Создание исходного материала кабачка для селекции материнских линий женского типа цветения

2018 ◽  
Author(s):  
S.V. Kuzmin ◽  
A.V. Medvedev ◽  
A.F. Bukharov
Keyword(s):  
Source Material ◽  
High Expression ◽  
Female Type ◽  
Female Sex ◽  
Hereditary Factors ◽  
Female Flowers

Из обширного исходного материала выделено три половых типа кабачка. Для дифференциации использовано два показателя степени сексуализации: начало образования женских цветков и их количество. Усилению проявления женского типа цветения способствуют сложные скрещивания. Это обеспечивает объединение в одном генотипе различных наследственных факторов. Летний посев значительно снижает выраженность женского пола и позволяет выделить линии с гарантированно высокой экспрессией признака, имеющих от 25 % до 90 % женских растений.From the extensive source material, three sex types of squash are distinguished. For differentiation, two indicators of the degree of sexualization were used: the beginning of the formation of female flowers and their number. Enhancing the manifestation of the female type of flowering is facilitated by complex crossings. This ensures the unification of different hereditary factors in one genotype. Summer sowing significantly reduces the expression of the female sex and makes it possible to isolate lines with a guaranteed high expression of the trait having from 25% to 90% of female plants.

scholarly journals EVALUATION OF THE MATERNAL FORMS OF CUCUMBER HYBRIDS FOR OPEN GROUND IN TERMS OF THE DEGREE OF EXPRESSION OF THE FEMALE SEX

2018 ◽  
pp. 40-42
Author(s):  
I. B. Korottseva ◽  
S. N. Belov
Keyword(s):  
Seed Production ◽  
Hybrid Seed ◽  
Hybrid Seed Production ◽  
Labor Costs ◽  
Single Male ◽  
Female Type ◽  
Female Sex ◽  
Open Ground ◽  
Male Flowers ◽  
The Cost

Growing heterotic hybrids of cucumber on large areas is possible only if the production of their seeds does not require large additional labor costs in comparison with conventional varieties. Cleaning of maternal forms by flowering type – removal of plants of intermediate type of flowering and single male flowers on plants of predominantly female type requires considerable labor costs. Significantly simplifies and reduces the cost of hybrid seed production using maternal forms of female type that do not have male flowers. It is very important to create maternal forms with a consistently high female expression that do not respond to changing environmental conditions. This will allow hybrid seed production of cucumber not only in protected, but also in the open ground, which will significantly reduce the cost of production of seeds. The objective was to assess the maternal forms of the cucumber hybrids F1 Krepish (L-100), F1 Brunet (L-105), F1 Frant (L-290), F1 Krasotka (L-25) according to the female expression in the conditions of spring film greenhouses and open ground near Moscow. The open ground served as a provocative background for identifying the most stable in terms of the severity of the female sex lines. It was determined that the bee-polluted hybrids of the cucumber F1 Krepish and F1 Brunet are most suitable for conducting hybrid seed production in the open field, since their maternal forms need to be cleaned according to the blooming type less than others.

scholarly journals The Application Of PCR RAPD Technique In Determining Female Sex Of Kapulasan (Nepheleum Lapaceum Mutabile)

2019 ◽  
Vol 1 (2) ◽  
pp. 1-7
Author(s):  
Edi Wirman
Keyword(s):  
Early Detection ◽  
Simple Technique ◽  
Economic Value ◽  
Tropical Region ◽  
Female Sex ◽  
Horticultural Plants ◽  
Female Flowers ◽  
Research Show

Kapulasan is one of horticultural plants derived from tropical region that has significant economic value. One of the obstacles in cultivating the plant is that kapulasan has flowering type of androdioceus, i.e. the male and the female flowers are separated. Female flowers produce hermaphroditic flowers that can produce fruits while the male ones will not produce fruits. In the cultivation of the plant, it is very difficult to determine the female flowers if they are propagated by seeds. It takes up to 7 years to determine the nature of the flowering. One of the important steps that can be done is through a system of early detection using molecular marks. RAPD technique as a simple technique can be used to distinguish the characteristics. The results of the research show that of the 250 primers used, the OPM-09 primer produces female sex bands related to the controller of the female kapulasan plants of which the ribbon produced is 512 bp in size.

