Variation in Reproductive Phenology in a Pinus radiata D. Don Seed Orchard in Northern Spain

Summary Reproductive phenology was studied in a Pinus radiata seed orchard, located in northern Spain. Timing of flowering was determined on the basis of data recorded by visual observations made in 2000, 2001 and 2002. The genetic and environmental factors affecting female and male phenology, as well as reproductive synchronization, were studied. The dates of beginning of the receptive phase and pollen shedding varied greatly from year to year but the variation on the sum of degree-days was low. In general, the flowering periods of the different clones overlapped. The clonal differences in the phenology of receptivity and pollen shedding were in most cases statistically significant. The time needed to reach flowering stages was under strong genetic control. Genetic control was stronger for the female than the male flowering process. However, correlations between years were stronger for male than for female flowering phenology. The male flowering clones that best synchronized with the females appeared to be those that started flowering earlier. The phenological overlap index varied greatly among clones, whether male or female, and also among years.

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Anthesis, anther dehiscence, pistil receptivity and fruit development in the Longum group of Capsicum annuum

Australian Journal of Experimental Agriculture ◽

10.1071/ea99038 ◽

2000 ◽

Vol 40 (5) ◽

pp. 755 ◽

Cited By ~ 19

Author(s):

M. Aleemullah ◽

A. M. Haigh ◽

P. Holford

Keyword(s):

Seed Set ◽

Flowering Phenology ◽

Fruit Production ◽

Anther Dehiscence ◽

Horticultural Crop ◽

Flower Opening ◽

Endogenous Rhythms ◽

Factors Affecting ◽

Species Being ◽

Made In

Little attention has been paid to the events associated with fruit production such as flowering and seed set in chilli peppers despite this species being a major horticultural crop. To address this deficit, we examined flowering phenology in the cv. Red Hot Glory, a representative of the Longum group of peppers. Measurements of bud length and width showed that these characteristics can provide an effective index of the number of days required by a bud to reach anthesis. Anthesis itself mainly occurred during the morning with a second, smaller peak of flower opening in the afternoon. Measurements made in spring and summer suggested that the daily start of anthesis is controlled by daylength. In flowers that opened before 1700 hours, anther dehiscence took place 1 h after the buds opened; in flowers that opened later, dehiscence was delayed until the following morning. This pattern of anther dehiscence suggests that this event is partially controlled by the flower’s endogenous rhythms. Controlled pollinations showed that the period of female receptivity, as judged by seed set, lasted from 5 days before anthesis to 3 days after anthesis with maximum fertility occurring on the day of anthesis. Therefore, bud pollinations are possible, and, for maximum seed set, should be made as close to the day of anthesis as possible. This study has provided baseline data that will aid the production of new, hybrid cultivars and will facilitate further studies on the factors affecting fertility in this species.

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Variation in Floral Phenological Synchronization in a Clonal Seed Orchard of Pinus tabuliformis in Northeast of China

Silvae Genetica ◽

10.1515/sg-2012-0017 ◽

2012 ◽

Vol 61 (1-6) ◽

pp. 133-142 ◽

Cited By ~ 4

Author(s):

Wei Li ◽

Xiaoru Wang ◽

Yue Li

Keyword(s):

Genetic Control ◽

First Generation ◽

Seed Orchard ◽

Flowering Phenology ◽

Seed Orchards ◽

Clonal Seed Orchard ◽

Pinus Tabuliformis ◽

Seed Harvest ◽

Initial Seed ◽

Northeast Of China

Abstract Flowering phenology in an orchard is a crucial factor affecting the gene exchange among clones and consequently changing genetic composition of the seed crop. Pinus tabuliformis is now at the crucial period from first generation clonal seed orchards to advanced generation seed orchards in China. In this study, variation and stability in floral phenological synchronization of all the clones and possible mating pairs, in terms of an index of phenological overlap, were observed in a first generation clonal seed orchard which located in northeast of China. Results showed that significant variations occurred in the clones and mating pairs. This kind of variation was apparently related with temperature and humidity of the research site. With increasing age, levels of flowering synchronization were likely to rise in the clones and mating pairs. In general, the average flowering synchronization of male parents was slightly higher than that of female parents, female management in a seed orchard should be paied more attention. Flowering time was under strong genetic control and this genetic control was stronger in the female flowering process than of the males in terms of board sense heritability and year to year correlation analysis. Flowering synchronization of female parents was positively correlated between most years and can be a reliable reference for early and late predication in Pinus tabuliformis seed orchard during stage of initial seed harvest to stable seed production. According to their average levels of flowering synchronization, 49 clones in the first generation clonal seed orchard were divided into 11 different groups. Results of this paper provided the basic information for first generation seed orchard management and advanced seed orchard establishment of Pinus tabuliformis.

