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Pesquisa : G05.420.720 [Categoria DeCS]
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Id: biblio-886806
Autor: YOSHIDA, GRAZYELLA M; OLIVEIRA, CARLOS A L DE; KUNITA, NATALÍ M; RIZZATO, GABRIEL S; RIBEIRO, RICARDO P.
Título: Genetic parameters in female reproductive traits of Nile tilapia (Oreochromis niloticus)
Fonte: An. acad. bras. ciênc;89(3,supl):2515-2523, 2017. tab.
Idioma: en.
Resumo: ABSTRACT Genetic parameters for reproductive traits in female Nile tilapia were estimated in this study using Bayesian inference method. The data set presented information from 451 Nile tilapia females that were evaluated at two different places in Maringá - Paraná - Brazil (hapas of 1 and 10 m³) and at one location in Alfenas - Minas Gerais - Brazil. A spawning examination was conducted once a week from October 2012 to March 2013 for a total of 23 weeks of evaluation. Single-trait analyses for spawning success, multiple spawning, spawning frequency, and volume of eggs/female were performed by using the software MTGSAM Threshold. The heritability estimates were 0.14, 0.16, 0.53, and 0.08 for spawning success, multiple spawning, spawning frequency and volume of eggs/female, respectively, indicating it is possible to achieve a substantial genetic gain using these reproductive traits as selection criteria.
Descritores: Oviposição/genética
Reprodução/genética
Característica Quantitativa Herdável
Ciclídeos/genética
Genitália Feminina
-Oviposição/fisiologia
Fenótipo
Reprodução/fisiologia
Teorema de Bayes
Ciclídeos/anatomia & histologia
Ciclídeos/fisiologia
Limites: Animais
Feminino
Responsável: BR1.1 - BIREME


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Id: biblio-886870
Autor: OLIVEIRA, SHEILA N DE; RIBEIRO, RICARDO P; OLIVEIRA, CARLOS A L DE; ALEXANDRE FILHO, LUIZ; OLIVEIRA, ALINE M S; LOPERA-BARRERO, NELSON M; SANTANDER, VICTOR F A; SANTANA, RENAN A C.
Título: Interactive effects of genotype x environment on the live weight of GIFT Nile tilapias
Fonte: An. acad. bras. ciênc;89(4):2931-2943, Oct.-Dec. 2017. tab.
Idioma: en.
Resumo: ABSTRACT In this paper, the existence of a genotype x environment interaction for the average daily weight in GIFT Nile tilapia (Oreochromis niloticus) in different regions in the state of Paraná (Brazil) was analyzed. The heritability results were high in the uni-characteristic analysis: 0.71, 0.72 and 0.67 for the cities of Palotina (PL), Floriano (FL) and Diamond North (DN), respectively. Genetic correlations estimated in bivariate analyzes were weak with values between 0.12 for PL-FL, 0.06 for PL and 0.23 for DN-FL-DN. The Spearman correlation values were low, which indicated a change in ranking in the selection of animals in different environments in the study. There was heterogeneity in the phenotypic variance among the three regions and heterogeneity in the residual variance between PL and DN. The direct genetic gain was greater for the region with a DN value gain of 198.24 g/generation, followed by FL (98.73 g/generation) and finally PL (98.73 g/generation). The indirect genetic gains were lower than 0.37 and greater than 0.02 g/generation. The evidence of the genotype x environment interaction was verified, which indicated the phenotypic heterogeneity of the variances among the three regions, weak genetic correlation and modified rankings in the different environments.
Descritores: Peso Corporal/genética
Característica Quantitativa Herdável
Ciclídeos/genética
Interação Gene-Ambiente
-Brasil
Teorema de Bayes
Ciclídeos/anatomia & histologia
Genótipo
Limites: Animais
Masculino
Feminino
Responsável: BR1.1 - BIREME