scholarly journals SELECTION TO FEMALE TYPE OF FLOWERING OF CUCUMBER HYBRIDS FOR THE WINTER GREENHOUSES

2018 ◽  
pp. 18-22
Author(s):  
I. B. Korottseva ◽  
L. A. Kochetkova
Keyword(s):  
The State ◽  
F1 Hybrids ◽  
Female Type ◽  
Female Sex ◽  
Male Type ◽  
Sex Type ◽  
Cultivation Technology ◽  
Low Volume ◽  
Predominantly Female ◽  
Variety Testing

The possibility of obtaining parthenocarpic hybrids of the female F1 cucumber type in combination with paternal forms of various sexual types – intermediate and predominantly female – has been studied. The research was carried out for four years – 2015-2018, in the winter greenhouse of the "Richelieu" type, in the winterspring turnover, with low-volume cultivation technology. In the competitive and preliminary tests, more than 100 promising hybrid combinations were studied. As a result of the research, it was revealed that the sexual type of perspective parthenocarpic cucumber hybrids for the winter-spring rotation depends on the genotype of the original parental forms. The use of predominantly female-type flowering as paternal forms led to an increase in the female F1 hybrids. In a combination of maternal female-type forms with male-type paternal forms, hybrids of the female sex-type cucumber were obtained, but much less frequently than from crossing with the predominantly female types of flowering. According to the results of the competitive variety testing, two promising hybrids of the cucumber – Murava F1 and Vera F1 were transferred to the state variety testing in 2017. These hybrids were created using the paternal forms of a predominantly female type of flowering.

scholarly journals Breathlessness across generations: results from the RHINESSA generation study

Thorax ◽  
2021 ◽  
pp. thoraxjnl-2021-217271
Author(s):  
Magnus Ekström ◽  
Ane Johannessen ◽  
Michael J Abramson ◽  
Bryndis Benediktsdottir ◽  
Karl Franklin ◽  
...  
Keyword(s):  
Lung Function ◽  
Respiratory Health ◽  
Study Data ◽  
Activity Level ◽  
Northern Europe ◽  
Current Smoking ◽  
Multiple Factors ◽  
Female Sex ◽  
Lower Lung ◽  
Hereditary Factors

BackgroundBreathlessness is a major cause of suffering and disability globally. The symptom relates to multiple factors including asthma and lung function, which are influenced by hereditary factors. No study has evaluated potential inheritance of breathlessness itself across generations.MethodsWe analysed the association between breathlessness in parents and their offspring in the Respiratory Health in Northern Europe, Spain and Australia generation study. Data on parents and offspring aged ≥18 years across 10 study centres in seven countries included demographics, self-reported breathlessness, asthma, depression, smoking, physical activity level, measured Body Mass Index and spirometry. Data were analysed using multivariable logistic regression accounting for clustering within centres and between siblings.ResultsA total of 1720 parents (mean age at assessment 36 years, 55% mothers) and 2476 offspring (mean 30 years, 55% daughters) were included. Breathlessness was reported by 809 (32.7%) parents and 363 (14.7%) offspring. Factors independently associated with breathlessness in parents and offspring included obesity, current smoking, asthma, depression, lower lung function and female sex. After adjusting for potential confounders, parents with breathlessness were more likely to have offspring with breathlessness, adjusted OR 1.8 (95% CI 1.1 to 2.9). The association was not modified by sex of the parent or offspring.ConclusionParents with breathlessness were more likely to have children who developed breathlessness, after adjusting for asthma, lung function, obesity, smoking, depression and female sex in both generations. The hereditary components of breathlessness need to be further explored.

