Consulta: subjectFacets:"General combining ability"
Registros recuperados: 14
Data/hora: 04/06/2024 03:33:46

Partial diallel analysis of agronomic characters in rice (Oryza sativa L.)
Provedor de dados: 74
Autores: Torres,Edgar Alonso; Geraldi,Isaias O.
Rice (Oryza sativa L.) breeding seeking to combine high productivity and cold tolerance for the temperate Latin America region is an important challenge. We estimated some useful parameters which can be used to investigate the genetic control of agronomic characters in crosses combining cold tolerance and productivity. A partial diallel design was used in crosses between six tropical indica rice cold susceptible genotypes (group 1) and seven japonica or indica/japonica cold tolerant rice genotypes (group 2). Parents and crosses were evaluated for agronomic characters under field conditions in two different experiments in 2005. The results showed significant mid-parent heterosis for all characters (plant height, tiller number, days to 50% flowering, panicle...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: General combining ability; Heterosis; Hybrid rice; Specific combining ability.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400018

Estimation of variances of the effects of incomplete diallels using a matrix approach
Provedor de dados: 74
Autores: Assis,Giselle Mariano Lessa de; Fonseca,Ricardo da; Cruz,Cosme Damião; Carneiro Júnior,José Marques.
A matrix approach is described for assessing the variance of effects in incomplete diallels designs. The method is illustrated by reference to simulated complete and incomplete diallels using different combinations of constraints, average degree of dominance and, for the incomplete diallel, number of hybrids. Our results showed that caution should be taken in working with incomplete diallels under conditions of overdominance because there were changes in the rank of the genotypes when the excluded hybrid had parents with a low frequency of the favorable allele (i.e. the allele which increases expression of a character). The expression described in this paper is a rapid and safe approach to estimate variances and covariances of the effects of contrasts of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Incomplete diallel; General combining ability; Specific combining ability.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300017

Agronomic traits and chemical composition of single hybrids of sweet corn
Provedor de dados: 75
Autores: Kwiatkowski,Angela; Clemente,Edmar; Scapim,Carlos Alberto.
In Brazil, the greengrocery market of sweet corn has been expanding along the country. In contrast, there have been few agri-industries canning sweet corn (Zea mays) because of the lack of cultivars with agronomic characteristics proper to industrial purposes. The purpose of this study was to evaluate the general combining ability (GCA) of seven inbred lines of sweet corn, and the specific combining ability (SCA) of their hybrid combinations based on their agronomic traits, and the chemical composition of the grain. In the growing season 2006/2007, twenty-one single hybrids were evaluated in the Iguatemi Research Station, Maringá County, Northwestern Paraná, in Brazil using a complete randomized block design with four replications. Data were subjected to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; General combining ability; Specific combining ability; Grain quality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000400015

Heterosis in crosses among white grain maize populations with high quality protein
Provedor de dados: 86
Autores: Rodrigues,Márcio Costa; Chaves,Lázaro José; Pacheco,Cleso Antônio Patto.
The objective of this work was to investigate heterosis and its components in 16 white grain maize populations presenting high quality protein. These populations were divided according to grain type in order to establish different heterosis groups. The crosses were carried out according to a partial diallel cross design among flint and dent populations. Seven agronomic traits were evaluated in three environments while four leaf diseases and incidence of corn stunt were evaluated in one. Least square procedure was applied to the normal equation X'Xbeta = X'Y, to estimate the model effects and their respective sum of squares. Among the heterosis components, in diallel analysis, significance for average heterosis in grain yield, number of days to female...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Partial diallel; General combining ability.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000100009

Interference of genotypes x environments interaction in the genetic control of resistance to Asian rust soybean
Provedor de dados: 86
Autores: Ribeiro,Aliny Simony; Toledo,José Francisco Ferraz de; Ramalho,Magno Antonio Patto.
The objectives of this work were to identify parents resistant to Asian soybean rust using diallel crosses, obtain information on the genetic control of soybean resistance to the pathogen and verify whether the combining ability estimates interact with the environment (year or time of assessment). The F1 generation was obtained in a greenhouse from crosses between five contrasting parents for the trait resistance to soybean rust, in a complete diallel without reciprocals. Two rust-severity assessments were carried out on individual soybean plants of 25 treatments (parents and F2 and F3 populations) in 2006/2007 and 2007/2008, in an experimental field at Embrapa Soja, Londrina, PR, Brazil. Additive effects predominated in the genetic control of soybean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Phakopsora pachyrhizi; General combining ability; Specific combining ability.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000900014