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Id: biblio-886893
Autor: SHARIFI, PEYMAN; EBADI, ALI AKBAR.
Título: Relationships of rice yield and quality based on genotype by trait (GT) biplot
Fonte: An. acad. bras. ciênc;90(1):343-356, Mar. 2018. tab, graf.
Idioma: en.
Resumo: ABSTRACT An experiment was conducted to examine the influencing characters on rice by using 64 rice genotypes, including four local landraces, four released cultivars and 56 mutant lines (M5) derived from these genotypes, with application of the genotype by trait (GT) biplot methodology. The first two principal components (PC1 and PC2) accounted for 46.6% of total variation in 64 genotypes. The polygon view of GT biplot suggested seven sections for 64 genotypes. The vertex G38 had good amounts of grain yield, panicle length, hundred grain weight, internodes length, plant height and fertility percentage. Generally based on vector view it was demonstrated that the selection of high grain yield would be performed via thousand grain weight, panicle weight and number of filled grain per panicle. These traits should be considered simultaneously as effective selection criteria evolving high yielding rice genotypes because of their large contribution to grain yield. The genotypes G2, G4 and G7 could be considered for the developing of desirable progenies in the selection strategy of rice improvement programs. This study revealed GT biplot can graphically display the interrelationships among traits. In conclusion, it is recommended the use of GGE biplot to identify superior genotypes for simultaneous improvement of several traits.
Descritores: Oryza/genética
Produtos Agrícolas/genética
Característica Quantitativa Herdável
-Oryza/crescimento & desenvolvimento
Variação Genética/genética
Produtos Agrícolas/crescimento & desenvolvimento
Interação Gene-Ambiente
Irã (Geográfico)
Responsável: BR1.1 - BIREME


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Id: lil-764441
Autor: Santos, D. S.; Lima, M. G. B.; Noznica, C. F.; Lima, D. M.; Batista, C. F.; Gomes, R. C.; Bertagnon, H. G.; Santos, B. P.; Libera, A. M. M. P. Della.
Título: Conformação de úbere de caprinos da raça saanen: parâmetros estéticos ou funcionais? / Udder conformation of saanen goats: aesthetic or functional parameters?
Fonte: Arq. bras. med. vet. zootec;67(5):1287-1294tab, graf.
Idioma: pt.
Projeto: FAPESP.
Resumo: Diversos fatores predisponentes são descritos para as afecções mamárias ou distúrbios secundários que comprometem a qualidade e produtividade de leite de fêmeas nas diferentes espécies. As características fenotípicas do úbere são consideradas na avaliação econômica de uma fêmea caprina, tanto pelo potencial de produção como pelo registro genealógico dessa fêmea. A limitação de estudos correlacionando essas características com a saúde do úbere gera a dúvida a respeito do significado da conformação do mesmo à saúde e produtividade da glândula mamária. Sendo assim, este estudo teve como objetivo relacionar os parâmetros da conformação do úbere com a celularidade da glândula mamária aferida pelo teste California Mastitis Test (CMT) e contagem de células somáticas (CCS) em 80 cabras da raça Saanen sem alterações no exame clínico da glândula mamária nem no teste de Tamis. Observou-se que a maioria dos parâmetros fenotípicos de úbere não influenciou a CCS, sendo considerados puramente estéticos. A circunferência e profundidade de úbere demonstraram correlação negativa com a celularidade e, por serem características de herdabilidade moderada a alta, podem ser parâmetros considerados para seleção genética de caprinos.

