scholarly journals USE OF INTERSPECIFIC HYBRIDIZATION IN THE BREEDING OF ADAPTIVE HYBRIDS AND SORTS OF GARDEN CHRYSANTHEMUM (Chrysanthemum morifolium Ramat.)

2018 ◽  
Vol 22 (4) ◽  
pp. 476-483
Author(s):  
A. I. Nedoluzhko
Keyword(s):  
Interspecific Hybridization ◽  
Wild Species ◽  
Selection Process ◽  
Chrysanthemum Morifolium ◽  
Winter Hardiness ◽  
Local Conditions ◽  
The World ◽  
Research Objects ◽  
Chrysanthemum Morifolium Ramat ◽  
Puccinia Horiana

Many garden chrysanthemums bred across the world are not fully winter hardy. Many are damaged by fungal diseases due to a high humidity and are late flowering. This makes them unsuitable for general commercial marketing. Since 2000 we have been conducting a breeding program using natural species of the genus Chrysanthemum that are adapted to the local conditions. The strategy of breeding adaptive hybrids and varieties of chrysanthemum native to Russia was proposed based on their biological, genetic peculiarities and natural resources of Chrysanthemum with the use of interspecific hybridization. Research objects are the first generations of interspecific hyb rids of F1obtained previously by the author as a result of the hybridization of varieties and wild species of Chrysanthemum. Derived from different species and varieties, F1hybrids were crossed among themselves to obtain the multicomponent F2progeny. F2seedlings with winter hardiness, resistance to Puccinia horiana Henn. and early flowering were used in closely related crosses. The offspring of F3from closely related crosses were also assessed and selected according to adaptive and decorative characteristics. Inclusion in the selection process of various sources of winter hardiness and resistance to P. horiana allowed positive characteristics to be increased in F2and to be revealed in F3. Adaptive signs of the wild species Chrysanthemum naktongense Nakai, C. coreanum (H. Lév. et Vaniot) Nakai, C. zawadzkii var. tenuisectum Kitag., C. leiophyllum Nakai, and C. zawadzkii subsp. acutilobum (DC.) Kitag., which have formed and fixed during evolution, were inherited and manifested in offspring of the multicomponent hybrids and the closely related crosses. Promising interspecific forms with biological signs determining the possibility of growing in extreme conditions of the subregion were selected.

scholarly journals The absence of the caffeine synthase gene is involved in the naturally decaffeinated status of Coffea humblotiana, a wild species from Comoro archipelago

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nathalie Raharimalala ◽  
Stephane Rombauts ◽  
Andrew McCarthy ◽  
Andréa Garavito ◽  
Simon Orozco-Arias ◽  
...  
Keyword(s):  
Wild Species ◽  
Illegitimate Recombination ◽  
Recombination Mechanism ◽  
Comparative Analyses ◽  
Robusta Coffee ◽  
Caffeine Synthase ◽  
The World ◽  
Decaffeinated Coffee ◽  
Chromosome Level

AbstractCaffeine is the most consumed alkaloid stimulant in the world. It is synthesized through the activity of three known N-methyltransferase proteins. Here we are reporting on the 422-Mb chromosome-level assembly of the Coffea humblotiana genome, a wild and endangered, naturally caffeine-free, species from the Comoro archipelago. We predicted 32,874 genes and anchored 88.7% of the sequence onto the 11 chromosomes. Comparative analyses with the African Robusta coffee genome (C. canephora) revealed an extensive genome conservation, despite an estimated 11 million years of divergence and a broad diversity of genome sizes within the Coffea genus. In this genome, the absence of caffeine is likely due to the absence of the caffeine synthase gene which converts theobromine into caffeine through an illegitimate recombination mechanism. These findings pave the way for further characterization of caffeine-free species in the Coffea genus and will guide research towards naturally-decaffeinated coffee drinks for consumers.

scholarly journals AGROCLIMATIC ZONING OF EUROPEAN AND ASIAN PEAR CULTIVARS WITH POTENTIAL FOR COMMERCIAL PLANTING IN SOUTHERN BRAZIL

2017 ◽  
Vol 39 (2) ◽  
Author(s):  
MARCOS SILVEIRA WREGE ◽  
IVAN DAGOBERTO FAORO ◽  
FLÁVIO GILBERTO HERTER ◽  
CRISTINA PANDOLFO ◽  
IVAN RODRIGUES DE ALMEIDA ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Climate Risk ◽  
Southern Brazil ◽  
Climatic Zones ◽  
Local Conditions ◽  
Asian Pear ◽  
Commercial Interest ◽  
The World ◽  
Chilling Hours ◽  
Production Problems

ABSTRACT Pear is among the fruits of major commercial interest in the world and one of the most imported in Brazil. Brazilian production is very small and the fruit quality is low, due to production problems. The success of culture in the country, among other factors, may be linked to the choice of cultivars, pollinating and rootstocks better adapted to local conditions, and thus depend on the particulars of an agricultural zoning. The aim of this study was to identify, in southern Brazil, homogeneous climatic zones with potential for growing of European and Asian pears, through climate risk studies. The regions were defined by the seasonal availability of chilling hours (<7.2 °C) accumulated during the period from May to September and the monthly risk of drought. The analysis allowed the recognition of four homogeneous areas for the production of pears in southern Brazil.

scholarly journals Algumas contribuições de Merleau-Ponty para a Psicologia em “Fenomenologia da percepção”

2009 ◽  
Vol 15 (1) ◽  
pp. 51-54
Author(s):  
Maria Virginia Filomena CREMASCO
Keyword(s):  
Selection Process ◽  
Assistant Professor ◽  
Doctoral Thesis ◽  
Theoretical Examination ◽  
Phenomenology Of Perception ◽  
The Social ◽  
The World ◽  
Human Understanding ◽  
Subject And Object ◽  
The Status

This essay consists of the author’s theoretical examination in the Selection Process of Assistant Professor for the Department of Psychology at the Federal University of Paraná, submitted in June, 2002. It succinctly presents contributions to psychology in Merleau-Ponty’s doctoral thesis of 1945, entitled “Phenomenology of Perception.” Merleau-Ponty sets out to discover original meanings as a road for perceiving human understanding. In his proposal, rationality takes on the status of science by preserving both subject and object. In other words, one finds in the world what it is fact and, on this basis, what perceptions can be confirmed or denied. Merleau-Ponty re-posits Husserl’s transcendental question: based on the natural and the social we discover the ambiguity of life, of being “in the” world and being “of the” world. We are questioned by it and we are free to choose. Contributions to psychology are discussed based on Merleau-Ponty’s perspective of the organization of the perspective field carried out by subject-body in situation.

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