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Genetic Variation in Reproductive Traits in a Clonal Seed Orchard of Prunus avium in Northern Spain

Silvae Genetica ◽

10.1515/sg-2008-0017 ◽

2008 ◽

Vol 57 (1-6) ◽

pp. 110-118 ◽

Cited By ~ 1

Author(s):

R. Díaz ◽

E. Merlo

Keyword(s):

Genetic Variation ◽

Prunus Avium ◽

Reproductive Traits ◽

Seed Orchard ◽

Reproductive Phenology ◽

Broad Sense Heritability ◽

Northern Spain ◽

Flowering Stage ◽

Clonal Seed Orchard ◽

Northwestern Spain

AbstractIn the present study we investigated the reproductive phenology of Prunus avium in a seed orchard located in northwestern Spain. The study was carried out with 103 clones from 7 provenance regions in northern Spain. The most advanced flowering stage on different dates and the number of flowers and cherries were monitored over two consecutive years. Significant differences among clones were found for all of the studied traits, with high broad-sense heritability estimates for all, except duration of flowering and synchronization index, both of which showed moderate heritability. In general, there was good overall reproductive synchronization in the seed orchard, although two groups of clones were differentiated. Clones from two out of the seven populations studied flowered later and were less well synchronized. The clonal differentiation was correlated with geoclimatic variables, suggesting that clones from lower altitudes and higher temperatures tend to an earlier flowering.

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The Role of the Endothelium in Premature Atherosclerosis: Molecular Mechanisms

Current Medicinal Chemistry ◽

10.2174/0929867326666190911141951 ◽

2020 ◽

Vol 27 (7) ◽

pp. 1041-1051 ◽

Cited By ~ 1

Author(s):

Michael Spartalis ◽

Eleftherios Spartalis ◽

Antonios Athanasiou ◽

Stavroula A. Paschou ◽

Christos Kontogiannis ◽

...

Keyword(s):

Molecular Mechanisms ◽

Low Density Lipoprotein ◽

Critical Role ◽

Density Lipoprotein ◽

Number Of Genes ◽

Causes Of Mortality ◽

Artery Disease ◽

Genetic And Environmental Factors ◽

Made In

Atherosclerotic disease is still one of the leading causes of mortality. Atherosclerosis is a complex progressive and systematic artery disease that involves the intima of the large and middle artery vessels. The inflammation has a key role in the pathophysiological process of the disease and the infiltration of the intima from monocytes, macrophages and T-lymphocytes combined with endothelial dysfunction and accumulated oxidized low-density lipoprotein (LDL) are the main findings of atherogenesis. The development of atherosclerosis involves multiple genetic and environmental factors. Although a large number of genes, genetic polymorphisms, and susceptible loci have been identified in chromosomal regions associated with atherosclerosis, it is the epigenetic process that regulates the chromosomal organization and genetic expression that plays a critical role in the pathogenesis of atherosclerosis. Despite the positive progress made in understanding the pathogenesis of atherosclerosis, the knowledge about the disease remains scarce.

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Factors Affecting Students’ Choice for MBA Program in Kuwait Universities

International Journal of Business and Management ◽

10.5539/ijbm.v11n3p119 ◽

2016 ◽

Vol 11 (3) ◽

pp. 119 ◽

Cited By ~ 2

Author(s):

Abdullah AL-Mutairi ◽

Muna Saeid

Keyword(s):

Sources Of Information ◽

Mba Programs ◽

Factors Affecting ◽

Knowledge And Skills ◽

University Websites ◽

Mba Program ◽

Campus Visit ◽

Admission Requirements ◽

Structured Questionnaire ◽

Made In

The attempt is made in this study to identify students’ motives and reasons behind enrolling in a MBA program offered by universities operating in Kuwait. It also explores criterion used to select the program. To achieve these objectives, data were collected through a well-designed and structured questionnaire and pre-testing was carried out to examine the efficiency of the instrument. The study showed that the main reasons behind selecting the MBA program by students are to satisfy their personal concerns and improve their knowledge and skills. Moreover, the students used program alumni and campus visit as main sources of information followed by friends’ suggestions and university websites. When evaluating the MBA programs, the students cited overseas accreditation as the most used criteria followed by faculty reputation, institution reputation and admission requirements.

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HYGIENIC EVALUATION OF ILLUMINATION INDICES AND NON-IONIZING RADIATION AT EDUCATIONAL SITES OF HIGH SCHOOLS

Hygiene and Sanitation ◽

10.33029/0016-9900-2020-99-2-152-157 ◽

2020 ◽

Vol 99 (2) ◽

pp. 152-157

Author(s):

Elena Yu. Gorbatkova ◽

T. R. Zulkarnaev ◽

Z. A. Khusnutdinova ◽

U. Z. Ahmadullin ◽

A. A. Kazak ◽

...

