Search results for "Tree"

Centennial olive trees as a reservoir of genetic diversity

2011

†Background and Aims Genetic characterization and phylogenetic analysis of the oldest trees could be a powerful tool both for germplasm collection and for understanding the earliest origins of clonally propagated fruit crops. The olive tree (Olea europaea L.) is a suitable model to study the origin of cultivars due to its long lifespan, resulting in the existence of both centennial and millennial trees across the Mediterranean Basin. †Methods The genetic identity and diversity as well as the phylogenetic relationships among the oldest wild and cultivated olives of southern Spain were evaluated by analysing simple sequence repeat markers. Samples from both the canopy and the roots of each tr…

RECOVERY AND CHARACTERIZATION OF THE CHESTNUT GERMPLASM ON THE WESTERN SLOPES OF THE ASPROMONTE IN SOUTHERN CALABRIA

2010

For a considerable period of time chestnuts were a fundamental source of food and economy for the people in the Aspromonte area. After decades in which chestnut cultivation has been neglected as a result of depopulation in mountainous zones, the production capacity in this area has reduced resulting in an erosion of the native germplasm. A survey has been carried out to improve the knowledge about the chestnut germplasm present in this area and to evaluate its qualities with the objective of preserving native genetic resources, safeguarding them from genetic erosion phenomenon and individuating local genotypes of market value which could be used to promote a re-launch of local chestnut cult…

Multifactorial combinations predicting active vs inactive stages of change for physical activity in adolescents considering built environment and psy…

2018

Evolutionary morphology in shape and size of haptoral anchors in 14 Ligophorus spp. (Monogenea: Dactylogyridae).

2017

The search for phylogenetic signal in morphological traits using geometric morphometrics represents a powerful approach to estimate the relative weights of convergence and shared evolutionary history in shaping organismal form. We assessed phylogenetic signal in the form of ventral and dorsal haptoral anchors of 14 species of Ligophorus occurring on grey mullets (Osteichthyes: Mugilidae) from the Mediterranean, the Black Sea and the Sea of Azov. The phylogenetic relationships among these species were mapped onto the morphospaces of shape and size of dorsal and ventral anchors and two different tests were applied to establish whether the spatial positions in the morphospace were dictated by …

First record of Temnosewellia minor (Platyhelminthes, Temnocephalidae) in Sicily, with a plea for a re-examination of the identity of the publicly av…

2021

Author(s): Vecchioni, Luca; Chirco, Pietro; Bazan, Giuseppe; Marrone, Federico; Arizza, Vincenzo; Arculeo, Marco | Abstract: Ectosymbiotic temnocephalan flatworms belonging to the genus Temnosewellia Damborenea and Cannon, 2001 were collected on Cherax destructor Clark, 1936 in an aquaculture farm in Sicily, Italy. This represents the first record of a temnocephalan species for the fauna of the island. Morphological and molecular identification of the collected specimens proved that they belong to the allochthonous species Temnosewellia minor Haswell, 1888, which was introduced along with crayfishes bred in aquaculture farms. The phylogenetic analyses carried out for the molecular identific…

Virtuālās realitātes iespējas (360 un 180 video un foto) kultūras mantojuma izzināšanā vidusskolā

2019

Maģistra darba mērķis ir izpētīt virtuālās realitātes (360 un 180 foto un video) piedāvātās iespējas kultūras mantojuma apzināšanās un arhitektūras stilu izpratnē vidusskolā, veicot pedagoģisku izmēģinājumdarbību ar virtuālās realitātes brillēm YouTube aplikācijas piedāvātajās 360 un 180 video iespējās un 360 un 180 foto panorāmu vietu reprezentācijā Google Street View un 360Cities platformās. Darba svarīgākais ieguvums ir konceptualizētas virtuālās realitātes (360 un 180 foto un video) iespējas kultūrmantojuma apzināšanās un izstrādāti ieteikumi pedagoģiskai pieejai darbam ar digitalizēto kultūras mantojumu kultūras jomas pedagogiem, darbojoties ar VR brillēm, viedtālruņiem, iepazīstoties …

Organ xenografting between rodents: an evolutionary perspective

1994

Rejection times of heart xenografts in several donor-recipient combinations including the guinea pig, rat, hamster, and mouse are examined in light of the paleontological history of rodents and the resulting phylogenetic distances between taxa. This multidisciplinary review at the molecular, chromosomal and morphological levels suggests that xenograft rejection time is inversely proportional to the time divergence or phylogenetic distance, and that the binomial terminology concordant/discordant does not reflect the amplitude of phylogenetic distances.

What grafting materials produce greater alveolar ridge preservation after tooth extraction? A systematic review and network meta-analysis

2021

Abstract A systematic review and network meta-analysis was conducted to compare different bone-substitute materials used for alveolar ridge preservation after tooth extraction. The electronic search was carried out on Embase, PubMed, Cochrane Library, Web of Science, Scopus, LILACS, and grey literature up to March 22, 2020 (registration number INPLASY202030005). Only randomized controlled trials were included to answer the following PICOS question: ‘What grafting materials produce greater alveolar ridge preservation after tooth extraction?’ The primary outcomes were the alveolar width resorption 1 mm below the alveolar crest and buccal height resorption in millimeters. Of the 4379 studies i…

On the Non-uniform Redundancy of Representations for Grammatical Evolution: The Influence of Grammars

2018

The representation used in grammatical evolution (GE) is non-uniformly redundant as some phenotypes are represented by more genotypes than others. This article studies how the non-uniform redundancy of the GE representation depends on various types of grammars. When constructing the phenotype tree from a genotype, the used grammar determines Bavg, the average branching factor. Bavg measures the expected number of non-terminals chosen when mapping one genotype codon to a phenotype tree node. First, the paper illustrates that the GE representation induces a bias towards small trees. This bias gets stronger with lower Bavg. For example, when using a grammar with Bavg = 0.5, 75% of all genotype…

Kernel-Based Inference of Functions Over Graphs

2018

Abstract The study of networks has witnessed an explosive growth over the past decades with several ground-breaking methods introduced. A particularly interesting—and prevalent in several fields of study—problem is that of inferring a function defined over the nodes of a network. This work presents a versatile kernel-based framework for tackling this inference problem that naturally subsumes and generalizes the reconstruction approaches put forth recently for the signal processing by the community studying graphs. Both the static and the dynamic settings are considered along with effective modeling approaches for addressing real-world problems. The analytical discussion herein is complement…