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| Registros recuperados: 177 | |
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| Chattopadhyay,Arup; Baran Sharangi,Amit; Dai,Nuka; Dutta,Subrata. |
| Chilli (Capsicum annuum L.) is regarded as one of the main commercial vegetable and spice crops at the global level. Maximum diversity can be noted among the cultivars/landraces available in India with respect to shape, size, yield, quality, and other traits. The present experiment was conducted to identify the most promising chilli variety suited for green and dry purposes, to study the genetic variability for different traits and to assess the association of different yield attributing traits with the green and dry yield of chilli. Thirty four genotypes were characterized during a 2-yr period. Most of the genotypes possessed the character constellation of C. annuum. Two genotypes, Chaitali Pointed and BC CH Sel-4 were found most promising with... |
| Tipo: Journal article |
Palavras-chave: Quantitative traits; Qualitative traits; Genetic variability; Heritability; Selection index. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300002 |
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| Benin,Giovani; Carvalho,Fernando Irajá Félix de; Oliveira,Antônio Costa de; Lorencetti,Claudir; Valério,Igor Pires; Schmidt,Douglas André Mallmann; Hartwig,Irineu; Ribeiro,Guilherme; Vieira,Eduardo Alano; Silva,José Antonio Gonzales da. |
| Several studies have searched for higher efficiency on plant selection in generations bearing high frequency of heterozygotes. This work aims to compare the response of direct selection for grain yield, indirect selection through average grain weight and combined selection for higher yield potential and average grain weight of oat plants (Avena sativa L.), using the honeycomb breeding method. These strategies were applied in the growing seasons of 2001 and 2002 in F3 and F4 populations, respectively, in the crosses UPF 18 CTC 5, OR 2 <FONT FACE=Symbol>´</FONT> UPF 7 and OR 2 <FONT FACE=Symbol>´</FONT> UPF 18. The ten best genetic combinations obtained for each cross and selection strategy were evaluated in greenhouse yield trials.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selection method; Heritability; Single plant selection. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000400009 |
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| Rakocevic, Miroslava; Sturion, José Alfredo; Medrado, Moacir José Sales; Lavoranti, Osmir José; Mosele, Sérgio Henrique; Valduga, Alice Tereza. |
| The aims of this study were to estimate the genetic parameters for 59 half-sib progenies of maté under runing for formation, and to evaluate the ecophysiological properties for four progenies (P15, P18, P41 e 47) and two controls (P61 and P62), components of one maté breeding experiment combining rovenances and progenies, established in Erechim, RS. The ecophysiological properties (stomatal onductance (gs) - mol m-2s-1, net photosynthesis (A) - μmol CO2 m-2s-1, and transpiration (E) -mmol H2O - s-1) were measured during one year in five epochs (from September 2002 to August 2003). The variance omponents, genetic and phenotypic parameters and genetic values (for data of foliar mass collected in runing of formation) were obtained using a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic value; Heritability; Photosynthesis; Stomatal conductance; Transpiration. Condutância estomática; Fotossíntese; Herdabilidade; Transpiração; Valor genético.. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/229 |
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| Mingramm Yarza, Germán. |
| Con la finalidad de evaluar la aptitud combinatoria y los efectos entre genotipo y medio ambiente en maíz, en relación con la provitamina A y rendimiento, la presente investigación se realizó utilizando las cruzas de 38 líneas (22 pertenecientes al grupo heterótico A y 16 al grupo heterótico B) con tres probadores cada una. Los híbridos formados se evaluaron en cuatro ensayos (tres del grupo heterótico A y uno del grupo heterótico B) bajo un diseño de bloques incompletos al azar. Cada ensayo se sembró en cuatro ambientes dentro de dos localidades (Tlaltizapán, Morelos– condiciones normales y labranza de conservación; y Agua Fría, Puebla– condiciones normales y de estrés hídrico). Los híbridos se evaluaron para rendimiento, días a floración y altura de... |
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Palavras-chave: Zea mays; Carotenos; Heredabilidad; Aditividad; Carotenes; Heritability; Additivity; Producción de Semillas; Maestría. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/777 |
