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Nomenclatura Unesco > (24) Ciencias de la Vida > (2409) Genética
(2409.01) Embriología (2409.02) Ingeniería genética
(2409.03) Genética de poblaciones (2409.90) Citogenética animal
(2409.91) Genética del desarrollo (2409.92) Genética molecular de plantas
(2409.93) Genética molecular (2409.94) Genética molecular de levaduras
(2409.99) Otras (especificar)

Categorías relacionadas:
(3201.02) Genética clínica (2410.07) Genética humana
(2407.02) Citogenética

Mostrando recursos 1 - 20 de 303,093

1. FACTORS AFFECTING MILK PRODUCTION TRAITS OF SAANEN GOAT RAISED UNDER SUDAN - SEMI ARID CONDITIONS - I.A. ISHAG; S.A. ABDALLA; M-K.A. AHMED
The aim of this study is to investigate the genetic and environmental factors affecting milk production characteristics of Saanen goats raised under Sudan conditions. It also aims at estimating heritabilities, phenotypic, genetic and environmental correlations among milk production traits. Means for total milk yield, lactation length and daily milk were 340.78±11.35 kg, 203.99±7.66 days and 1.50±0.05 kg, respectively. The season, year of calving and parity number had significant influence on total milk yield and daily milk yield. The lactation length was significantly (P<0.05) affected by season, year of kidding and origin of birth, and was insignificantly (P>0.05) influenced by parity...

2. INFLUENCE OF SOME MAJOR GENES ON EARLY LAY TRAITS OF CROSSBRED LOCAL PULLETS IN A HUMID TROPICAL ENVIRONMENT - U.K. OKE
The study evaluated the effect of some major genes on early lay characteristics of Nigerian local pullets in randomized complete block design experiment. A total of 210 day-old crossbred local chicken were generated from a main and reciprocal crossing of local chickens possessing some major genes (naked-neck (Na), frizzle (F), and normal feathered genes (na). Results indicate that feed per hen, feed per dozen egg, and percent hen-day production did not differ significantly (P>0.05) among the genotypes. However, significant difference (P<0.05) were observed in body weight at first egg, age at first egg , age at sexual maturity, weight of...

3. REPRODUCTIVE PERFORMANCES OF FOGERA CATTLE AT METEKEL CATTLE BREEDING AND MULTIPLICATION RANCH, NORTH WEST RTHIOPIA - M. MENALE; Z. MEKURIAW; G. MEKURIAW; M. TAYE
The study was conducted to evaluate the reproductive performance and to asses non-genetic factors affecting the reproductive performance of Fogera cattle breed kept at Metekel ranch. For this purpose data collected from 1996 to 2008 in the ranch were used. The data were analyzed using the general linear model procedures of statistical analysis system. The effect of mating system, parity of dam, year of birth and calving, season of birth and calving, sex of calf, and sire breed were considered as fixed effects for evaluating different reproductive parameters. The overall least square means for number of services per conception (NSP),...

4. Molecular Biology of Pancreatic Cancer: How Useful Is It in Clinical Practice? - George H Sakorafas; Vasileios Smyrniotis
Context During the recent two decades dramatic advances of molecular biology allowed an in-depth understanding of pancreatic carcinogenesis. It is currently accepted that pancreatic cancer has a genetic component. The real challenge is now how these impressive advances could be used in clinical practice. Objective To critically present currently available data regarding clinical application of molecular biology in pancreatic cancer. Methods Reports about clinical implications of molecular biology in patients with pancreatic cancer were retrieved from PubMed. These reports were selected on the basis of their clinical relevance, and the data of their publication (preferentially within the last 5 years)....

5. Vectorized quadrant model simulation and spatial control of Advanced Heavy Water Reactor - Swetha R Kumar
This paper describes a method to develop a vectorized nonlinear quadrant model and controller design to achieve spatial stability of Advanced Heavy Water Reactor (AHWR) core. The AHWR is a 920MWth, heavy water moderated, boiling light water cooled natural circulation reactor. Reactor core of AHWR is fictitiously divided into 17 non-overlapping nodes to ensure spatial stability. The non-linear coupled core neutronics - thermal hydraulics model of AHWR core is represented by 90 first order differential equations. The total reactor power and 17 nodal powers are controlled by manipulating four voltage signals to the Regulating Rods (RRs). It is necessary to...

6. STUDY ON REPRODUCTIVE TRAITS OF TWO BREEDS OF PARENT STOCK (FEMALE BREEDERS) IN THE HUMID ZONE OF NIGERIA - S.O. OLAWUMI; A.E. SALAKO
This study was carried out to assess the reproductive traits of White Plymouth Rock (WPR) and Barred Plymouth Rock (BPR) parent stock reared under similar housing, management and agro-climatic conditions and the traits considered are fertility and hatchability. Total fertile eggs produced by WPR and BPR are 1,763,322 eggs and 1,732,966 eggs respectively during the observed period (2002-2005). The analyzed data showed that breed has no significant (P>0.05) effect on fertility regardless of the batch of breeder hens. WPR and BPR genotypes recorded 3.84±0.04 eggs and 3.80±0.04 eggs/hen/week respectively and were similar. Batch has highly significant (P<0.01) effect on fertility...

