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https://www.readbyqxmd.com/read/27905394/uvr2-ensures-transgenerational-genome-stability-under-simulated-natural-uv-b-in-arabidopsis-thaliana
#1
Eva-Maria Willing, Thomas Piofczyk, Andreas Albert, J Barbro Winkler, Korbinian Schneeberger, Ales Pecinka
Ground levels of solar UV-B radiation induce DNA damage. Sessile phototrophic organisms such as vascular plants are recurrently exposed to sunlight and require UV-B photoreception, flavonols shielding, direct reversal of pyrimidine dimers and nucleotide excision repair for resistance against UV-B radiation. However, the frequency of UV-B-induced mutations is unknown in plants. Here we quantify the amount and types of mutations in the offspring of Arabidopsis thaliana wild-type and UV-B-hypersensitive mutants exposed to simulated natural UV-B over their entire life cycle...
December 1, 2016: Nature Communications
https://www.readbyqxmd.com/read/27905150/genetic-parameter-estimates-for-prenatal-and-postnatal-mortality-in-nellore-cattle
#2
L C Magalhães Silva, F Baldi, C Aboujaoude, G C Venturini, L G Albuquerque, M J R Paranhos da Costa
The aim of this study was to estimate genetic parameters for prenatal (PRE) and postnatal (POS) mortality in Nellore cattle. A total of 13 141 (PRE) and 17 818 (POS) records from Nellore females were used. PRE and POS were recorded using binary scale scores: a score of '1' was given to calves that were born alive (PRE) and those that were alive at weaning (POS), and a score of '0' was given to calves that were not alive at or around birth (PRE), as well as to those weighed at birth but not at weaning (POS)...
December 1, 2016: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/27904954/the-mathematics-of-xenology-di-cographs-symbolic-ultrametrics-2-structures-and-tree-representable-systems-of-binary-relations
#3
Marc Hellmuth, Peter F Stadler, Nicolas Wieseke
The concepts of orthology, paralogy, and xenology play a key role in molecular evolution. Orthology and paralogy distinguish whether a pair of genes originated by speciation or duplication. The corresponding binary relations on a set of genes form complementary cographs. Allowing more than two types of ancestral event types leads to symmetric symbolic ultrametrics. Horizontal gene transfer, which leads to xenologous gene pairs, however, is inherent asymmetric since one offspring copy "jumps" into another genome, while the other continues to be inherited vertically...
November 30, 2016: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/27904806/dominance-relationships-in-a-family-pack-of-captive-arctic-wolves-canis-lupus-arctos-the-influence-of-competition-for-food-age-and-sex
#4
Simona Cafazzo, Martina Lazzaroni, Sarah Marshall-Pescini
BACKGROUND: Dominance is one of the most pervasive concepts in the study of wolf social behaviour but recently its validity has been questioned. For some authors, the bonds between members of wolf families are better described as parent-offspring relationships and the concept of dominance should be used just to evaluate the social dynamics of non-familial captive pack members (e.g., Mech & Cluff, 2010). However, there is a dearth of studies investigating dominance relationships and its correlates in wolf family packs...
2016: PeerJ
https://www.readbyqxmd.com/read/27904644/ambient-temperature-affects-postnatal-litter-size-reduction-in-golden-hamsters
#5
Sarah A Ohrnberger, Raquel Monclús, Heiko G Rödel, Teresa G Valencak
BACKGROUND: To better understand how different ambient temperatures during lactation affect survival of young, we studied patterns of losses of pups in golden hamsters (Mesocricetus auratus) at different ambient temperatures in the laboratory, mimicking temperature conditions in natural habitats. Golden hamsters produce large litters of more than 10 young but are also known to wean fewer pups at the end of lactation than they give birth to. We wanted to know whether temperature affects litter size reductions and whether the underlying causes of pup loss were related to maternal food (gross energy) intake and reproductive performance, such as litter growth...
2016: Frontiers in Zoology
https://www.readbyqxmd.com/read/27903872/egg-size-investment-in-superb-fairy-wrens-helper-effects-are-modulated-by-climate
#6
N E Langmore, L D Bailey, R G Heinsohn, A F Russell, R M Kilner
Natural populations might exhibit resilience to changing climatic conditions if they already show adaptive flexibility in their reproductive strategies. In cooperative breeders, theory predicts that mothers with helpers should provide less care when environmental conditions are favourable, but maintain high investment when conditions are challenging. Here, we test for evidence of climate-mediated flexibility in maternal investment in the cooperatively breeding superb fairy-wren Malurus cyaneus We focus on egg size because in this species egg size influences offspring size, and females reduce egg investment when there are helpers at the nest...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27903867/in-situ-developmental-responses-of-tropical-sea-urchin-larvae-to-ocean-acidification-conditions-at-naturally-elevated-pco2-vent-sites
#7
Miles D Lamare, Michelle Liddy, Sven Uthicke
Laboratory experiments suggest that calcifying developmental stages of marine invertebrates may be the most ocean acidification (OA)-sensitive life-history stage and represent a life-history bottleneck. To better extrapolate laboratory findings to future OA conditions, developmental responses in sea urchin embryos/larvae were compared under ecologically relevant in situ exposures on vent-elevated pCO2 and ambient pCO2 coral reefs in Papua New Guinea. Echinometra embryos/larvae were reared in meshed chambers moored in arrays on either venting reefs or adjacent non-vent reefs...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27903683/the-womb-environment-shapes-respiratory-health-in-offspring-a-fascinating-hypothesis
#8
EDITORIAL
Franca Rusconi
No abstract text is available yet for this article.