Diallel analysis and heterosis components in paprika peppers
Provedor de dados: 124
Autores: Lasmar,André; Maluf,Wilson Roberto; Ticona-Benavente,César Augusto; Nogueira,Douglas William; Nogueira,Danilo Gustavo.
ABSTRACT The aim of this study was to quantify and assess the components of heterosis in paprika hybrids related to yield, capsanten pigment content (estimated as ASTA degrees) and resistance to Phytophthora capsici, and to identify parental lines with high general combining ability (GCA) to be used in future breeding programmes and/or to obtain new hybrids. Fifteen hybrids were obtained through a complete diallel cross (reciprocal hybrids excluded) among six proprietary paprika breeding lines from HortiAgro Sementes S.A., four of which originally introduced from Peru (P1=PIM 032-03; P2=PIM 033-11; P3=PIM 034-19; P4=PIM 035-01) and two from the U.S.A. (P5=PIM 036-08; P6=PIM 037-18). Epistatic gene action was involved in the expression of heterosis for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; General combining ability; Phytophthora capsici; Hybrid vigor; Gene action; Epistasis.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200282

Comparison of three tester parents in evaluating popcorn families derived from IAC-125
Provedor de dados: 124
Autores: Miotto,Acácio Antonio; Pinto,Ronald José Barth; Scapim,Carlos Alberto; Matias Junior,José Lidércio; Coan,Marlon Mathias Dacal; Silva,Hingrid Ariane da.
ABSTRACT Thirty-eight S3 families obtained by selfing from IAC-125 popcorn hybrid were evaluated by three different topcross tester parents: an inbred line P3.3- S7 generation taken from popcorn population CMS-42, an open-pollinated variety BRS Angela and the commercial three-way hybrid Jade. Manual crossings were performed according to a partial diallel mating design. Topcross hybrids were evaluated in individual experiments for each tester carried out in randomized block designs with three replications in two locations (Maringá-Paraná and Sabáudia-Paraná). The results for grain yield and popping expansion were gathered in a combined analysis. Estimates of general and specific combining ability were obtained according to Griffing's methodology (1956),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Topcross; Popping expansion; General combining ability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300564

ผลของการใช้พันธุ์ทดสอบสำหรับการประเมินสายพันธุ์ข้าวโพดข้าวเหนียวในขั้นตอนการปรับปรุงพันธุ์ลูกผสม
Provedor de dados: 106
Autores: Eakrin Sarepoua; Kamol Lertrat; Bhalang Suriharn.
Choice of tester is important in the evaluation of lines for potential use in production hybrids. The objectives of this study were to determine the relative merits of two types of testers for evaluating waxy corn lines and 2) to evaluate waxy corn breeding lines in a hybrid development program. Eighteen S2 lines were crossed to two genetically narrow-base testers, inbred “101L” and hybrid “BW854” and to two genetically broad-base testers, “SLE” and “VNLE” in North Carolina mating design I. The parental lines and their 72 crosses were evaluated using Randomized Complete Block Design with 3 replications in the rainy season (May-August) 2010 at experimental Farm of Khon Kaen University. The results indicated that narrow genetic base tester can be effectively...
Tipo: Collection
Palavras-chave: Waxy corn; General combining ability; Inbred line extraction; ข้าวโพดข้าวเหนียว; การปรับปรุงพันธุ์ลูกผสม; ความสามารถในการรวมตัวทั่วไป; การสกัดสายพันธุ์แท้; พันธุ์ทดสอบ; พันธุกรรม.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5156

Combining ability analysis for yield and yield components in bold grained rice (Oryza sativa L.) of Assam
Provedor de dados: 109
Autores: Chakraborty,R; Chakraborty,Supriyo; Dutta,B.K.; Paul,S.B.
Combining ability analysis for grain yield and its components was carried out in eight parental diallel crosses of bold grained rice excluding reciprocals. The general combining ability (GCA) and specific combining ability (SCA) effects were significant for all the characters indicating the importance of both additive and non-additive gene effects in their inheritance. The parents Ranjit followed by Matonga and Monohar Sali contributed significantly to high GCA effect towards high grain yield per hill. The superior specific cross combinations for high grain yield per hill were Matonga/Bar Madhava, originated from high x low GCA combination followed by Dhola Mula/ Ranjit (low x high gca), Chandmoni/Hathi Sali (low x high GCA), Dhola Mula/Mala (low x low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: General combining ability; Bold grained rice; Yield component; Yield.
Ano: 2009
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122009000100002