7. ADAPTABILITY AND PRODUCTIVITY OF WASHERA RAMS AND ITS CROSSES WITH FARTA SHEEP IN SOUTH GONDER ZONE OF AMHARA REGION, ETHIOPIA - Mengistie TAYE; Asresu YITAYEW; Shigdaf MEKURIAW; Addisu BITEW
A rapid survey was conducted in south Gonder zone districts to collect information on the adaptability and productivity of distributed Washera rams and its crosses under smallholder farmer’s management systems in the study areas. Pre-survey information was collected from zone agricultural office professionals and checklist was used to collect information from zone and district professionals, development agents and smallholder farmers. In addition, physical observation and body measurements were taken on rams and their progenies. Since the distribution has started in 2005, 1965 Washera rams were distributed in to nine districts by different organizations like Food for Hunger International, World Vision,...

8. Consumers’ and Providers’ Opinions of New Technology in Health Care - Zolot, Joan
According to this study: * Both consumers and providers supported many uses of technology, from genetic testing to smartphones.

9. Parâmetros genéticos de características de carcaça e de crescimento de bovinos da raça nelore - Ferriani, L.; Albuquerque, L. G.; Baldi, F.; Venturini, G.C.; Bignardi, A.B.; Silva, J.A II.V.; Chud, T.C.S.; Munari, D.P.; Oliveira, J.A.
The objectives of this study were to estimate genetic parameters involving yearling weight (Ps), carcass weight (Pc), hip height (Ag) and the scores of conformation (C), precocity (P) and musculature (M) and carcass yield (Rd) and finishing score (Ac) in Nellore cattle in order to define criteria for selection in this breed. The data of the 20 732 animals were obtained from Agrope- cuária Jacarezinho, SP. Data were analyzed by restricted maximum likelihood using animal model multi-trait analysis, which included fixed effects of contemporary groups (animals born at the same month and slaughtered on the same day) and the covariate age at slaughter (linear) for carcass traits, and contemporary groups (animals of the same farm,...

10. Efeitos ambientais e genéticos sobre escores visuais e ganho em peso ao sobreano de bovinos brangus - Queiroz, S. A.; Oliveira, J.A.; Costa, G.Z.; Fries, L.A.
This research aimed at studying the effects of age of the cow at calving (IVP), age of the animal at yearling (IDS), the direct additive genetic (AD) and maternal (AM) effects and individual heterozygosity (HI) on visual scores of conformation (CS), early finishing (PS) and muscling (MS) at postweaning and average daily gain from weaning to yearling (GDS) of cattle used to originate the Brangus breed. There were analyzed records on 24 531, 21 166, 24 006 and 25 419 for CS, PS, MS and GDS, respectively, of animals born from 1986 to 2002 belonging to livestock files of Gensys Consultores Associados S/C Ltda. The analyses were performed by the least square method using...

11. Avaliações fenotípicas da raça bovina curraleiro pé-duro do semiárido do brasil - Carvalho, G.M.C.; Fé da Silva, L.R.; Almeida, M.J.O; Lima Neto, A.F.; Beffa, L.M.
The purpose of this research was to evaluate some qualitative and quantitative traits related to coat color, morphometric measurements, growth performance, weight daily gain, carcass and meat of Curraleiro Pé-Duro cattle (Bos taurus taurus, CPD). Data were obtained from the in situ conservation nucleus which belongs to the Brazilian Agricultural Research Corporation (EMBRAPA), located in the experimental farm in Piauí State, Brazil. The records were analyzed by least square method (Proc GLM) enclosed in SAS statistical package. Used models varied according to the analysis as well as the significance levels of environmental effects and their interactions. Growth performance means, among males and females, for birth (PN), weaning (P210), yearling (P365), 18 months (P18m), 24 months (P24m)...

12. ESTIMATES COVARIANCE FUNCTIONS TO GOATS MILK PRODUCTION USING REGRESSION MODELS RANDOM - Fonseca, Wéverton José Lima; Borges, Laylson da Silva; Evangelista, Amauri Felipe; Sousa, Paulo Henrique Amaral Araújo de; Nascimento, Genilson Sousa do; Figueiredo, Carlandia Pacheco de; Júnior, Teobaldo Florêncio de Almeida; Guerra, Leandro de Oliveira; Cavalcante, Diego Helcias; Sousa Júnior, Severino Cavalcante de
The aim of this review was to estimate covariance functions for the production of Alpine breeds of goat milk and Saanen using random regression models. Conventional analysis for estimating components of (co) variance and genetic parameters for growth traits are performed by finite-dimensional models, which allows the construction and use of selection indexes and mixed model equations, obtaining parameters as heritability and genetic correlation. The random regression models (MRA) enable work with characteristics of genetic lactation curves for each animal or growth that are measured repeatedly in the animal's life, called longitudinal data.

