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https://www.readbyqxmd.com/read/28922764/a-pentatricopeptide-repeat-protein-restores-nap-cytoplasmic-male-sterility-in-brassica-napus
#1
Zhi Liu, Faming Dong, Xiang Wang, Tao Wang, Rui Su, Dengfeng Hong, Guangsheng Yang
Two forms of male-sterile cytoplasm, designated nap and pol, are found in the oilseed rape species, Brassica napus. The nap cytoplasm is observed in most B. napus varieties, and it confers male sterility on a limited number of cultivars that lack the corresponding restorer gene, Rfn. In the present study, using linkage analysis in combination with 5652 BC1 progeny derived from a cross between a nap cytoplasmic male sterility (CMS) line 181A and a restorer line H5, we delimited the Rfn gene to a 10.5 kb region on chromosome A09, which contained three putative ORFs...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28922610/symbiosis-of-selected-rhizobium-leguminosarum-bv-viciae-strains-with-diverse-pea-genotypes-effects-on-biological-nitrogen-fixation
#2
Chao Yang, Rosalind Bueckert, Jeff Schoenau, Axel Diederichsen, Hossein Zakeri, Thomas Warkentin
Biological nitrogen fixation (BNF) can be improved by optimizing the interaction between the rhizobial inoculant and pea (Pisum sativum L.), leading to increased productivity and reduced nitrogen (N) fertilizer use. Eight Rhizobium leguminosarum bv. viciae strains were used to inoculate super-nodulating pea mutant Rondo-nod3(fix+), hyper-nodulating pea mutant Frisson P88 Sym29, CDC Meadow commercial control, and a non-nodulating mutant Frisson P56 (nod-) to evaluate BNF in a greenhouse assay. Significant differences in strain×cultivar interactions were detected for shoot and root dry weight which ranged from 1...
September 18, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28921808/long-term-agricultural-management-does-not-alter-the-evolution-of-a-soybean-rhizobium-mutualism
#3
Jennifer E Schmidt, Dylan J Weese, Jennifer A Lau
Leguminous crops, like soybeans, often rely on biologically fixed nitrogen via their symbiosis with rhizobia rather than synthetic nitrogen inputs. However, agricultural management practices may influence the effectiveness of biological nitrogen fixation. While the ecological effects of agricultural management on rhizobia have received some attention, the evolutionary effects have been neglected in comparison. Resource mutualism theory predicts that evolutionary effects are likely, however. Both fertilization and tillage are predicted to cause the evolution of rhizobia that provide fewer growth benefits to plant hosts and fix less nitrogen...
September 16, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28921801/complications-symptoms-quality-of-life-and-pregnancy-in-cholestatic-liver-disease
#4
Kais Zakharia, Anilga Tabibian, Keith D Lindor, James H Tabibian
Cholestatic liver diseases (CLDs) encompass a variety of disorders of bile formation and/or flow which generally result in progressive hepatobiliary injury and ultimately end-stage liver disease. Many patients with CLD are diagnosed between the ages of 20-50 years, a particularly productive period of life professionally, biologically, and in other respects; it is not surprising, thus, that CLD is often associated with impaired health-related quality of life (HRQOL) and uncertainty regarding implications for and outcomes of pregnancy...
September 18, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28921784/the-evolution-of-gonad-expenditure-and-gonadosomatic-index-gsi-in-male-and-female-broadcast-spawning-invertebrates
#5
Geoff A Parker, Steven A Ramm, Jussi Lehtonen, Jonathan M Henshaw
Sedentary broadcast-spawning marine invertebrates, which release both eggs and sperm into the water for fertilization, are of special interest for sexual selection studies. They provide unique insight into the early stages of the evolutionary succession leading to the often-intense operation of both pre- and post-mating sexual selection in mobile gonochorists. Since they are sessile or only weakly mobile, adults can interact only to a limited extent with other adults and with their own fertilized offspring...
September 18, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28921518/high-birth-rates-despite-easy-access-to-contraception-and-abortion-a-cross-sectional-study
#6
Helena Hognert, Finn Egil Skjeldestad, Kristina Gemzell-Danielsson, Oskari Heikinheimo, Ian Milsom, Øjvind Lidegaard, Ingela Lindh
INTRODUCTION: The aim was to describe and compare contraceptive use, fertility, birth and abortion rates in the Nordic countries. MATERIAL AND METHODS: National data on births, abortions, fertility rate (1975-2013), redeemed prescriptions of hormonal contraceptives and sales figures of copper intrauterine devices (2008-2013) among women 15-49 years of age in the Nordic countries were collected and analysed. RESULTS: Use of hormonal contraceptives and copper intrauterine devices varied between 31-44%...
