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  1. Article: Genotypic influence in the juvenile to adult transition in olive seedlings.

    Valverde, Pedro / Diez, Concepción Munoz / Deger, Rustu Efe / Barranco, Diego / Trapero, Carlos

    Frontiers in plant science

    2024  Volume 15, Page(s) 1343589

    Abstract: Olive breeding is a long process and any improvement in shortening the juvenile phase is highly desirable. In the present study, the effect of olive tree parents in different agronomic characteristics have been evaluated during four years in 520 olive ... ...

    Abstract Olive breeding is a long process and any improvement in shortening the juvenile phase is highly desirable. In the present study, the effect of olive tree parents in different agronomic characteristics have been evaluated during four years in 520 olive genotypes generated from three different crosses in three different experimental fields, all located in Andalusia region, Spain. The crosses evaluated are 'Arbosana' x 'Sikitita' and its reciprocal, whose parents are characterized by being early bearers; and 'Frantoio' free pollinated, whose mother variety is characterized by having a long unproductive period. We studied plant height, distance and time to the first flowering, plant vigor and percentage of olive oil in the fruits. The findings reveal that progeny from 'Arbosana' and 'Sikitita' crosses, irrespective of the direction of the cross, exhibited a lower distance to flower, early bearing, reduced vigor and a lower percentage of olive oil in fruit compared to 'Frantoio' seedlings obtained from free pollination. Furthermore, no discernible differences were observed in the evaluated characteristics when comparing reciprocal crosses across the three fields in the four-years assessment period. Therefore, these results highlight the significance of planting height in reducing the evaluation period required in an olive breeding program and support the hypothesis that there is no maternal effect in the inheritance of the evaluated agronomic characteristics in olive trees.
    Language English
    Publishing date 2024-02-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2024.1343589
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The Origin of Spanish Durum Wheat and Olive Tree Landraces Based on Genetic Structure Analysis and Historical Records

    Martínez-Moreno, Fernando / Guzmán-Álvarez, José Ramón / Díez, Concepción Muñoz / Rallo, Pilar

    Agronomy. 2023 June 14, v. 13, no. 6

    2023  

    Abstract: In this study, the origin of Spanish durum wheat and olive tree landrace collections (preserved in seed banks and ex situ field collections, respectively) was traced throughout different studies on genetic structure analysis of different landrace ... ...

    Abstract In this study, the origin of Spanish durum wheat and olive tree landrace collections (preserved in seed banks and ex situ field collections, respectively) was traced throughout different studies on genetic structure analysis of different landrace collections and historical records of plant material circulation of these two crops in the south and east of Spain (the main cultivation areas). Although there were several groups of Spanish durum wheat landraces, they did not cluster geographically and likely came from intense grain circulation within the country and abroad (due to a high seeding rate of about 100 kg/ha and an unstable production) from the 15 to 19th centuries (especially the Maghreb and Sicily). However, Spanish olive tree landraces experienced lower genetic circulation over time and space due to the longevity of the species and the large size of the reproductive material. They can be clearly divided into two groups: those from the south, of Maghrebi origin, which most likely originated during the Islamic expansion of the 8–15th centuries, and those from the east, arriving most likely during Roman times from Italy. The genetic circularity levels of the plant material of these two crops are different.
    Keywords Olea europaea ; agronomy ; durum wheat ; genetic structure ; landraces ; longevity ; Italy ; Maghreb ; Sicily ; Spain
    Language English
    Dates of publication 2023-0614
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2607043-1
    ISSN 2073-4395
    ISSN 2073-4395
    DOI 10.3390/agronomy13061608
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Efficiency of breeding olives for resistance to Verticillium wilt.

    Valverde, Pedro / Barranco, Diego / López-Escudero, Francisco Javier / Díez, Concepcion Munoz / Trapero, Carlos

    Frontiers in plant science

    2023  Volume 14, Page(s) 1149570

    Abstract: Olive trees are the most cultivated evergreen trees in the Mediterranean Basin, where they have deep historical and socioeconomic roots. The ... ...

    Abstract Olive trees are the most cultivated evergreen trees in the Mediterranean Basin, where they have deep historical and socioeconomic roots. The fungus
    Language English
    Publishing date 2023-02-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2023.1149570
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: The Singular Evolution of

    Mascagni, Flavia / Barghini, Elena / Ceccarelli, Marilena / Baldoni, Luciana / Trapero, Carlos / Díez, Concepción Muñoz / Natali, Lucia / Cavallini, Andrea / Giordani, Tommaso

    Frontiers in plant science

    2022  Volume 13, Page(s) 869048

    Abstract: The current view of plant genome evolution proposes that genome size has mainly been determined by polyploidisation and amplification/loss of transposons, with a minor role played by other repeated sequences, such as tandem repeats. In cultivated olive ( ...