13. Random State Genetic Algorithm - Gacôgne, Louis
International audience

14. Genetic algorithms in the framework of Dempster-Shafer Theory of Evidence for maintenance optimization problems - Compare, Michele; Zio, Enrico
International audience

15. An in silico Approach Reveals Associations between Genetic and Epigenetic Factors within Regulatory Elements in B Cells from Primary Sjögren’s Syndrome Patients - Konsta, Orsia D.; Le Dantec, Christelle; Charras, Amandine; Brooks, Wesley H.; Arleevskaya, Marina I.; Bordron, Anne; Renaudineau, Yves
International audience

16. Nociceptin/orphanin FQ inhibits the survival and axon growth of midbrain dopaminergic neurons through a p38-MAPK dependent mechanism - Collins, Louise M.; Dal Bo, Giorgia; Calcagno, Mariangela; Monzón-Sandoval, Jimena; Sullivan, Aideen M.; Gutierrez, Humberto; Morari, Michele; O’Keeffe, Gerard W.
Nociceptin/orphanin FQ (N/OFQ) is an opioid-like neuropeptide that binds and signals through a G-protein-coupled receptor called the N/OFQ peptide (NOP) receptor. N/OFQ and the NOP receptor are expressed in the midbrain and have been implicated in the pathogenesis of Parkinson’s disease (PD). Genetic removal of the N/OFQ precursor partially protects midbrain dopaminergic neurons from 1-methyl-4-phenylpyridine-induced toxicity, suggesting that endogenous N/OFQ may be detrimental to dopaminergic neurons. However, whether N/OFQ directly affects the survival and growth of dopaminergic neurons is unknown. Here, we show that N/OFQ has a detrimental effect on the survival of dopaminergic neurons and the growth of their...

17. The role of ALS associated genes and c-Jun in neurodegeneration - Acosta Saltos, AD
The molecular pathways mediating motor neuron degeneration in Amyotrophic lateral sclerosis and axonal regeneration following peripheral nerve injury remain elusive. The transcription factor c-Jun, an important orchestrator of axonal regeneration, has been found upregulated in the spinal cord of ALS cases and the SOD1G93A mouse model of the disease. However the functional role of c-Jun in ALS degeneration has not been defined. The current thesis demonstrates that genetic deletion of c-Jun from neurons and neuroglia prolonged the lifespan of SOD1G93A mice. Associated with this effect on survival, motor neuron loss, axonal loss and neuroinflammation were attenuated in c-Jun deficient SOD1G93A...

18. Developmental function of Drosophila RASSF9 and RASSF10 - Banerjee, JJ
Cell polarity is a fundamental property of most living cells, and its disruption is associated with diseases such as cancer. Members of the N-terminal RASSF protein family have been proposed to function as tumour suppressors and oncogenes, but the underlying mechanisms are not well understood. Proteomic approaches have recently linked the human N-terminal RASSFs to PP1 phosphatases, as well as its regulatory subunit ASPP and two RASSFs - RASSF9 and RASSF10 - showed additional associations to both planar cell polarity (PCP) proteins and the apical-basal polarity determinant Par3/Bazooka. This thesis investigates the developmental function of RASSF9 and RASSF10 in Drosophila....

19. The development and testing of an oral health-related quality of life measure for children/adolescents with Down syndrome (OH-QOLADS) - Aljameel, AHM
Background: Down Syndrome is the most common genetic cause of intellectual disabilities. In addition, it is the most common chromosomal anomaly among liveborn infants. Individuals with this condition exhibit special oro-facial characteristics that increase their risk of oral conditions. The impact of oro-facial conditions on individuals may be related closely to their oral health (such as pain, discomfort, and in severe cases tooth loss), but can also extend to broader effects on personal relationships, emotional status and Quality of Life (QoL). However, there is very little research on the way oral health affects QoL of people with Down Syndrome. Aim:...

20. Molecular and morphometric characterization of the genus scaptotrigona (Apidae: meliponini) in Mesoamérica = Caracterización molecular y morfométrica del género scaptotrigona (Apidae: meliponini) en Mesoamérica - Hurtado Burillo, Miguel
Las abejas sin aguijón (tribu Meliponini) son un grupo de insectos sociales de la subfamilia Apinae formado por 42 géneros y un elevado número de especies, alrededor de 500, en las áreas tropicales. Dentro de su distribución, el área Neotropical es la que alberga una mayor diversidad y número de especies. Estos insectos tienen un papel muy importante como polinizadores generalistas tanto de la flora silvestre como en cultivos de gran importancia económica. Según numerosos estudios hay evidencias que apuntan a un declive mundial de las abejas y esto se acentúa más en las abejas sin aguijón por su particular...

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