September 16, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28921396/determination-of-dominant-sources-of-nitrate-contamination-in-transboundary-russian-federation-ukraine-catchment-with-heterogeneous-land-use
#7
Y Vystavna, D Diadin, V Grynenko, V Yakovlev, Y Vergeles, F Huneau, P M Rossi, J Hejzlar, K Knöller
Nitrate contamination of surface water and shallow groundwater was studied in transboundary (Russia/Ukraine) catchment with heterogeneous land use. Dominant sources of nitrate contamination were determined by applying a dual δ (15)N-NO3 and δ (18)O-NO3 isotope approach, multivariate statistics, and land use analysis. Nitrate concentration was highly variable from 0.25 to 22 mg L(-1) in surface water and from 0.5 to 100 mg L(-1) in groundwater. The applied method indicated that sewage to surface water and sewage and manure to groundwater were dominant sources of nitrate contamination...
September 18, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28920515/quality-of-life-in-women-of-reproductive-age-a-comparative-study-of-infertile-and-fertile-women-in-a-nigerian-tertiary-centre
#8
Olusola Peter Aduloju, Oluwole Dominic Olaogun, Tolulope Aduloju
The study examined the quality of life in women of reproductive age and the aim was to evaluate and compare the quality of life (QoL) scores among fertile and infertile women. A cross-sectional study was carried out among women attending the Gynaecology and Postnatal Clinics of Ekiti State University Teaching Hospital comparing their QoL using the World Health Organisation Quality of Life-BREF (WHOQOL-BREF) questionnaire. The age of fertile women was significantly higher than the age of infertile women (p < ...
September 18, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28920413/functional-role-of-forskolin-and-pd166285-in-the-development-of-denuded-mouse-oocytes
#9
Hongguo Cao, Yani Bian, Fei Zhang, Yunshu Tang, Caixia Li, Jiemei Chen, Xiaorong Zhang
Objective: cAMP and MPF play critical roles during the maturation of mammalian oocytes. The aim of this study was to produce the offspring from denuded oocytes in mice by regulating cAMP and MPF. Methods: In this study, we used DOs at the germinal vesicle (GV) stage in mice and regulated levels of cAMP and MPF in DOs by adding Forskolin and PD166285 during in vitro maturation (IVM) without FSH and LH respectively. Results: Combined use of 50 μM Forskolin for 3 h and 2...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28920410/effect-of-seasonal-changes-on-fertility-parameters-of-holstein-dairy-cow-in-subtropical-climate-of-taiwan
#10
Wen Bor Liu, Huo Cheng Peh, Chien Kai Wang, Mancoba Christopher Mangwe, Chih Feng Chen, Hsin I Chiang
Objective: The purpose of this retrospective study was to investigate the relationship between temperature-humidity index (THI), season, and conception rate (CR) of Holstein cows in central Taiwan. Methods: The mean performance and number of observations were statistically evaluated for various parameters, including age at first service, number of days open, gestation length, CR, and calving interval for different parities. Results: The results indicate that the mean age at first service was 493...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28919973/study-of-male-mediated-gene-flow-across-a-hybrid-zone-in-the-common-shrew-sorex-araneus-using-y-chromosome
#11
Andrei V Polyakov, Viktor V Panov
Despite many studies, the impact of chromosome rearrangements on gene flow between chromosome races of the common shrew (Sorex araneus Linnaeus, 1758) remains unclear. Interracial hybrids form meiotic chromosome complexes that are associated with reduced fertility. Nevertheless comprehensive investigations of autosomal and mitochondrial markers revealed weak or no barrier to gene flow between chromosomally divergent populations. In a narrow zone of contact between the Novosibirsk and Tomsk races hybrids are produced with extraordinarily complex configurations at meiosis I...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919900/preliminary-studies-to-characterize-the-temporal-variation-of-micronutrient-composition-of-the-above-ground-organs-of-maize-and-correlated-uptake-rates
#12
Karla Vilaça Martins, Durval Dourado-Neto, Klaus Reichardt, Quirijn de Jong van Lier, José Laércio Favarin, Felipe Fadel Sartori, Guilherme Felisberto, Simone da Costa Mello
The improvement of agronomic practices and the use of high technology in field crops contributes for significant increases in maize productivity, and may have altered the dynamics of nutrient uptake and partition by the plant. Official recommendations for fertilizer applications to the maize crop in Brazil and in many countries are based on critical soil nutrient contents and are relatively outdated. Since the factors that interact in an agricultural production system are dynamic, mathematical modeling of the growth process turns out to be an appropriate tool for these studies...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28919821/prevalence-of-fertility-desire-and-its-associated-factors-among-15-to-49-year-old-people-living-with-hiv-aids-in-addis-ababa-ethiopia-a-cross-sectional-study-design
#13
Takele Menna Adilo, Hirut Megerssa Wordofa
BACKGROUND: The magnitude of unprotected sex to satisfy the desire for fertility among people living with HIV/AIDS (PLHIV) may rise more due to the availability of antiretroviral therapy (ART) in most HIV-affected countries. This could, however, have the risk of passing on HIV to sexual partners and children. The aim of this study, therefore, was to determine the magnitude and factors associated with the fertility desire of reproductive-age PLHIV in Addis Ababa, Ethiopia, for research-based and timely actions...
