scholarly journals First morphological characterization of autochthonous olive (Olea europaea L.) denominations from central and eastern of Algeria

2020 ◽  
Vol 116 (2) ◽  
pp. 311
Author(s):  
Rachid BOUKHARI ◽  
Abdelkader AMEUR AMEUR ◽  
Hocine INNAL ◽  
Semir Bechir Suheil GAOUAR
Keyword(s):  
Olea Europaea ◽  
Diversity Index ◽  
Multiple Correspondence Analysis ◽  
Genetic Erosion ◽  
Morphological Characteristics ◽  
Principal Component ◽  
Morphological Characterization ◽  
Critical Conditions ◽  
Morphological Description ◽  
Olea Europaéa

<p>Olive (<em>Olea europaea</em> L.) resources in Algeria are very little investigated. In fact, a total of 60 denominations have been the subject of characterization studies and they are cited in the bibliography but only 36 varieties are described and listed in the catalog of Algerian varieties of olive tree. In this work, a study on the diversity by mean of a field survey followed by morphological characterization, an estimate of the Shannon diversity index of a set of denominations collected in central and eastern of Algeria were carried out.<strong> </strong>The survey allowed us to note the existence of 33 denominations never mentioned in the bibliography. Morphological characterization based on the characteristics of tree, fruit and endocarp allowed us to a morphological description of 23 denominations. The Principal Component Analysis, Multiple Correspondence Analysis and Ascending Hierarchical Classification analysis allowed us to classify them into a few groups. The value of the relative diversity of all denominations is slightly below the average (0.42).<strong> </strong>The results obtained in this work provide very useful information on certain morphological characteristics of the studied denominations and indicate the critical conditions in which several denominations are found, which constitutes a great risk of genetic erosion.</p>

scholarly journals CHANGES IN FRUIT YIELD AND PHOTOSYNTHESIS PARAMETERS IN DIFFERENT OLIVE CULTIVARS (Olea europaea L.) UNDER CON-TRASTING WATER REGIMES

2020 ◽  
Vol 19 (3) ◽  
pp. 135-147
Author(s):  
Majid Golmohammadi ◽  
Omid Sofalian ◽  
Mehdi Taheri ◽  
Alireza Ghanbari ◽  
Valiollah Rasoli
Keyword(s):  
Drought Stress ◽  
Olea Europaea ◽  
Principal Component ◽  
Fruit Yield ◽  
Photosynthetic Parameters ◽  
Olive Cultivar ◽  
Drought Treatment ◽  
Olea Europaea L ◽  
Olive Cultivars ◽  
Olea Europaéa

The evergreen tree olive (Olea europaea L.) is the only species of the genus Olea that produces edible fruits with high ecological and economic value. This tree species has developed a series of physiochemical mechanisms to tolerate drought stress and grow under adverse climatic environments. One of these mechanisms is photosynthesis activities, so that as yet little information achieved about the relations between olive production and photosynthetic parameters under drought conditions. An experiment was carried out during two consecutive years (2015–2017) to study the response of 20 different olive tree cultivars (Olea europaea L.) to drought stress. Several parameters like net photosynthetic rate (PN), stomatal conductance (GS), transpiration rate (TE), photosynthetic pigments (total chlorophyll, chlorophyll a, b and carotenoid) and fruit yield were measured. The results of combined analysis of variance for fruit yield and other measured traits showed that year, drought treatment, cultivar main effects and their interactions were highly significant. The results indicated that drought stress reduced all traits, however GS (42.80%), PN (37.21%) and TE (37.17%) significantly affected by drought. Lower reduction in photosynthetic performance (PN, GS and TE) in the cultivar T7 compared to other olive cultivars allowed them to maintain better fruit yield. Principal component analysis (PCA) identified two PCs that accounted for 82.04 and 83.27% of the total variation in photosynthetic parameters under optimal and drought stress conditions, respectively. Taken together, mean comparison, relative changes due to drought and biplot analysis revealed that cultivars ‘T7’, ‘Roghani’, ‘Koroneiki’, ‘Korfolia’ and ‘Abou-satl’ displayed better response against drought stress. According to our results, one olive cultivar namely ‘T7’, could be used in olive breeding programs to improve new high yielding cultivars with drought tolerance for use in the drought-prone environments.

