Presence/absence of a CACTA transposon in the CYC2c gene of two genotypes of Helianthus × multiflorus cv. “Meteor” characterized by a radiate inflorescence with different shape of disk flower corollas

Biologia ◽  
2019 ◽  
Vol 74 (12) ◽  
pp. 1675-1686 ◽  
Author(s):  
Marco Fambrini ◽  
Claudio Pugliesi
Keyword(s):  
Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 41-48
Author(s):  
I.V. Marin

SUMMARYThe aim of this work was to develop a simple method for calculating disk flower number and their density in sunflower head. The formula developed on the basis of the Golden section includes initial data of the number of smallshort rows and the number of florets in a row. It takes no more than a minute to gain initial data for calculating the formula for one head.


Genetika ◽  
2020 ◽  
Vol 52 (3) ◽  
pp. 911-923
Author(s):  
Nemanja Cuk ◽  
Sandra Cvejic ◽  
Velimir Mladenov ◽  
Brankica Babec ◽  
Vladimir Miklic ◽  
...  

Except agronomic important traits, great diversity in sunflower is present in morphological traits which are very useful in breeding studies. The main objective of the paper was to determine genetic diversity among the 110 inbred lines in the collection of Institute of Field and Vegetable Crops Novi Sad (IFVCNS) by screening 34 morphological traits according to a list of descriptors of the International Union for the Protection of New Varieties of Plants (UPOV) as to conduct the Distinctness, Uniformity and Stability Test (DUS). The diversity of morphological traits was estimated by Shannon diversity index (H?) and the diversity of sunflower inbred lines was performed by homogeneity analysis (HOMALS) as well as discriminatory power of the traits. The values of the traits in Shannon diversity index were the highest (H?=0.99) for height of the tip of the blade compared to insertion of petiole and bract position, while branching, head shape and seed color showed low diversity (H?>0.1). The uniformity of inbred lines distribution determined discriminative power of descriptors. Disk flower anthocyanin coloration of stigma, hypocotyl anthocyanin coloration and intensity, leaf blistering, leaf serration, seed stripes on and between the margins showed the strongest discriminatory power. According to these six traits, the collection of inbred lines was divided into two main groups and three subgroups which better explained the relationships among the various inbred lines. Inbred lines showed the great variability of morphological traits in the whole collection and also among the inbred lines from the same type of use.


Computer vision techniques plays an important role in extracting meaningful information from images. A process of extraction, analysis, and understanding of information from images may accomplished by an automated process using computer vision and machine learning techniques. The paper proposed a hybrid methodology using MKL – SVM with multi-label classification that is experimented on a dataset contained 25000 flower images of 102 different spices. Basic and morphology features including color, size, texture, petal type, petal count, disk flower, corona, aestivation of flower and flower class are extracted to increase the classification accuracy. Various classifiers are applied on extracted feature set and their performance are discussed. The result of MKL – SVM with multi-label classification is very promising with 76.92% as an accuracy rate. In brief, this paper attempts to explore a novel morphology for feature extraction and the applicability of symbolic representation schemes along with different classification strategies for effective multi-label classification of flower spices


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