Female sex steroid induced gallbladder epithelium changes and gallstone deposits in female hamsters: TEM and SEM aspects

1993 ◽  
Vol 51 ◽  
pp. 354-355
Author(s):  
S. Karkare ◽  
J. Gilloteaux ◽  
T. R. Kelly
Keyword(s):  
Hormone Receptors ◽  
Corn Oil ◽  
Estrogen Therapy ◽  
Gallstone Formation ◽  
The United States ◽  
Sex Steroid ◽  
Estradiol Valerate ◽  
Surface Epithelium ◽  
Female Sex ◽  
Purina Chow

Approximately 1 million people in the United States alone develop gallstones each year. The incidence is higher in women than in men and the ratio being 4 ≥ 1. A correlation has also been suggested between oral contraceptives and cholelithiasis. In addition, postmenopausal or cancer estrogen therapy has been reported to be a factor responsible for gallstone formation. Female sex hormone receptors have been detected not only in the gallbladder musculature, but also in its epithelium. As a follow up to experiments effectuated in the male and the ovariectomized Syrian hamster, this report shows that, a combination of a low cholesterol diet with female sex steroid treatment contributes to the formation of gallstone-like deposits, while modifying the surface epithelium morphology. Syrian hamsters (F1B strain, BioBreeders, Watertown MA) were housed under 12h light: 12 h dark cycle, at 20 °C, fed Purina chow and water ad libitum. Several duration/treatment groups were studied, but this report will focus on data obtained with the group injected weekly with estradiol valerate (E weekly, s.c. 8-10 μg/100 g.b.w., in corn oil) and with i.m. medroxyprogesterone acetate (DepoProvera Upjohn Co., Kalamazoo, MI; 8-10 mg/100 g.b.w.) for a 3-month period. Other parameters (blood and bile) were also studied but not reported here.

Clinical factors correlated with vitamin D deficiency in patients with obesity scheduled for bariatric surgery: A single center experience

2020 ◽  
Vol 90 (3-4) ◽  
pp. 346-352
Author(s):  
Vincenzo Pilone ◽  
Salvatore Tramontano ◽  
Carmen Cutolo ◽  
Federica Marchese ◽  
Antonio Maria Pagano ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Serum Vitamin ◽  
Inverse Correlation ◽  
Model Assessment ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
Female Sex ◽  
Vitamin D Levels

Abstract. We aim to assess the prevalence of vitamin D deficiency (VDD) in patients scheduled for bariatric surgery (BS), and to identify factors that might be associated with VDD. We conducted a cross-sectional observational study involving all consecutive patients scheduled for BS from 2017 to 2019. The exclusion criteria were missing data for vitamin D levels, intake of vitamin D supplements in the 3 months prior to serum vitamin D determination, and renal insufficiency. A total of 206 patients (mean age and body mass index [BMI] of 34.9 ± 10.7 years, and 44.3 ± 6.99 kg/m2, respectively) met the inclusion criteria and were enrolled for data analysis. VDD (<19.9 ng/mL), severe VDD (<10 ng/mL), and vitamin D insufficiency (20–29.9 ng/mL) were present in 68.8 %, 12.5 %, and 31.2 % of patients, respectively. A significant inverse correlation was found between vitamin D levels and initial BMI, parathyroid hormone, and homeostatic model assessment of insulin resistance (r = −0.280, p < 0.05; r = −0.407, p = 0.038; r = −0.445, p = 0.005), respectively. VDD was significantly more prevalent in patients with higher BMI [−0.413 ± 0.12, CI95 % (−0.659; −0.167), p = 0.006], whereas no significant association between hypertension [−1.005 ± 1.65, CI95 % (−4.338; 2.326), p = 0.001], and diabetes type 2 (T2D) [−0.44 ± 2.20, CI95 % (−4.876; 3.986), p = 0.841] was found. We observed significant association between female sex and levels of vitamin D [6.69 ± 2.31, CI95 % (2.06; 11.33), p = 0.006]. The present study shows that in patients scheduled for BS, VDD deficiency is common and was associated with higher BMI, and female sex.

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