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| Registros recuperados: 12 | |
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| Viana,José Marcelo Soriano; Faria,Vinícius Ribeiro; Silva,Admilson da Costa e. |
| The prediction of gains from selection allows the comparison of breeding methods and selection strategies, although these estimates may be biased. The objective of this study was to investigate the extent of such bias in predicting genetic gain. For this, we simulated 10 cycles of a hypothetical breeding program that involved seven traits, three population classes, three experimental conditions and two breeding methods (mass and half-sib selection). Each combination of trait, population, heritability, method and cycle was repeated 10 times. The predicted gains were biased, even when the genetic parameters were estimated without error. Gain from selection in both genders is twice the gain from selection in a single gender only in the absence of dominance.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Predicted genetic gain; Realized genetic gain; Recurrent selection. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300012 |
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| Dalbosco,Edinéia Zulian; Krause,Willian; Neves,Leonarda Grillo; Araújo,Dejânia Vieira de; Hiega,Kemely Mara Ramalho; Silva,Cintia Graciele da. |
| Abstract Several traits must be observed in the selection of sour passion fruit progenies. For such, selection indices could be used for gradually increasing the frequency of favorable genotypes for the set of the traits of interest. This study aimed to compare parametric and non-parametric selection indices to be used in the selection of passion fruit progenies and identify the best economic weights. Thus, 118 full-sib families and three controls were assessed for days regarding flowering, productivity in kg ha-1 year, fruit mass in g, number of fruits, average length of fruits in mm, average fruit diameter in mm, fruit shape, average shell thickness in mm, pulp yield, pulp color, total soluble solids, titratable acidity and SS/ATT ratio. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic gains; Recurrent selection; Passiflora edulis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000100801 |
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| Barros,Luciane Bertoletti; Moreira,Rosângela Maria Pinto; Ferreira,Josué Maldonado. |
| Knowledge of the association between characters is very important in the genetic breeding programs, but there is limited information about correlations between traits in maize landraces in the current literature. The objectives of this study were to estimate phenotypic, additive genetic and environment correlations among traits in maize landraces, which were cultivated in family farm systems, in order to guide the participatory breeding on maize landraces. Between 294 and 400 half-sib progenies from the six populations were evaluated, subdivided in triple 7X7 and 10X10 lattice design, respectively, with single row plots of 4 m long and spaced 1.00 × 0.20 m. Estimates of correlation coefficients are reported for nine traits: grain yield (GY), relation grain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Population; Recurrent selection; Participatory breeding. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600010 |
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| Lemos,Roxane do Carmo; Abreu,Ângela de Fátima Barbosa; Ramalho,Magno Antonio Patto. |
| ABSTRACT: When breeding the common bean in Brazil, the best progenies are chosen, normally, from solely the generation under analysis at the conclusion of the evaluation, without considering what occurred in the past. However, a number of recently published studies show that if an evaluation were to consider all relevant generations, the gain from selection could be higher, especially when an index that involves information from the population that gave rise to the progenies is used. Thus, the aim of this study was to compare three selection procedures in the evaluation of successive generations and to discuss the implications of the progeny × environment interaction in terms of success of selection. Cycle XV progenies from a bean recurrent selection... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Recurrent selection; Selection index; Mixed model approach. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101101 |
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| Andrade,João Antonio da Costa; Miranda Filho,José Branco de. |
| Good yield and intermediate plant height, ear height, and tassel size characterize the maize population ESALQ-PB1 as an outstanding breeding population. Estimates of genetic parameters are reported for 13 traits: plant height (PH), ear height (EH), ear placement (EP), tassel length (TL), tassel weight (TW), tassel branch number (TB), ear weight (EW), total grain weight (GW), ear length (EL), ear diameter (ED), kernel row number (RN), kernel number per row (KR) and prolificacy (PR). Results refer to one location and one year. Genetic variation was detected for all traits, and the estimates of the additive genetic variance are presented. The coefficients of heritability (individual basis) varied from 0.14 to 0.72 and were considered high for PH, EH and TB;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic parameters; Genetic variability; Heritability; Recurrent selection. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000200011 |
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| Torres Morales, Braulio. |
| Para determinar el efecto de la selección recurrente para alto contenido de aceite se evaluaron tres sintéticos de maíz de grano amarillo en tres localidades del estado de Chiapas en el ciclo de temporal Primavera-Verano 2008; estos sintéticos provienen de tres ciclos de selección producto de la recombinación de las mejores 50 familias de medios hermanos (FMH). Durante el desarrollo del cultivo y al momento de la cosecha se tomaron datos de las variables agronómicas; en las tres localidades se tomaron muestras de grano de cada una de las parcelas las cuales se analizaron en laboratorio para determinar el contenido de aceite y la proporción de las estructuras en el grano. De las muestras de dos localidades también se tomó una submuestra para determinar el... |
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Palavras-chave: Selección recurrente; Ganancia genética; Contenido de aceite; Ácidos grasos; Recurrent selection; Genetic gain; Oil content; Fatty acids; Maestría; Genética. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/86 |
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| Torres Morales, Braulio. |
| Para determinar el efecto de la selección recurrente para alto contenido de aceite se evaluaron tres sintéticos de maíz de grano amarillo en tres localidades del estado de Chiapas en el ciclo de temporal Primavera-Verano 2008; estos sintéticos provienen de tres ciclos de selección producto de la recombinación de las mejores 50 familias de medios hermanos (FMH). Durante el desarrollo del cultivo y al momento de la cosecha se tomaron datos de las variables agronómicas; en las tres localidades se tomaron muestras de grano de cada una de las parcelas las cuales se analizaron en laboratorio para determinar el contenido de aceite y la proporción de las estructuras en el grano. De las muestras de dos localidades también se tomó una submuestra para determinar el... |
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Palavras-chave: Selección recurrente; Ganancia genética; Contenido de aceite; Ácidos grasos; Recurrent selection; Genetic gain; Oil content; Fatty acids; Maestría; Genética. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/86 |
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| Garbuglio, Deoclecio Domingos; IAPAR; Miranda Filho, José Branco; USP; Cella, Marcos; USP. |
| Os objetivos do presente trabalho se dirigem ao estudo da variabilidade genética em sete populações de milho de ampla base genética, visando ao melhoramento de populações. Os experimentos foram instalados em blocos casualizados em um local (Anhembi, Estado de São Paulo) com famílias S1 de sete populações (GO-D: dentado, GO-F: flint, GO-L: espiga longa, GO-G: espiga grossa; e compostos G3, G4 e GO-S). Foram estimadas a variância genética entre médias de famílias, a variância fenotípica entre médias de famílias e o coeficiente de herdabilidade (sentido amplo) para médias de famílias. As estimativas de herdabilidade foram altas para peso de espigas (0,89 a 0,94), comprimento da espiga (0,77 a 0,88) e diâmetro da espiga (0,77 a 0,92), e menores para altura da... |
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Palavras-chave: 5.01.00.00-9 Agronomia Zea mays L.; Melhoramento; Seleção recorrente Melhoramento Vegetal Zea mays L.; Breeding; Recurrent selection. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/790 |
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| Registros recuperados: 12 | |
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