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| Baldi,Fernando; Laureano,Monyka Marianna Massolini; Gordo,Daniel Gustavo Mansan; Bignardi,Annaiza Braga; Borquis,Rusbel Raul Aspilcueta; Albuquerque,Lucia Galvão de; Tonhati,Humberto. |
| The objectives of this study were to estimate the genetic parameters for milk yield unadjusted and adjusted for days in milk and, subsequently, to assess the influence of adjusting for days in milk on sire rank. Complete lactations from 90 or 150 days of lactation to 270 or 350 days in milk were considered in these analyses. Milk yield was adjusted for days in milk by multiplicative correction factors, or by including lactation length as a covariable in the model. Milk yields adjusted by different procedures were considered as different traits. Heritability estimates varied from 0.17 to 0.28. Genetic correlation estimates between milk yields unadjusted and adjusted for days in milk were greater than 0.82. Adjusting for days in milk affected the parameter... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic correlations; Heritability; Lactation length; Milk production; Rank correlations. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100012 |
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| Tamioso,Priscilla Regina; Alberti Filho,Jaime Luiz; Dias,Laila Talarico; Teixeira,Rodrigo de Almeida. |
| The study aimed to estimate the components of (co)variance and heritability for weights at birth (BW), weaning (WW) and 180 days of age (W180), as well as the average daily gains from birth to weaning (ADG1), birth to 180 days of age (ADG2) and weaning to 180 days of age (ADG3) in Suffolk sheep. Thus, three different single-trait animal models were fitted, considering the direct additive genetic effect (Model 1), the direct additive genetic and maternal permanent environmental effects (Model 2), and in Model 3, in addition to those in Model 2, the maternal additive genetic effect was included. After comparing models through the likelihood ratio test (LRT), model 3 was chosen as the most appropriate to estimate heritability for BW, WW and ADG1. Model 2 was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Average daily weight gain; Body weight; Heritability; Maternal effects; Suffolk. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016 |
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| Costa-Maia,Fabiana Martins; Toledo,Vagner de Alencar Arnaut de; Martins,Elias Nunes; Lino-Lourenço,Daniela Andressa; Sereia,Maria Josiane; Oliveira,Carlos Antonio Lopes de; Faquinello,Patrícia; Halak,André Luiz. |
| Genetic and phenotypic parameters considering the genetic effect on hygienic behavior of queen and workers from 40 Africanized honeybees colonies were estimated separately. Maternal origin of queens was controlled whereas the paternal was unknown, and different groups of workers were considered in three seasons, October 2006, April 2007 and August 2007, but with the same queen. Colonies were 21 honey producers and 19 royal jelly producers. After the method of freezing capped brood, hygienic behavior was determined by the ratio between the number of dead capped brood removed at 24, 48 and 72 hours and the total number of capped brood at zero hour. Data was submitted to single and three traits analyses using Bayesian inference. Estimates of direct... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Africanized honeybee queens; Bayesian inference; Genetic correlation; Heritability; Maternal effect; Removal of dead capped brood. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000900010 |
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| Bainy,Adriane Molardi; Savegnago,Rodrigo Pelicioni; Freitas,Luara Afonso de; Nunes,Beatriz do Nascimento; Rosa,Jaqueline Oliveira; Ledur,Mônica Corrêa; Munari,Danísio Prado. |
| Abstract: The objective of this work was to estimate genetic parameters for bird carcass and meat quality traits, as well as to explore the genetic patterns of the breeding values of this population using cluster analyses. Data from 1,846 birds were used to estimate the genetic parameters of production and quality traits using the multiple-trait animal model, and cluster analyses were performed. The heritability estimates ranged from 0.08± 0.03 for meat pH measured 24 hours after slaughter to 0.85± 0.09 for body weight. The genetic correlations between production traits were high and positive. The genetic correlations between meat quality traits were low and were not informative due to the high standard errors (same magnitudes as those of the genetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic correlation; Heritability; Meat color; White Leghorn. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000300205 |