    Abstract The current view of plant genome evolution proposes that genome size has mainly been determined by polyploidisation and amplification/loss of transposons, with a minor role played by other repeated sequences, such as tandem repeats. In cultivated olive (
    Language English
    Publishing date 2022-03-31
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2022.869048
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book ; Online: OliVaR

    Miho, Hristofor / Pagnotta, Giulio / Hitaj, Dorjan / De Gaspari, Fabio / Mancini, Luigi V. / Koubouris, Georgios / Godino, Gianluca / Hakan, Mehmet / Diez, Concepcion Muñoz

    Improving Olive Variety Recognition using Deep Neural Networks

    2023  

    Abstract: The easy and accurate identification of varieties is fundamental in agriculture, especially in the olive sector, where more than 1200 olive varieties are currently known worldwide. Varietal misidentification leads to many potential problems for all the ... ...

    Abstract The easy and accurate identification of varieties is fundamental in agriculture, especially in the olive sector, where more than 1200 olive varieties are currently known worldwide. Varietal misidentification leads to many potential problems for all the actors in the sector: farmers and nursery workers may establish the wrong variety, leading to its maladaptation in the field; olive oil and table olive producers may label and sell a non-authentic product; consumers may be misled; and breeders may commit errors during targeted crossings between different varieties. To date, the standard for varietal identification and certification consists of two methods: morphological classification and genetic analysis. The morphological classification consists of the visual pairwise comparison of different organs of the olive tree, where the most important organ is considered to be the endocarp. In contrast, different methods for genetic classification exist (RAPDs, SSR, and SNP). Both classification methods present advantages and disadvantages. Visual morphological classification requires highly specialized personnel and is prone to human error. Genetic identification methods are more accurate but incur a high cost and are difficult to implement. This paper introduces OliVaR, a novel approach to olive varietal identification. OliVaR uses a teacher-student deep learning architecture to learn the defining characteristics of the endocarp of each specific olive variety and perform classification. We construct what is, to the best of our knowledge, the largest olive variety dataset to date, comprising image data for 131 varieties from the Mediterranean basin. We thoroughly test OliVaR on this dataset and show that it correctly predicts olive varieties with over 86% accuracy.

    Comment: 10 pages, 9 figures
    Keywords Computer Science - Computer Vision and Pattern Recognition ; Computer Science - Computers and Society ; Computer Science - Machine Learning
    Subject code 006
    Publishing date 2023-03-01
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Assessment of Maternal Effects and Genetic Variability in Resistance to

    Valverde Caballero, Pedro / Trapero Ramírez, Carlos / Barranco Navero, Diego / López-Escudero, Francisco J / Gordon Bermúdez-Coronel, Ana / Díez, Concepción Muñoz

    Plants (Basel, Switzerland)

    2021  Volume 10, Issue 8

    Abstract: The use of genetic resistance is likely the most efficient, economically convenient and environmentally friendly control method for plant diseases, as well as a fundamental piece in an integrated management strategy. This is particularly important for ... ...

    Abstract The use of genetic resistance is likely the most efficient, economically convenient and environmentally friendly control method for plant diseases, as well as a fundamental piece in an integrated management strategy. This is particularly important for woody crops affected by diseases in which mainly horizontal resistance mechanisms are operative, such as Verticillium wilt, caused by
    Language English
    Publishing date 2021-07-27
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10081534
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Assessment of Maternal Effects and Genetic Variability in Resistance to Verticillium dahliae in Olive Progenies

    Valverde Caballero, Pedro / Trapero Ramírez, Carlos / Barranco Navero, Diego / López-Escudero, Francisco J. / Gordon Bermúdez-Coronel, Ana / Díez, Concepción Muñoz

    Plants. 2021 July 27, v. 10, no. 8

    2021  

    Abstract: The use of genetic resistance is likely the most efficient, economically convenient and environmentally friendly control method for plant diseases, as well as a fundamental piece in an integrated management strategy. This is particularly important for ... ...