Redescription of Aceria oleae (Nalepa, 1900) (Acari: Eriophyidae) using SEM, life cycle and damage caused to leaves and fruits of Olea europaea cv. arauco in La Rioja province, northwestern Argentina

2020 ◽  
Vol 25 (11) ◽  
pp. 2003-2017
Author(s):  
Leiva Sergio ◽  
Moraes Gilberto J. De
Keyword(s):  
Life Cycle ◽  
Olea Europaea ◽  
Mite Species ◽  
Morphological Characterization ◽  
Morphological Aspects ◽  
Production Areas ◽  
La Rioja ◽  
Olea Europaéa

Damages produced by eriophyid mites to Olea europaea subsp. europaea cv. arauco have been known for many years. In a previous publication, the presence of Aceria oleae (Nalepa) and Oxycenus maxwelli, (Keifer) in Argentina was reported, but the species was not definitively identified. In the past five years, damage caused by this mite to leaves, flowers and fruits in many production areas was very high, leading to the need for further investigations about this mite, the most numerous mite species on this plant in Argentina. The present paper is divided in three parts: a) a morphological characterization of A. oleae based on specimens collected in Argentina, with the use of SEM; b) a study of its life cycle; and c) an illustration of its damage to leaves and fruits. The morphological study led to the confirmation of the identity of the species and to the determination of morphological aspects not previously mentioned in the literature. Life cycle and damage were observed to be similar to what has been previously mentioned in the literature for the same mite in other countries.

Mycelial compatibility groups in Buenos Aires field populations of Sclerotinia sclerotiorum (Sclerotiniaceae)

2003 ◽  
Vol 51 (4) ◽  
pp. 421 ◽  
Author(s):  
Sandra B. Durman ◽  
Ana B. Menéndez ◽  
Alicia M. Godeas
Keyword(s):  
Sclerotinia Sclerotiorum ◽  
Buenos Aires ◽  
Diversity Index ◽  
Morphological Characteristics ◽  
Principal Component ◽  
Dry Weight ◽  
Buenos Aires Province ◽  
Similar Frequency ◽  
Mycelial Compatibility ◽  
Total Diversity

One-hundred and forty isolates of Sclerotinia sclerotiorum (Lib.) DeBary were obtained in a 6500-km2 area of the Buenos Aires Province. These isolates were collected from soybean (60 isolates), lettuce (59 isolates) and sunflower (21 isolates) fields. Fifty different mycelial compatibility groups (MCGs) were distinguished overall, 27 of which consisted of two or more isolates. Populations of S. sclerotiorum were made up by numerous MCGs and shared a similar frequency profile regardless the locality or the date of sampling. MCG occurrences differed among the crops, only two MCGs were shared by the three crops and approximately 60% of the MCGs were unique for each crop. The Shannon diversity index (Ho) of MCG for the whole region was 0.314 (Htot). Partition of total diversity (Htot) showed that 98.4% corresponded to variations of diversity within populations. Morphological characteristics were not significantly different among MCGs, except for the dry weight per sclerotium. On the basis of the detached celery petiole assay, there were no differences in aggressiveness between MCGs either. However, isolates collected from sunflower plants were more aggressive than those collected from soybean, regardless the MCG they belonged. Aggressiveness was positively correlated to colony radial growth. After principal component analyses (PCA) were performed, it could be identified a main central group of isolates and two other smaller groups. Main contributors to the total variance were the percentages of large sclerotia, the dry weight per sclerotium and the percentages of medium and small sclerotia.

scholarly journals Exploring morpho-physiological profiles of a collection of tomato (Solanum lycopersicum) germplasm using multivariate statistics