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| Oliveira,Elisa Junqueira; Savegnago,Rodrigo Pelicioni; Freitas,Luara Afonso de; Freitas,Anielly Paula; Maia,Suellen Rodrigues; Simili,Flávia Fernanda; Faro,Lenira El; Costa,Ricardo Lopes Dias da; Santana Júnior,Mário Luiz; Paz,Claudia Cristina Paro de. |
| Abstract: The objective of this work was to estimate genetic parameters for traits related to resistance to endoparasites in Santa Inês sheep, for a possible inclusion in sheep breeding programs, as well as to evaluate the additive genetic pattern of the animals using cluster analyzes, in order to assess whether there are groups within the population that can be used as candidates for selection for resistance to endoparasites. The studied traits were: Famacha score, fecal egg counts (FEC), packed cell volume (PCV), total plasma protein (TPP), body condition score (BCS), and body weight (BW). Heritability estimates ranged from 0.17 (0.05) for TPP to 0.31 (0.07) for BCS. The cluster analyzes based on the breeding values identified four clusters. Famacha and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cluster analysis; Famacha; Genetic correlation; Heritability; K-means; Multivariate analysis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201338 |
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| Silva,Paulo Sérgio Lima e; Antonio,Rafaela Priscila; Mariguele,Keny Henrique; Silva,Kathia Maria Barbosa e; Lima,Lidiane Kely de; Silva,Júlio César do Vale. |
| Apparently, there are no custard apple cultivars defined for the northeastern region of Brazil. The establishment of breeding programs aimed at the selection of types from productive locations for later cloning is desirable. This work's objective was to evaluate the yield (during the first three crops) and quality (first crop) of fruits from 20 half-sibling custard apple tree progenies, selected from home orchards. An additional objective was to estimate genetic parameters for the traits evaluated. A micro sprinkling-irrigated experiment was conducted in Mossoró-RN, Brazil, as random blocks with five replications. In characteristics evaluated for periods longer than a year (diameter, height and mean weight of fruits, number of fruits ha-1 and fruit yield... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annona squamosa L.; Bullock's heart; Sweetsop; Heritability; Genotypic correlation. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452007000300027 |
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| Bertipaglia,Tássia Souza; Carreño,Luis Orlando Duitama; Machado,Carlos Henrique Cavallini; Andrighetto,Cristiana; Fonseca,Ricardo da. |
| The objective of this study was to evaluate the association of visual scores of body structure, precocity and muscularity with production (body weight at 18 months and average daily gain) and reproductive (scrotal circumference) traits in Brahman cattle in order to determine the possible use of these scores as selection criteria to improve carcass quality. Covariance components were estimated by the restricted maximum likelihood method using an animal model that included contemporary group as fixed effect. A total of 1,116 observations of body structure, precocity and muscularity were used. Heritability was 0.39, 043 and 0.40 for body structure, precocity and muscularity, respectively. The genetic correlations were 0.79 between body structure and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Average daily gain; Body weight at 18 months; Genetic correlation; Heritability; Scrotal circumference. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600013 |
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| Cavalcante Neto,Aderbal; Lui,Jeffrey Frederico; Sarmento,José Lindenberg Rocha; Ribeiro,Maria Norma; Monteiro,José Mauro Costa; Fonseca,Carlos; Tonhati,Humberto. |
| The main objective of this study was to evaluate the importance of including maternal genetic, common litter environmental and permanent environmental effects in estimation models of variance components for the farrowing interval trait in swine. Data consisting of 1,013 farrowing intervals of Dalland (C-40) sows recorded in two herds were analyzed. Variance components were obtained by the derivative-free restricted maximum likelihood method. Eight models were tested which contained the fixed effects(contemporary group and covariables) and the direct genetic additive and residual effects, and varied regarding the inclusion of the maternal genetic, common litter environmental, and/or permanent environmental random effects. The likelihood-ratio test indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Common litter; Maternal effect; Permanent environment; Heritability; Repeatability; Swine. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100009 |