Several predisposing factors are described for mammary diseases or secondary disorders that compromise the quality and productivity of milk from females in different species. The phenotypic characteristics of the udder are considered in the economic evaluation of a female goat, whether for production potential, or as the genealogical record for these females. The limitation of studies correlating these features with the udder health raises doubt about the meaning of the conformation to the health and productivity of the mammary gland. Therefore, this study aimed to list the parameters of the udder conformation with the cellularity of the mammary gland checked by California Mastitis Test (CMT) and somatic cell count (SCC) in 80 Saanen goats without alterations in the clinical examination of the mammary gland or the Tamis test. It was observed that most of the phenotypic parameters of the udder did not influence the CCS, being considered purely esthetic. The circumference and udder depth showed negative correlation with the cellularity and moderate to high heritability traits can be considered parameters for genetic selection of goats.
Descritores: Cabras
Glândulas Mamárias Animais
Leite
Mastite/veterinária
Ruminantes
-Contagem de Células/veterinária
Produção de Alimentos
Fenótipo
Característica Quantitativa Herdável
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: lil-751313
Autor: Li, Qing; Pan, Jiemin; Luo, Quanyong; Wang, Yan; Bao, Yuqian; Jia, Weiping.
Título: The key role of 99mTc-MIBI SPECT/CT in the diagnosis of parathyroid adenoma: a case report
Fonte: Arch. endocrinol. metab. (Online);59(3):265-269, 06/2015. graf.
Idioma: en.
Resumo: The concomitant occurrence of primary hyperparathyroidism (PHPT) due to parathyroid adenoma and papillary thyroid carcinoma (PTC) is not common. The co-occurrence of parathyroid tumors and thyroid diseases can lead to misdiagnosis owing to mutual interference of imaging in the early period of disease. The most commonly used imaging techniques for the preoperative localization of parathyroid and thyroid adenomas are technetium-99m sestamibi (99mTc-MIBI) scintigraphy and ultrasonography of the neck. Recently, 99mTc-MIBI single-photon emission computed tomography associated with computed tomography scintigraphy (SPECT/CT) has been used to detect PHPT, and its diagnostic value is being evaluated. Herein, we report a patient with an unusual co-occurrence of parathyroid adenoma and multiple thyroid diseases, including papillary thyroid carcinoma, thyroid adenoma and lymphocytic thyroiditis, which were localized with 99mTc-MIBI SPECT/CT and confirmed surgically. We suggest that 99mTc-MIBI SPECT/CT can play an important role in the diagnosis of parathyroid and thyroid lesions. Arch Endocrinol Metab. 2015;59(3):265-9.
Descritores: Interpretação Estatística de Dados
Interação Gene-Ambiente
Modelos Genéticos
Característica Quantitativa Herdável
-Família
Genótipo
Fenótipo
Limites: Humanos
Tipo de Publ: Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: lil-702747
Autor: Flores-Peña, Yolanda; Camal-Ríos, Nayla Y.; Cerda-Flores, Ricardo M..
Título: Evaluación de la percepción materna del peso del hijo y de la heredabilidad del IMC en diadas mestizas del Sureste de México
Fonte: Arch. latinoam. nutr;61(4):389-395, dic. 2011. ilus, graf, tab.
Idioma: es.
Resumo: Estudio descriptivo correlacional. Los objetivos fueron: 1) evaluar la percepción materna del peso del hijo mediante dos pruebas percepción por palabras (PP) e índice de masa corporal del hijo percibido por la madre (IMCP), 2) Evaluar sensibilidad y especificidad de las pruebas y 3) Cuantificar la heredabilidad (h2) del índice de masa corporal (IMC) en 173 diadas (madre-hijo). La PP fue valorada por la pregunta ¿cómo cree que su hijo esta? Para valorar el IMCP, la madre refirió peso y talla del hijo y se calculó el IMC del hijo percibido por la madre. Se midió peso y talla a madres e hijos. Se encontró que 10.3% de madres de hijos con sobrepeso (SP) y 1.8% de madres de hijos con obesidad (OB) los percibieron de forma adecuada por la prueba (PP) y por la prueba IMCP el 38.5% y 67.3% de madres de hijos con SP y OB respectivamente. La sensibilidad de PP fue 5.3% y especificidad 29.1%. La sensibilidad de IMCP fue 55.3% y especificidad 54.4%. La h2 del IMC fue de 15%. Se concluye que las madres no perciben el SP-OB de sus hijos y que el cuestionar a la madre peso y talla del hijo (IMCP) podría ayudar a percibir el SP-OB del hijo. La h2 del IMC indica que los factores del estilo de vida en esta población contribuyen al SP-OB. Dada la amplia diversidad socio-económica y cultural, estos resultados de Campeche deberán de ser validados con diseños similares de estudio.