December 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/27903516/metabolic-abnormalities-and-obesity-s-impact-on-the-risk-for-developing-preeclampsia
#9
Frank T Spradley
Preeclampsia (PE), a hypertensive disorder of pregnancy, is increasing as a major contributor to perinatal and long-term morbidity of mother and offspring. PE is thought to originate from ischemic insults in the placenta driving the release of pro-hypertensive anti-angiogenic (sFlt-1) and pro-inflammatory (TNFα) factors into the maternal circulation. While the increased incidence of PE is hypothesized to be largely due to the obesity pandemic, the mechanisms whereby obesity increases this risk are unknown...
November 30, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27903325/the-impact-of-offspring-marital-status-on-depressive-symptoms-of-parents-findings-from-the-korean-longitudinal-study-of-aging
#10
Woorim Kim, Eun-Cheol Park, Kyu-Tae Han, Tae-Hoon Lee, Tae Hyun Kim
BACKGROUND: Noticeable demographic changes have taken place in South Korea, with the general marriage rate decreasing and the average first age at marriage and general divorce rate increasing. The shown trends have contributed to intergenerational discordance in the perception of familial values, which is important in addressing the psychological well-being of parents. This study aimed to investigate the association between the marital status of offspring aged 40 years and over and the depression levels of parents...
December 1, 2016: International Psychogeriatrics
https://www.readbyqxmd.com/read/27903323/reproductive-ecology-of-phorid-parasitoids-in-relation-to-the-head-size-of-leaf-cutting-ants-atta-sexdens-forel
#11
C F Farder-Gomes, M A Oliveira, P L Gonçalves, L M Gontijo, J C Zanuncio, M A L Bragança, E M Pires
The leaf-cutting ant Atta sexdens Forel (Hymenoptera: Formicidae) is one of the most damaging agricultural pests in the Neotropics. Management strategies predominantly rely on the use of general insecticides. What is needed are more species-specific and environmentally friendly options. Parasitioids such as phorid flies (Diptera: Phoridae) may be one such option, but a greater understanding of the ecology of the flies and their ant hosts is essential to devise biological control strategies. Here we report parasitism rates, ant host size, parasitoid abundance per host and resultant sex ratios of two phorid species Apocephalus attophilus Borgmeier and Eibesfeldtphora tonhascai Brown parasitizing A...
December 1, 2016: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/27902908/improved-performance-of-broilers-and-broiler-breeders-associated-with-an-amended-vaccination-program-against-reovirosis
#12
Peter De Herdt, Marlies Broeckx, Filip Van Driessche, Bart Vermeiren, Geert Van Den Abeele, Stefaan Van Gorp
A vertically integrated monitoring program was set up for breeders hatched in 2013 and their offspring to detect differences in performance related to the reovirus vaccination schedule. Within the same organization in Belgium, 17 breeder flocks were vaccinated with one dose of live and one dose of inactivated reovirus vaccine, while 14 flocks received two doses of inactivated vaccine without live priming. The hatchability of the eggs produced by these birds was examined. Further, the daily growth, feed conversion, mortality, slaughterhouse condemnation, production index, and antibiotic use were monitored in 110 broiler flocks derived from the breeders...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902751/exploration-of-a-polygenic-risk-score-for-alcohol-consumption-a-longitudinal-analysis-from-the-alspac-cohort
#13
Michelle Taylor, Andrew J Simpkin, Philip C Haycock, Frank Dudbridge, Luisa Zuccolo
BACKGROUND: Uncertainty remains about the true extent by which alcohol consumption causes a number of health outcomes. Genetic variants, or combinations of variants built into a polygenic risk score (PGRS), can be used in an instrumental variable framework to assess causality between a phenotype and disease outcome of interest, a method known as Mendelian randomisation (MR). We aimed to identify genetic variants involved in the aetiology of alcohol consumption, and develop a PGRS for alcohol...
2016: PloS One
https://www.readbyqxmd.com/read/27901312/female-white-footed-mice-peromyscus-leucopus-trade-off-offspring-skeletal-quality-for-self-maintenance-when-dietary-calcium-intake-is-low
#14
Christina M Schmidt, Wendy R Hood
During gestation and lactation in mammals, calcium and other minerals are transferred from female to offspring to support skeletal ossification. To meet mineral requirements, females commonly mobilize mineral from their own skeleton to augment dietary intake. Because the fitness costs of bone loss are expected to limit the amount of endogenous mineral that females transfer to their young, the amount of mineral allocated to offspring is predicted to be influenced by the availability of mineral in the female's diet...