2020 ◽  
Vol 18 (2) ◽  
pp. 88-97
Author(s):  
Ifigeneia Mellidou ◽  
Konstantinos Krommydas ◽  
Irini Nianiou-Obeidat ◽  
Georgia Ouzounidou ◽  
Apostolos Kalivas ◽  
...  
Keyword(s):  
Solanum Lycopersicum ◽  
Phenotypic Diversity ◽  
Diversity Index ◽  
Total Yield ◽  
Morphological Characteristics ◽  
Principal Component ◽  
Fruit Shape ◽  
Qualitative Traits ◽  
Germplasm Collections ◽  
Wide Range

AbstractA selection of tomato (Solanum lycopersicum L.) genotypes with diverse origin and breeding history including 33 landraces, eight modern varieties and two commercial hybrids has been characterized using a set of 25 qualitative descriptors and six quantitative traits. A wide range of variation was evident for the majority of traits, highlighting their utility for characterizing tomato germplasm collections. A plethora of qualitative traits including type of leaf blade, depression and ribbing at peduncle end, fruit shape at blossom end, number of locules and flowering time, as well as measured traits with economic importance such as fruit fresh weight, firmness and total yield per plant, were found to be highly variable within the collection, with a diversity index greater than 0.8. Strong correlations were detected among several traits related to fruit yield and quality. Two-dimensional principal component analysis as well as the unsupervised hierarchical clustering grouped genotypes according to their phenotypic resemblance and morphological characteristics to a great extent. Landraces from different origins were scattered across the whole variation spectrum of PC1 and PC2. A set of six qualitative traits could efficiently discriminate cultivars in PCA (explaining 75% of total variation), suggesting that it can serve as a valuable breeding tool for the germplasm characterization. The evaluation of the phenotypic diversity in the collection as well as the identification of traits that contribute most to heterogeneity have important implications for establishing core collections with high diversity, as well as designing breeding schemes across the Mediterranean basin.

scholarly journals Evaluation of Variability in Tunisian Olea europaea L. Accessions using Morphological Characters and Computational Approaches

2017 ◽  
Vol 45 (1) ◽  
pp. 262-269 ◽  
Author(s):  
Karim ENNOURI ◽  
Rayda BEN AYED ◽  
Sezai ERCISLI ◽  
Fathi BEN AMAR ◽  
Mohamed Ali TRIKI
Keyword(s):  
Principal Components ◽  
Olea Europaea ◽  
Leaf Shape ◽  
Geographical Location ◽  
Principal Component ◽  
Morphological Characters ◽  
Fruit Shape ◽  
Data Set ◽  
Olea Europaea L ◽  
Olea Europaéa

The olive trees (Olea europaea L.) have been cultivated for millennia in the Mediterranean basin and its oil has been an important part of human nutrition in the region. In order to distinguish between olive accessions, morphological and biological characters have been widely and commonly used for descriptive purposes and have been used to characterize olive accessions. A comparative study of morphological characters of olive accessions grown in Tunisia was carried out and analyzed using Bayesian Networks (BN) and Principal Components Analysis (PCA). The obtained results showed that averages of fruit and kernel weights were 2.27 grams and 0.41 grams, respectively.  Besides, a relatively moderate level of variation (51.22%) being explained by four Principal components. BN revealed that geographical localisation plays a role in the increase of tree habit, size of lenticels and leaf shape. A dendrogram has been carried out in the aim to classify studied olive accessions. We proposed a novel method of analysis based on the three-step scheme, in which first the data set is clustered, then olive tree features are evaluated. The studied accessions can be divided into four main groups by cutting the dendrogram at a similarity value of 0.645. Different relationships are studied and highlighted, and finally the collected features are subjected to a global principal component analysis. Obtained results confirmed that core surface was negatively correlated with geographical location (r = -0.52, p<0.05) and maturation period r = -0.539, p<0.05). Number of lenticels was positively correlated to lenticels size (r = 0.632, p<0.05). Core shape had a negative correlation with fruit shape (r = -0.759, p<0.05). On the basis of these findings, this research confirmed that morphological markers are a preliminary tool to characterize olive oil accessions.

scholarly journals Morphological characterization and hierarchical classification of 40 bush pea genotypes (Pisum sativum L.)