Descriptive correlational study. The objectives were the following: 1) evaluate maternal perception of her child's weight through two test, Word-perception (WP) test and the Body mass index (BMI) of the child as perceived by the mother (Body weight index perception [BWIP]); 2) evaluate the sensitivity and specificity of the tests, and 3) quantify BMI heritability (h2) in 173 mother-child dyads. WP was assessed by asking the question, How do you think your child is? For assessing BWIP, the mother referred the child's weight and height, and we calculated the child's BMI as perceived by the mother. The weight and height of the mothers and their children were measured. We found that 10.3% of mothers of children with Overweight (OW) and 1.8% of mothers of children with Obesity (OB) perceived their children adequately by means of WP; by means of the BWIP test, 38.5 and 67.3% of mothers of children with OW and OB, respectively, exhibited adequate perception. BWIP sensitivity was 55.3% and specificity was 54.4%. BWI h2 was 15%. We was concluded that mothers did not perceive the OW-OB of their children, and that asking the mother for the weight and height of the child (BMIP) will aids her to perceive the OW-OB of her child. The BWI h2 indicate that the lifestyle factors of this population contribute to OW-OB. Given the broad socioeconomic and cultural diversity, these results of the southeastern Mexican state of Campeche should be evaluated with similar study designs.
Descritores: Mães
Obesidade/genética
Característica Quantitativa Herdável
Percepção de Peso
-Índice de Massa Corporal
México
Obesidade/psicologia
Sensibilidade e Especificidade
Limites: Criança
Feminino
Humanos
Masculino
Responsável: VE1.1 - Biblioteca Humberto Garcia Arocha


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Id: lil-659641
Autor: Forjaz, C.L.M.; Bartholomeu, T.; Rezende, J.A.S.; Oliveira, J.A.; Basso, L.; Tani, G.; Prista, A.; Maia, J.A.R..
Título: Genetic and environmental influences on blood pressure and physical activity: a study of nuclear families from Muzambinho, Brazil
Fonte: Braz. j. med. biol. res = Rev. bras. pesqui. méd. biol;45(12):1269-1275, Dec. 2012. tab.
Idioma: en.
Resumo: Blood pressure (BP) and physical activity (PA) levels are inversely associated. Since genetic factors account for the observed variation in each of these traits, it is possible that part of their association may be related to common genetic and/or environmental influences. Thus, this study was designed to estimate the genetic and environmental correlations of BP and PA phenotypes in nuclear families from Muzambinho, Brazil. Families including 236 offspring (6 to 24 years) and their 82 fathers and 122 mothers (24 to 65 years) were evaluated. BP was measured, and total PA (TPA) was assessed by an interview (commuting, occupational, leisure time, and school time PA). Quantitative genetic modeling was used to estimate maximal heritability (h²), and genetic and environmental correlations. Heritability was significant for all phenotypes (systolic BP: h² = 0.37 ± 0.10, P < 0.05; diastolic BP: h² = 0.39 ± 0.09, P < 0.05; TPA: h² = 0.24 ± 0.09, P < 0.05). Significant genetic (r g) and environmental (r e) correlations were detected between systolic and diastolic BP (r g = 0.67 ± 0.12 and r e = 0.48 ± 0.08, P < 0.05). Genetic correlations between BP and TPA were not significant, while a tendency to an environmental cross-trait correlation was found between diastolic BP and TPA (r e = -0.18 ± 0.09, P = 0.057). In conclusion, BP and PA are under genetic influences. Systolic and diastolic BP share common genes and environmental influences. Diastolic BP and TPA are probably under similar environmental influences.
Descritores: Pressão Sanguínea/genética
Interação Gene-Ambiente
Predisposição Genética para Doença/genética
Hipertensão/genética
Atividade Motora/genética
-Brasil
Característica Quantitativa Herdável
Limites: Adolescente
Adulto
Idoso
Criança
Feminino
Humanos
Masculino
Pessoa de Meia-Idade
Adulto Jovem
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: lil-553790
Autor: Eler, J. P; Ferraz J. B. S; Balieiro, J. C. C; Mattos, E. C.
Título: Genetic analysis of average annual productivity of Nellore breeding cows (COWPROD)
Fonte: Genet. mol. res. (Online);7(1):234-242, Jan. 2008. ilus, tab.
Idioma: en.
Resumo: With the aim of estimating the coefficient of heritability of average annual productivity of Nellore cows (COWPROD), a data set from 24,855 animals with known pedigree was analyzed. COWPROD is defined as the amount (in kilograms) of weaned calves produced yearly by one cow during her remaining time in herd ignoring a fixed period of 365 days. COWPROD was calculated regarding three standards: a) based on the post-weaning weight from the calves ignoring any kind of adjustment (COWPROD_NAJ), b) adjusted weight for the fixed effects (COWPROD_AJFIX) and c) adjusted weight for the fixed effects and for the genetic merit of the sire (COWPROD_AJFIN). The obtained heritabilities were 0.15, 0.15 and 0.16 for COWPROD_NAJ, COWPROD_AJFIX and COWPROD_AJFIN, respectively. A complete set composed of 105,158 COWPROD records on 130,740 animals in pedigree was also analyzed for predicting the genetic merit of all animals in the data set and for the calculation of the genetic, phenotypic and residual trends. Ranking correlation was high for the adjusted and non-adjusted data, yet, for some of the animals, the difference among the genetic values was large. This would be an indication that it would be better to work always with the adjusted weaning weights. The genetic trend was positive, but was of small magnitude (0.26% of the trait average) and the residual trend was negative as a consequence of the large intensification of the production system, which has been occurring in the last years in the farms studied. The phenotypic trend was also negative and intermediate between the genetic and the residual ones.
Descritores: Bovinos/genética
Cruzamentos Genéticos
Característica Quantitativa Herdável
Reprodução/genética
-Peso Corporal
Fenótipo
Limites: Animais
Feminino
Responsável: BR26.1 - Biblioteca Central


