunisian castor bean (&lt;em&gt;Ricinus communis&lt;/em&gt; L.)

Saadaoui, Ezzeddine; Martín-Gómez, José Javier; Ghazel, Naziha; YAHIA, Kaouther Ben; Tlili, Nizar; Cervantés, Emilio

doi:10.17129/botsci.850

Cited by 6 publications

(7 citation statements)

References 13 publications

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“…Although the shape of the seeds is conserved within a species (Cervantes & Martín‐Gómez, 2019), studies have reported that it can vary according to the edaphic and climatic characteristics of the region where the mother plant is grown. The effect of the growth environment on seed shape was found in Olea europaea L. (Hannachi et al., 2017) and Ricinus communis L. (Saadaoui et al., 2017).…”

Section: Discussionmentioning

confidence: 99%

Discrimination of Urochloa seed genotypes through image analysis: Morphological features

et al. 2021

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The tropical forage species seed market, including signalgrass (Urochloa), is expanding. There is demand for fast, automated methods that can be implemented for quality control of the seeds produced, with the aim of evaluating physical purity. In this respect, seed morphological features obtained by processing radiographs with the Tomato Analyzer software and of red-green-blue obtained and processed on the Groundeye device were used to test differentiation of materials of the Urochloa genus. Seeds of Urochloa brizantha (A.Rich.) R.D.Webster cvv. BRS Piatã, Marandu, and Xaraés MG-5; Urochloa ruziziensis (R.Germ. & C.M.Evrard) Crins cv. Ruziziensis; and Urochloa decumbens (Stapf) R.D.Webster cv. Basilisk were evaluated. Morphological features obtained by Tomato Analyzer allowed differentiation of Urochloaseeds at an accuracy level greater than 80% for all the materials evaluated. Seed area was one of the features that allowed this differentiation. The Groundeye system also showed high efficiency in distinguishing Urochloa seeds, except for Piatã and Xaraés, which exhibited morphological similarity, and lower accuracy levels in distinguishing their seeds (<50%). Additional studies should be conducted to evaluate Urochloa seed lots from other origins to validate the use of image analysis techniques for the purpose of obtaining morphological features and to assist in determining the physical purity of the materials. INTRODUCTIONCorrect identification of species and even cultivars in the seed analysis laboratory is a time-consuming operation (Chaugule & Mali, 2016) because of the similarity among seeds of the same genus, or even as a result of the absence of specific morphological descriptors of the materials under Abbreviations: LDA, linear discriminant analysis; RGB, red-green-blue; WMIH, width at mid-height.

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Section: Discussionmentioning

confidence: 99%

Discrimination of Urochloa seed genotypes through image analysis: Morphological features

et al. 2021

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“…Torke or Zebra for example), the latter being more rounded [25,26]. Also, seed shape may vary in plants grown in different geographic regions or climatic conditions, as observed in Olea europaea L. [27], Jatropha curcas L. [28], and Ricinus communis L. [29,30]. Finally, quantitative differences in seed shape between wild-type seeds and mutants have been also reported for Arabidopsis thaliana, Medicago truncatula, and Lotus japonicus [31][32][33].…”

Section: Variations In Seed Shapementioning

confidence: 98%

“…The cardioid was also the figure used in the model legume Lotus japonicus L. (Fabaceae) [33], and in Capparis spinosa L. (Capparaceae) [35]. The ellipse was the model in Jatropha curcas L. and Ricinus communis L. (Euphorbiaceae) [28][29][30], and in Quercus species (Fagaceae) [36].…”

Section: Variations In Seed Shapementioning

confidence: 99%

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Seed Shape Description and Quantification by Comparison with Geometric Models

Cervantés

Gómez

2019

Horticulturae

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Modern methods of image analysis are based on the coordinates of the points making the silhouette of an image and allow the comparison between seed shape in different species and varieties. Nevertheless, these methods miss an important reference point because they do not take into consideration the similarity of seeds with geometrical figures. We propose a method based on the comparison of the bi-dimensional images of seeds with geometric figures. First, we describe six geometric figures that may be used as models for shape description and quantification and later on, we give an overview with examples of some of the types of seed morphology in angiosperms including families of horticultural plants and addressing the question of how is the distribution of seed shape in these families. The relationship between seed shape and other characteristics of plant species is discussed.

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“…In Capparis spinosa L., the comparison of seed images with the cardioid curve was helpful to describe differences between two subspecies (Saadaoui et al, 2013). In the Euphorbiaceae Jatropha curcas L. and Ricinus communis L., seed shape was quantified by comparison with an ellipse; the form/production relationship has been verified (Saadaoui et al, 2015(Saadaoui et al, , 2017Martín-Gómez et al, 2016).…”

Section: Introduction Introduction Introduction Introductionmentioning

confidence: 99%

Seed diversity and germination behavior in Nerium oleander L.

et al. 2023

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Nerium oleander var. ‘Villa Romaine’, commonly called oleander, is an ornamental shrub that exists in Tunisia in the wild and cultivated form. This plant is frequently propagated and produced in nurseries and used in urban plantings and on roadsides. The effects of nature of the plants (spontaneous or cultivated), climatic conditions (localities), and altitude (from 6 to 447 m) on seed shape, size, and germination of Tunisian populations, were investigated. Seeds were harvested from 23 locations belonging to six bioclimatic stages and distributed from North to South of Tunisia. The seed parameters studied were area, roundness, J index, and germination rate. A significant variation was obtained between populations, categories (cultivated and spontaneous), bioclimatic zones and altitudes. Seeds of cultivated plants were the smaller and showed the higher germination rates, compared with spontaneous populations, which had large seeds and a low germination rate. Climatic conditions and geographical location had an effect on seed morphology; seeds in lower humid were small for both cultivated and spontaneous types, they also showed a low J index value and a high germination rate. On the other hand, in upper Saharan, seeds were large and roundness and germination rate were the lowest. Also, seeds from plants in higher altitudes were the smaller and presented the lower values of the J index compared with those collected from low-altitude sites.

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Genetic variation and seed yield in Tunisian castor bean (<em>Ricinus communis</em> L.)

Cited by 6 publications

References 13 publications

Discrimination of Urochloa seed genotypes through image analysis: Morphological features

Discrimination of Urochloa seed genotypes through image analysis: Morphological features

Seed Shape Description and Quantification by Comparison with Geometric Models

Seed diversity and germination behavior in Nerium oleander L.

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