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| Tholon,P.; Queiroz,S.A.. |
| The objective of this work was to determine genetic parameters for body weight of tinamou in captivity. It was used random regression models in analyses of data by considering the direct additive genetic (DA) and permanent environmental effects of the animal (PE) as random effects. Residual variances were modeled by using a fifth-order variance function. The mean population growth curve was fitted by sixth-order Legendre orthogonal polynomials. Direct additive genetic effects and animal environmental permanent effect were modeled by using Legendre polynomials of order two to nine. The best results were obtained by models with orders of fit of 6 for direct additive genetic effect and of order 3 for permanent effect by Akaike information criterion and of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic correlation; Heritability; Legendre polynomials; Tinamou; Wild bird. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000400011 |
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| Madad,Mostafa; Hossein-Zadeh,Navid Ghavi; Shadparvar,Abdol Ahad. |
| Abstract: The objective of this work was to estimate covariance functions for additive genetic and permanent environmental effects, as well as to obtain genetic parameters for buffalo test-day milk yield using random regression models on Legendre polynomials (LPs). A total of 2,538 test-day milk yield (TDMY) records from 516 first lactation records of Khuzestan buffalo, calving from 1993 to 2009 and belonging to 150 herds located in the state of Khuzestan, Iran, were analyzed. The residual variances were modeled through a step function with 1, 5, 6, 9, and 19 classes. The additive genetic and permanent environmental random effects were modeled by LPs of days in milk using quadratic to septic polynomial functions. The model with additive genetic and animal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Covariance functions; Genetic correlations; Heritability; Legendre polynomial; Milking buffalo.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000700890 |
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| Manuel,Matos; Cavani,Ligia; Millen,Danilo Domingues; Andrighetto,Cristiana; Lupatini,Gelci Carlos; Fonseca,Ricardo da. |
| ABSTRACT: Interest in improving feed efficiency of cattle has been increasing. The residual feed intake (RFI), the most commonly used measurement of feed efficiency, is expensive and can only be used in a small number of animals. The Kleiber Index has also been proposed to measure RFI. In this study, we estimated genetic parameters for the Kleiber Index average daily weight gain and adjusted weights to obtain a more comprehensive understanding of potential responses to selection and support the development of breeding strategies. Genetic analyses were conducted on animal records from a data file with 36,505 animals recorded by ABCZ (Brazilian Association of Zebu Breeders). Restricted maximum likelihood estimates of genetic parameters were computed with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic correlation; Average daily gain; Heritability; Standard age weight. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600459 |
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| Prchal, Martin; Vandeputte, Marc; Gela, David; Dolezal, Marek; Blichtova, Hana; Rodina, Marek; Flaishans, Martin; Kocour, Martin. |
| Fish are a rich source of omega-3 polyunsaturated fatty acids (n-3 PUFAs) and thus, they should be an integral part of human diet at least twice a week. As a result, high attention has been devoted to the improvement of fatty acids (FA) content in the flesh of farmed fish through nutrition. Conversely, there are very few data on the potential of selective breeding to improve FA composition in fish. We estimated genetic parameters of fillet fatty acid content and performance traits in market size common carp cultured under semi-intensive pond conditions. The experimental stock arose through factorial mating of 7 dams and 36 sires. All families were reared communally. Pedigree was reconstructed with microsatellite markers, and 158 individuals were dressed... |
| Tipo: Text |
Palavras-chave: Genetic correlations; Genetic improvement; Growth; Heritability; Slaughtering traits; Supplemental feeding. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00449/56043/57558.pdf |
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| Registros recuperados: 177 | |
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