Genetic variability in popcorn synthetic population
Provedor de dados: 1
Autores: Oliveira, Gustavo Hugo Ferreira de; Amaral, Camila; Revolti, Lucas Tadeu Mazza; Buzinaro, Rodolfo; Moro, Gustavo Vitti.
The Brazilian popcorn has low genetic variability and the successful development of advanced lines, new popcorn cultivars with high grain yield (GY) and expansion volume (PE) is dependent on parental selection and precise determination of heterotic groups. The aim of this study was to evaluate genetic variability and identify heterotic groups in synthetic populations of popcorn, using diallel crosses. Thus, nine synthetic populations were crossed using complete diallel scheme. The GY and PE traits of 36 hybrids and reciprocals were evaluated in a randomized complete block design with 72 treatments and two replicates in two years. The effects of non-additive genes were the most important in the genetic control of these traits, indicating a favorable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; General combining ability; Specific combining ability; Diallel.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39497

Diallel analysis of maize hybrids for agronomic and bromatological forage traits
Provedor de dados: 1
Autores: Mendes, Matheus Henrique Silveira; Pereira, Carlos Henrique; Souza, João Cândido de.
The aim of this study was to evaluate a diallel of maize hybrids for traits related to forage production and nutritional value. Six commercial hybrids were used as parents. The crosses were made according to a complete diallel design, obtaining the F1 and reciprocal crosses. The evaluations were performed in the main and second crop seasons in the 2010/2011 crop year at the Center for Technological Development in Agriculture of the Federal University of Lavras, located in Lavras, Minas Gerais State, Brazil. The experimental precision indicated by the coefficient of variation was good for all the traits measured. Significant differences were not observed among the crosses for traits related to the nutritional value of the forage. For fresh matter yield and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mating designs; General combining ability; Specific combining ability; Interaction genotypes x environments.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19329

Genetic variability in popcorn synthetic population
Provedor de dados: 1
Autores: Oliveira, Gustavo Hugo Ferreira de; Amaral, Camila; Revolti, Lucas Tadeu Mazza; Buzinaro, Rodolfo; Moro, Gustavo Vitti.
The Brazilian popcorn has low genetic variability and the successful development of advanced lines, new popcorn cultivars with high grain yield (GY) and expansion volume (PE) is dependent on parental selection and precise determination of heterotic groups. The aim of this study was to evaluate genetic variability and identify heterotic groups in synthetic populations of popcorn, using diallel crosses. Thus, nine synthetic populations were crossed using complete diallel scheme. The GY and PE traits of 36 hybrids and reciprocals were evaluated in a randomized complete block design with 72 treatments and two replicates in two years. The effects of non-additive genes were the most important in the genetic control of these traits, indicating a favorable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; General combining ability; Specific combining ability; Diallel.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39497

Potential of pepper plant accessions for ornamental purposes using diallel analysis
Provedor de dados: 42
Autores: PESSOA,ANGELA M.S.; RÊGO,ELIZANILDA R. DO; SANTOS,CRISTINE A.P. DOS; CARVALHO,MICHELLE G. DE; MESQUITA,JÚLIO C.P. DE; RÊGO,MAILSON M. DO.
Abstract: The genus Capsicum is cultivated in various parts of the world, with C. annuum showing high diversity and potential for ornamental purposes and genetic improvement. The aim of this work was to evaluate the combining ability and heterosis of seedling and plant traits in accessions of ornamental pepper and their hybrids. Seven accessions of C. annuum were handcrossed and twelve quantitative plant traits were evaluated. The data were subjected to analysis of variance, the Scott-Knott test and diallel analysis using Griffing’s method I (fixed model). Heterosis and its components were also determined. Non-additive effects were found for seedling height, cotyledonous leaf length and width; stem diameter and chlorophyll b content. All other traits...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; Heterosis; General combining ability; Specific combining ability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700870

Heterosis and combining ability analyses from the partial diallel
Provedor de dados: 53
Autores: Viana,José Marcelo Soriano.
This study discusses from the theoretical standpoint the analyses of heterosis and combining ability from the partial diallel. Aiming at to investigate the information provided by the genetic parameters, simulation studies were realized. The genetic model adjusted considered one gene, groups of six populations, three degrees of dominance (|d/a| equal to 0.5, 1 and 2, representing partial, complete and overdominance) and random allelic frequencies. For each degree of dominance 50 replications were performed. The model for heterosis analysis does not need to be restricted. The unrestricted model gives the same information as the restricted one. The model for combining ability is restricted. The restrictions of the partial-G2 model of GERALDI and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Average heterosis; Variety heterosis; Specific heterosis; General combining ability; Specific combining ability.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052007000100007