2021 ◽  
Vol 15 (2) ◽  
Author(s):  
Verónica Rosero-Lombana ◽  
Oscar Checa-Coral
Keyword(s):  
Multiple Correspondence Analysis ◽  
Hierarchical Classification ◽  
Principal Component ◽  
Morphological Characterization ◽  
The European Union ◽  
Color Degree ◽  
Qualitative Variables ◽  
Total Variability ◽  
New Varieties ◽  
Hierarchical Classification Analysis

The Universidad de Nariño is home to a collection of bush pea plantlets that are a source of biodiversity for the genetic improvement of pea species in Colombia. The characterization of these accessions is required to identify genotypes with attributes that could be used in the search for new varieties. For the morphological characterization, 40 pea accessions were planted in Pasto, Colombia. 23 quantitative variables and 12 qualitative variables were documented, descriptors proposed for this species by the European Union in 2003. The data were subjected to Principal Component Analysis and Multiple Correspondence Analysis. Finally, a hierarchical classification method was applied using Ward’s method. The first four components, which explained 78.80% of the total variability of the population, were selected for the quantitative variables. Four groups were identified. Genotypes with the afila gene, which are of interest for pea breeding programs, were found in groups 1 and 2. The highest seed weight was in group 1, and the genotypes with the best reaction to powdery mildew were in group four. For the qualitative variables, the first six factors, which described 60.51% of the variability, were selected, and the hierarchical classification analysis resulted in five groups. The qualitative characteristics that contributed more to the differentiation of the groups included leaflet type, hilum color, degree of curvature of the pod, color and shape of the grain.

scholarly journals Morphological characterization of elite cacao trees (Theobroma cacao L.) in Tumaco, Nariño, Colombia

2016 ◽  
Vol 9 (2) ◽  
pp. 313 ◽  
Author(s):  
William Ballesteros P. ◽  
Tulio César Lagos B. ◽  
Hugo Ferney L.
Keyword(s):  
Multiple Correspondence Analysis ◽  
Rural Poverty ◽  
Principal Component ◽  
Morphological Characterization ◽  
Anthocyanin Pigmentation ◽  
Cocoa Beans ◽  
Moniliophthora Perniciosa ◽  
Plant Collections ◽  
And Cluster Analysis

The cacao has become an essential part of the fight against the effects of illegal crops and rural poverty in Colombia. Because of their bromatological characteristics, cocoa beans are preferred in markets. However, there are few studies on the variability of the regional genotypes. The goal of this study was to characterize the cacao trees in Tumaco, Nariño (Colombia) and establish their morpho-agronomic variability. Plant collections were conducted in five production zones of the municipality between 0 to 270 m. On each farm, the productivity and plant health variables were recorded for the outstanding plants. The characterization was carried out using a Principal Component Analysis (PCA), Multiple Correspondence Analysis (MCA) and Cluster analysis. In the PCA, the first five components explained 70.2% of the variation. The first three components were characterized by productivity, while the last two components showed a low pod and grain index. In the MCA, the first three factors expressed 39.5% of the variation. The first three corresponded to the cundeamor cacao, acute pod apex, absence of anthocyanin in ripe fruits, without notable pulvinus, staminodes without anthocyanins, and moderately susceptible to <em>Moniliophthora perniciosa</em>. The last two components reported tolerance to <em>M. roreri</em> and <em>Crinnipellis perniciosa, </em>intense anthocyanin pigmentation on the floral buttons and Angoleta-shaped fruit. The selected genotypes showed important characteristics that must be analyzed with molecular and sensorial analyses.