Keyword(s):

Ionizing Radiation ◽

Educational Institutions ◽

Educational Organizations ◽

Higher Educational Institutions ◽

Factors Affecting ◽

Republic Of Bashkortostan ◽

Higher Educational ◽

The Republic ◽

The Government ◽

Made In

One of the significant factors affecting the condition of the students’ visual apparatus is an illumination level in the premises of educational organizations. Electromagnetic radiation arising from computers also has an essential influence on a state of health. Taking into account the urgency of this problem, an analysis of illumination indices and EM radiation was made in audiences of higher educational institutions of various profiles (Ufa, the Republic of Bashkortostan). The total number of illumination measurements was 3528. The measurement methods met the requirements of the interstate standard. According to the results of the illumination indices estimation in the studied universities, a significant deviation from the regulated norms was revealed: in 71.5% of the measurements the index was below the norm. It should be noted that indices differed significantly depending on the type of educational organization. The best situation is in the “Financial University under the Government of the Russian Federation,” where only 13.3% of the measurements are inconsistent with the normative indices. Pulsation coefficient also was determined. It turned out that 88.8% of the measurements do not correspond to the norm. The analysis of illumination measurements in computer classes was carried out. Only one-fifth of them in the computer table working area in the of the document placement corresponded to SanPin. An anonymous questionnaire was also organized for students from four leading universities in Ufa, the Republic of Bashkortostan. According to respondents’ answers, out of seven students, one was revealed to be suffering from myopia. On the basis of “Center for Hygiene and Epidemiology in the Republic of Bashkortostan”, a study of non-ionizing radiation from video terminals located in computer classes was made. 1145 measurements were made in 20 buildings of four universities studied. It was found out that the intensity of the electrostatic field did not meet the requirements of SanPiN in 5.7% of the measurements. Hygienic assessment of the environment of educational organizations of various profiles revealed a number of significant deviations from the regulated norms. The obtained results testify to the need to monitor the illumination and EMR indices both from the administration of higher education institutions and from teachers. Based on the results of the study, recommendations were prepared for the management of higher educational institutions in Ufa.

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ASSESSMENT OF THE INFLUENCE OF ABIOTIC FACTORS ON THE ENZYMATIVE ACTIVITY OF THE SOIL

ÈKOBIOTEH ◽

10.31163/2618-964x-2021-4-2-128-134 ◽

2021 ◽

Vol 4 (2) ◽

pp. 128-134

Author(s):

E.V. Tovstik ◽

◽

A.S. Olkova ◽

Keyword(s):

Enzymatic Activity ◽

Soil Solution ◽

Ph Value ◽

Abiotic Factors ◽

Inverse Correlation ◽

Invertase Activity ◽

Soil Environment ◽

Factors Affecting ◽

Activity Of Enzymes ◽

Made In

Аn attempt is made in this work to establish correlations between the level of enzymatic activity of the soil and factors of an abiotic nature. It was found that the activity of invertase and urease in the soils of more southern territories is higher than that of northern ones. In soils with a pH value of the soil environment close to neutral reaction, the level of enzymatic activity is higher than in more acidic ones. The most sensitive to soil acidity among the studied urease enzymes. In relation to zinc, an inverse correlation was established between its content in the soil and the level of invertase activity. According to the degree of resistance to salinity, the enzymes are arranged in the following order: catalase> invertase> urease. An increase in the mineralization of the soil solution leads to an increase in the activity of urease. Of the studied enzymes, the most labile are representatives of the class of hydrolases (invertase and urease), less labile are oxidoreductases (catalase). Thus, when diagnosing the state of the soil by the level of enzymatic activity, it is necessary to take into account the main abiotic factors affecting the activity of enzymes: the average annual air temperature; pH and mineralization of the soil solution; the content of substances that inhibit microorganisms and block exozymes.

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Genetic control of minks (Mustela vison Schreber) development. Communication 2. Factors affecting the deficiency in sapphire offspring of silver-blue females heterozygous by Aleutian gene

Biopolymers and Cell ◽

10.7124/bc.000455 ◽

1996 ◽

Vol 12 (6) ◽

pp. 57-62 ◽

Cited By ~ 1

Author(s):

Yu. V. Vagin

Keyword(s):

Genetic Control ◽

Mustela Vison ◽

Development Communication ◽

Factors Affecting

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Genetic and environmental factors affecting some measures of yield and fertility in a registered Canadian Holstein dairy herd in Iran

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200008462 ◽

2002 ◽

Vol 2002 ◽

pp. 190-190

Author(s):

Ali Toosi

Keyword(s):

Environmental Factors ◽

Genetic Parameters ◽

Dairy Herd ◽

Cattle Breeding ◽

Factors Affecting ◽

Lactation Curve ◽

Dairy Cattle Breeding ◽

Important Trait ◽

Genetic And Environmental Factors ◽

Production Characteristics

Milk production is the most important trait in dairy cattle breeding. Measures of additional traits are also important. Traits of lactation curve are important in their relation to production characteristics. The two major reasons for which dairy cows are disposed are fertility problems and low milk yield (Hansen et al.,1983). The objectives of this study were 1) To evaluate effects of some environmental factors on some measures of yield and fertility, and 2) To estimate genetic parameters for these traits applying REML procedures under sire model.

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