2017: HIV/AIDS: Research and Palliative Care
https://www.readbyqxmd.com/read/28919554/revisiting-the-wandering-womb-oxytocin-in-endometriosis-and-bipolar-disorder
#14
REVIEW
Natalie L Dinsdale, Bernard J Crespi
Hippocrates attributed women's high emotionality - hysteria - to a 'wandering womb'. Although hysteria diagnoses were abandoned along with the notion that displaced wombs cause emotional disturbance, recent research suggests that elevated levels of oxytocin occur in both bipolar disorder and endometriosis, a gynecological condition involving migration of endometrial tissue beyond the uterus. We propose and evaluate the hypothesis that elevated oxytocinergic system activity jointly contributes to bipolar disorder and endometriosis...
September 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28919321/clinicopathological-pattern-and-outcome-of-pediatric-malignant-ovarian-germ-cell-tumors-south-egypt-cancer-institute-experience
#15
Amany Ali, Heba Sayed, Mohamed Salem, Mohamed Hamdy, Amro Farok
BACKGROUND: Malignant ovarian germ cell tumors (MOGCTs) are rare and represent 1-1.5% of all cancers in children and adolescents. The aim of this study is to analyze the clinicopathological pattern at presentation and management and outcome of MOGCTs in children and adolescents. PATIENTS AND METHODS: Retrospective study included all girls diagnosed with MOGCTs between January 2005 and January 2015 in Pediatric and Surgical Oncology Departments at South Egypt Cancer Institute, Assiut University...
September 1, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28919297/androgens-and-endometrium-new-insights-and-new-targets
#16
REVIEW
Ioannis Simitsidellis, Philippa T K Saunders, Douglas A Gibson
Androgens are synthesised in both the ovary and adrenals in women and play an important role in the regulation of female fertility, as well as in the aetiology of disorders such as polycystic ovarian syndrome, endometriosis and endometrial cancer. The endometrium is an androgen target tissue and the impact of AR-mediated effects has been studied using human endometrial tissue samples and rodent models. In this review we highlight recent evidence that endometrial androgen biosynthesis and intracrine action is important in preparation of a tissue microenvironment that can support implantation and establishment of pregnancy...
September 15, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28919239/effect-of-micronutrient-supplementation-on-ivf-outcomes-a-systematic-review-of-the-literature
#17
REVIEW
Samuel Kofi Arhin, Yu Zhao, XiaoSheng Lu, Mandika Chetry, JieQiang Lu
There is accumulating evidence on the importance of micronutrients in improving fertility in couples undergoing IVF therapy. Despite this, studies reporting the relevant clinical outcomes of IVF, such as pregnancy and live birth rates, are very scarce. This review aimed to systematically summarize clinical evidence on the effect of micronutrients on primary outcome parameters of IVF treatment. The literature was searched up to February 2017 through Embase and PubMed databases for relevant studies. The quality of eligible studies was assessed with the Downs and Black checklist...
August 30, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28919118/global-regional-and-national-disability-adjusted-life-years-dalys-for-333-diseases-and-injuries-and-healthy-life-expectancy-hale-for-195-countries-and-territories-1990-2016-a-systematic-analysis-for-the-global-burden-of-disease-study-2016
#18
(no author information available yet)
BACKGROUND: Measurement of changes in health across locations is useful to compare and contrast changing epidemiological patterns against health system performance and identify specific needs for resource allocation in research, policy development, and programme decision making. Using the Global Burden of Diseases, Injuries, and Risk Factors Study 2016, we drew from two widely used summary measures to monitor such changes in population health: disability-adjusted life-years (DALYs) and healthy life expectancy (HALE)...
September 16, 2017: Lancet
https://www.readbyqxmd.com/read/28919117/global-regional-and-national-incidence-prevalence-and-years-lived-with-disability-for-328-diseases-and-injuries-for-195-countries-1990-2016-a-systematic-analysis-for-the-global-burden-of-disease-study-2016
#19
(no author information available yet)
BACKGROUND: As mortality rates decline, life expectancy increases, and populations age, non-fatal outcomes of diseases and injuries are becoming a larger component of the global burden of disease. The Global Burden of Diseases, Injuries, and Risk Factors Study 2016 (GBD 2016) provides a comprehensive assessment of prevalence, incidence, and years lived with disability (YLDs) for 328 causes in 195 countries and territories from 1990 to 2016. METHODS: We estimated prevalence and incidence for 328 diseases and injuries and 2982 sequelae, their non-fatal consequences...
September 16, 2017: Lancet
https://www.readbyqxmd.com/read/28919116/global-regional-and-national-age-sex-specific-mortality-for-264-causes-of-death-1980-2016-a-systematic-analysis-for-the-global-burden-of-disease-study-2016
#20
(no author information available yet)
BACKGROUND: Monitoring levels and trends in premature mortality is crucial to understanding how societies can address prominent sources of early death. The Global Burden of Disease 2016 Study (GBD 2016) provides a comprehensive assessment of cause-specific mortality for 264 causes in 195 locations from 1980 to 2016. This assessment includes evaluation of the expected epidemiological transition with changes in development and where local patterns deviate from these trends. METHODS: We estimated cause-specific deaths and years of life lost (YLLs) by age, sex, geography, and year...
September 16, 2017: Lancet
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