November 30, 2016: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/27901293/live-birth-sex-ratios-and-father-s-geographic-origins-in-jerusalem-1964-1976
#15
J Groeger, M Opler, K Kleinhaus, M C Perrin, R Calderon-Margalit, O Manor, O Paltiel, D Conley, S Harlap, D Malaspina
OBJECTIVE: To examine whether ancestry influenced sex ratios of offspring in a birth cohort before parental antenatal sex selection influenced offspring sex. METHODS: We measured the sex ratio as the percent of males according to countries of birth of paternal and maternal grandfathers in 91,459 live births from 1964 to 1976 in the Jerusalem Perinatal Study. Confidence limits (CI) were computed based on an expected sex ratio of 1.05, which is 51.4% male. RESULTS: Of all live births recorded, 51...
November 30, 2016: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/27901266/maternal-prepregnancy-body-mass-index-and-offspring-attention-deficit-hyperactivity-disorder-a%C3%A2-quasi-experimental-sibling-comparison-population-based-design
#16
Erica D Musser, Michael T Willoughby, Suzanne Wright, Elinor L Sullivan, Diane D Stadler, Brent F Olson, Robert D Steiner, Joel T Nigg
BACKGROUND: High maternal prepregnancy body mass index (BMI) has been associated with increased risk of offspring attention-deficit/hyperactivity disorder (ADHD). However, whether this effect is attributable to maternal or familial level confounds has been little examined. METHODS: The present study sought to examine these associations, utilizing data from the medical records of a health care system which treats 350,000 patients annually and a sibling-comparison design in a sample of 4,682 children born to 3,645 mothers...
November 30, 2016: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/27900865/-treatment-of-dyslipidemia-is-here-still-place-for-cetp-inhibitors
#17
Ján Murín, Miroslav Pernický, Soňa Kiňová
In the treatment of dyslipidemias about 5-6 years back a new class of drugs emerged, CETP (cholesteryl ester transfer protein)-inhibitors. Their benefit was due to an increase of HDL-cholesterol (HDL-C) serum levels. This treatment mode was supported by epidemiological and clinical studies, as people with high serum HDL-C levels suffered less from cardiovascular (CV) events. Three studies with CETP inhibitors (ILLUMINATE with torcetrapib, dal-OUTCOMES with dalcetrapib and ACCELERATE with evacetrapib) were unfortunately negative, and torcetrapib was even harmful to patients due to an increase of aldosterone serum levels...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27900827/the-role-of-latitudinal-genetic-and-temperature-variation-in-the-induction-of-diapause-of-papilio-glaucus-lepidoptera-papilionidae
#18
Sean F Ryan, Patti Valella, Gabrielle Thivierge, Matthew L Aardema, J Mark Scriber
A key adaptation in insects for dealing with variable environmental conditions is the ability to diapause. The tiger swallowtail butterflies, Papilio glaucus and P. canadensis are ideal species to explore the genetic causes and population genetic consequences of diapause because divergence in this trait is believed to be a salient factor in maintaining a hybrid zone between these species. Yet little is known about the factors that influence diapause induction in this system. Here we explored how spatial (latitudinal), environmental (temperature) and genetic (hybridization) factors affect diapause induction in this system...
November 29, 2016: Insect Science
https://www.readbyqxmd.com/read/27900586/role-of-prolactin-in-promotion-of-immune-cell-migration-into-the-mammary-gland
#19
Riva Dill, Ameae M Walker
Immune cells in the mammary gland play a number of important roles, including protection against infection during lactation and, after passing into milk, modulation of offspring immunity. However, little is known about the mechanism of recruitment of immune cells to the lactating gland in the absence of infection. Given the importance of prolactin to other aspects of lactation, we hypothesized it would also play a role in immune cell recruitment. Prolactin treatment of adult female mice for a period equivalent to pregnancy and the first week of lactation increased immune cell flux through the mammary gland, as reflected in the number of immune cells in mammary gland-draining, but not other lymph nodes...
November 29, 2016: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/27900542/effects-of-parasitism-on-host-reproductive-investment-in-a-rodent-flea-system-host-litter-size-matters
#20
Elizabeth M Warburton, Irina S Khokhlova, Elizabeth M Dlugosz, Luther Van Der Mescht, Boris R Krasnov
Parents may alter offspring phenotype depending on the type of environment they encounter. Parasitism is a common stressor; therefore, maternal reproductive investment could change in response to parasitic infection. However, few experiments have investigated the relationship between parasitism and maternal investment, whereas earlier field studies provided contradictory evidence. We investigated number, sex ratio, and growth of offspring in two rodent species, solitary altricial Meriones crassus and social precocial Acomys cahirinus, exposed to parasitism by fleas Xenopsylla ramesis and Parapulex chephrenis...
November 29, 2016: Parasitology Research
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