    Abstract The use of genetic resistance is likely the most efficient, economically convenient and environmentally friendly control method for plant diseases, as well as a fundamental piece in an integrated management strategy. This is particularly important for woody crops affected by diseases in which mainly horizontal resistance mechanisms are operative, such as Verticillium wilt, caused by Verticillium dahliae. In this study, we analyzed the variability in resistance to Verticillium wilt of olive trees in progenies from five crosses: ‘Picual’ × ‘Frantoio’, ‘Arbosana’ × ‘Koroneiki’, ‘Sikitita’ × ‘Arbosana’, ‘Arbosana’ × ‘Frantoio’ and ‘Arbosana’ × ‘Arbequina’ and their respective reciprocal crosses. Additionally, seedlings of ‘Picual’ and ‘Frantoio’ in open pollination were used as controls. In October 2016 and 2018, the fruits were harvested, and seeds germinated. Six-week-old seedlings were inoculated by dipping their bare roots in a conidial suspension of V. dahliae, and disease progress in terms of symptom severity and mortality was evaluated weekly. Additionally, seedling growth was evaluated every two weeks. At the end of the experiment, no significant differences were found for any of the assessed parameters when reciprocal crosses were compared. These results suggest that there is no maternal or paternal effect in regard to the heritability of resistance. In addition, this study identifies the best crosses for obtaining the highest number of resistant genotypes, highlighting the importance of the selection of specific cultivars to optimize the breeding process.
    Keywords Verticillium dahliae ; Verticillium wilt ; conidia ; control methods ; cultivars ; disease progression ; genetic resistance ; genetic variation ; heritability ; horizontal resistance ; mortality ; olives ; open pollination ; paternal effect ; seedling growth
    Language English
    Dates of publication 2021-0727
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10081534
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Identification of new polymorphic regions and differentiation of cultivated olives (Olea europaea L.) through plastome sequence comparison.

    Mariotti, Roberto / Cultrera, Nicolò G M / Díez, Concepcion Muñoz / Baldoni, Luciana / Rubini, Andrea

    BMC plant biology

    2010  Volume 10, Page(s) 211

    Abstract: Background: The cultivated olive (Olea europaea L.) is the most agriculturally important species of the Oleaceae family. Although many studies have been performed on plastid polymorphisms to evaluate taxonomy, phylogeny and phylogeography of Olea ... ...

    Abstract Background: The cultivated olive (Olea europaea L.) is the most agriculturally important species of the Oleaceae family. Although many studies have been performed on plastid polymorphisms to evaluate taxonomy, phylogeny and phylogeography of Olea subspecies, only few polymorphic regions discriminating among the agronomically and economically important olive cultivars have been identified. The objective of this study was to sequence the entire plastome of olive and analyze many potential polymorphic regions to develop new inter-cultivar genetic markers.
    Results: The complete plastid genome of the olive cultivar Frantoio was determined by direct sequence analysis using universal and novel PCR primers designed to amplify all overlapping regions. The chloroplast genome of the olive has an organisation and gene order that is conserved among numerous Angiosperm species and do not contain any of the inversions, gene duplications, insertions, inverted repeat expansions and gene/intron losses that have been found in the chloroplast genomes of the genera Jasminum and Menodora, from the same family as Olea.The annotated sequence was used to evaluate the content of coding genes, the extent, and distribution of repeated and long dispersed sequences and the nucleotide composition pattern. These analyses provided essential information for structural, functional and comparative genomic studies in olive plastids. Furthermore, the alignment of the olive plastome sequence to those of other varieties and species identified 30 new organellar polymorphisms within the cultivated olive.
    Conclusions: In addition to identifying mutations that may play a functional role in modifying the metabolism and adaptation of olive cultivars, the new chloroplast markers represent a valuable tool to assess the level of olive intercultivar plastome variation for use in population genetic analysis, phylogenesis, cultivar characterisation and DNA food tracking.
    MeSH term(s) DNA, Chloroplast ; DNA, Plant/genetics ; Gene Order ; Genome, Chloroplast ; Genome, Plant ; Microsatellite Repeats ; Olea/classification ; Olea/genetics ; Phylogeny ; Polymorphism, Genetic ; Sequence Analysis, DNA
    Chemical Substances DNA, Chloroplast ; DNA, Plant
    Language English
    Publishing date 2010-09-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1471-2229
    ISSN (online) 1471-2229
    DOI 10.1186/1471-2229-10-211
    Database MEDical Literature Analysis and Retrieval System OnLINE

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