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Id: lil-529932
Autor: Martins, Jorge S. Sá; Stauffer, Dietrich; Oliveira, Paulo M. C. de; Oliveira, Suzana Moss de.
Título: Simulated self-organization of death by inherited mutations
Fonte: An. acad. bras. ciênc;81(4):707-714, Dec. 2009. graf.
Idioma: en.
Resumo: An agent-based computer simulation of death by inheritable mutations in a changing environment shows a maximal population, or avoids extinction, at some intermediate mutation rate of the individuals. Our results indicate that death seems needed to allow for evolution of the fittest, as required by a changing environment.

Simulação computacional de agentes individuais que se reproduzem e morrem por acúmulo de mutações herdadas mostra um máximo da população ou evita extinção, para taxas de mutação intermediárias. Assim, as mortes parecem necessárias para a evolução dos mais adaptados a um ambiente mutante.
Descritores: Simulação por Computador
Modelos Genéticos
Mutação/genética
Dinâmica Populacional
Seleção Genética/genética
-Genética Populacional
Método de Monte Carlo
Fenótipo
Densidade Demográfica
Característica Quantitativa Herdável
Limites: Feminino
Humanos
Masculino
Responsável: BR1.1 - BIREME


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Alfenas, A. C
Id: lil-482172
Autor: Dias, L. A; Picoli, E. A; Rocha, R. B; Alfenas, A. C.
Título: A priori choice of hybrid parents in plants
Fonte: Genet. mol. res. (Online);3(3):356-368, 2004.
Idioma: en.
Resumo: Plant breeding deals with high-yielding genotypes. However, how best to choose parents of these genotypes remains an unsolved question. Here, we focus on a priori choice based on parental distances by means of agronomic and molecular data. Despite numerous theoretical and empirical studies, a priori choice continues to be a controversial procedure. Both success and failure are commonly reported. We looked at these ambiguous results in order to investigate their possible causes. A total of 139 articles on genetic divergence were sampled to examine aspects such as type and number of markers utilized. We suggest that the mean number of 160, 281 and 25 for RAPD and RFLP markers, and SSR loci, respectively, which we found in these papers, should be increased for accurate analysis. A second sample composed of 54 articles was used to evaluate the divergence-heterosis association. Most of them (28) detected positive divergence-heterosis association, whereas 26 revealed negative or inconclusive results. We examined several causes that influence a priori choice positively and negatively.
Descritores: Desequilíbrio de Ligação/genética
Variação Genética
Genes de Plantas/genética
Cruzamento/métodos
Vigor Híbrido/genética
-Marcadores Genéticos
Genótipo
Repetições de Microssatélites
Polimorfismo de Fragmento de Restrição
Característica Quantitativa Herdável
Técnica de Amplificação ao Acaso de DNA Polimórfico
Reprodutibilidade dos Testes
Tipo de Publ: Metanálise
Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME



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