scholarly journals Cultivar-Dependent Anticancer and Antibacterial Properties of Silver Nanoparticles Synthesized Using Leaves of Different Olea Europaea Trees

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1544 ◽  
Author(s):  
Valeria De Matteis ◽  
Loris Rizzello ◽  
Chiara Ingrosso ◽  
Eva Liatsi-Douvitsa ◽  
Maria Luisa De Giorgi ◽  
...  
Keyword(s):  
Olea Europaea ◽  
Antibacterial Properties ◽  
Morphological Characterization ◽  
Breast Adenocarcinoma ◽  
Well Water ◽  
Synthesis Of Nanoparticles ◽  
Olive Cultivars ◽  
Mediterranean Plant ◽  
Mcf 7 ◽  
Olea Europaéa

The green synthesis of nanoparticles (NPs) is currently under worldwide investigation as an eco-friendly alternative to traditional routes (NPs): the absence of toxic solvents and catalysts make it suitable in the design of promising nanomaterials for nanomedicine applications. In this work, we used the extracts collected from leaves of two cultivars (Leccino and Carolea) belonging to the species Olea Europaea, to synthesize silver NPs (AgNPs) in different pH conditions and low temperature. NPs underwent full morphological characterization with the aim to define a suitable protocol to obtain a monodispersed population of AgNPs. Afterwards, to validate the reproducibility of the mentioned synthetic procedure, we moved on to another Mediterranean plant, the Laurus Nobilis. Interestingly, the NPs obtained using the two olive cultivars produced NPs with different shape and size, strictly depending on the cultivar selected and pH. Furthermore, the potential ability to inhibit the growth of two woman cancer cells (breast adenocarcinoma cells, MCF-7 and human cervical epithelioid carcinoma, HeLa) were assessed for these AgNPs, as well as their capability to mitigate the bacteria concentration in samples of contaminated well water. Our results showed that toxicity was stronger when MCF-7 and Hela cells were exposed to AgNPs derived from Carolea obtained at pH 7 presenting irregular shape; on the other hand, greater antibacterial effect was revealed using AgNPs obtained at pH 8 (smaller and monodispersed) on well water, enriched with bacteria and coliforms.

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

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.

scholarly journals Morphological and Biochemical Characterization of Wild Hop (Humulus lupulus L.) Populations from Banja Luka Area (Bosnia and Herzegovina)

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 239
Author(s):  
Danijela Kondić ◽  
Andreja Čerenak ◽  
Iztok Jože Košir ◽  
Miha Ocvirk ◽  
Tanja Krmpot ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Analysis Of Variance ◽  
Biochemical Characterization ◽  
Morphological Characteristics ◽  
Principal Component ◽  
Morphological Characterization ◽  
Humulus Lupulus L ◽  
Banja Luka ◽  
Cone Density

This study aims to do a morphological and biochemical characterization of selected wild hop populations from the Banja Luka region, as plant material with potential value for introduction into plant selection. Female inflorescences (cones) from seven populations (DKH3, DKH5, DKH6, DKH8, DKH9, DKH10, and DKH11) were sampled in 2018 and 2019. Hop cones were collected in October 2018 and 2019 for morphological characterization, when 50 cones per population were analyzed, and also the cones were collected in mid-September in 2019 for biochemical characterization. Morphological parameters were carried out for: cone length (cm), number of nodes per cone spindle, cone density, and number of seeds per cone, all important agronomic characters in hop production. Also, 27 components of essential oil and 6 components of hop resins were analyzed. Statistical analysis of morphological characteristics was performed by factorial analysis of variance (year × population), and the significance of individual differences was determined by LSD test. The grouping of examined hop populations according to the manifested morphological characteristics was performed by cluster analysis. Statistical analysis for biochemical characteristics was performed by analysis of variance, and the significance of the differences was tested by Tukey’s statistical test. In order to determine similarities between different population multivariant statistical method Principal component analysis (PCA) was applied. According to morphological and biochemical analysis, DKH6 hop population is singled out as the most valuable for hop breeding.

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