The Components of Genetic Variance in Populations of Biparental Progenies and Their Use in Estimating the Average Degree of Dominance

Robinson, H. F.

doi:10.2307/3001412

Cited by 553 publications

(355 citation statements)

References 7 publications

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“…Segundo Corrêa et al (2004), a região sul atingiu uma produção de 18.802,9 mil toneladas na soma O melhoramento de milho é dirigido essencialmente para atender duas alternativas: a)-obtenção de variedade de polinização livre; b)-obtenção de híbridos. A seleção recorrente recíproca busca, basicamente, aumentar a resposta heterótica entre duas populações.…”

Section: Introductionunclassified

Avaliação de híbridos intervarietais de milho por meio de cruzamento dialélico parcial, considerando quatro ambientes

Garbuglio

Araújo

2006

Sem. Ci. Agr.

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ResumoForam avaliados 12 híbridos intervarietais de milho (Zea mays L.), cruzados em esquema dialélico parcial 3 x 4 mais as sete populações parentais e 3 testemunhas. Os ensaios foram implantados nas estações experimentais do Iapar em Londrina, Pato Branco, Ponta Grossa e Guarapuava. O objetivo foi avaliar um conjunto de sete populações no sentido de se estimar parâmetros que venham a auxiliar na escolha de materiais para posteriores trabalhos com seleção recorrente, extração de linhagens e síntese de compostos. AbstractIn the summer season of 2004/2005, 12 intervarietal maize hybrids, crossed by the partial diallel scheme 3 x 4, the seven parental populations and three checks were evaluated at Iapar Experimental Stations in Londrina, Pato Branco, Ponta Grossa e Guarapuava. The objective was to identify crosses for future work with recurrent selection, inbred lines extraction and composite synthesis. For Heterosis variation cause, the differences were determined (P<0.01) for traits grain yield and female flowering, indicating that crosses were superior in relation to parentals. Regarding General Combining Ability values for yield, the parentals from Group-1, PC 9407 and BR 106, showed values of 36.7 kg.ha -1 and 171.1 kg.ha -1 , respectively, and the parentals from Group-2 presented values of 131.1 kg.ha -1 and 56.8 kg.ha -1 , respectively,. For Specific Combining Ability, the largest values were from PC 9701 x BR 106 (205.4 kg.ha -1 ) e PC 9502 x PC 9407 (135.3 kg.ha -1 ) and, the largest values of grain yield average (9297 e 9018 kg.ha -1 , respectively). The populations PC 9701, BR 106, PC 9502 and PC 9407 are promising sources for inbred lines extraction aiming to superior maize hybrids development, composite synthesis and recurrent selection.

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Section: Introductionunclassified

Avaliação de híbridos intervarietais de milho por meio de cruzamento dialélico parcial, considerando quatro ambientes

Garbuglio

Araújo

2006

Sem. Ci. Agr.

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“…The simulated genome was 1000.0 cM in total length and covered by 210 markers (10 chromosomes, each covered with twenty-one 5.0 cM equally spaced markers). Ten QTL were assumed, of which four (QTL 1 , QTL 2 , QTL 3 and QTL 6 ) had only main effects, and the other six had pairwise epistatic effects (QTL 4 and QTL 7 , QTL 5 and QTL 8 , and QTL 9 and QTL 10 interacted each other, respectively) ( Tables 3-6 and S5-S8). Two independent QTL (QTL 1 and QTL 2 ) and two interactive QTL (QTL 9 and QTL 10 ) were in linkage disequilibrium, respectively, and the other six QTL were located on different linkage group.…”

Section: Monte Carlo Simulation Studiesmentioning

confidence: 99%

“…Heterosis represents one of the most revolutionary advancements in crop improvement, i.e., maize [8] and rice [4]. In the genetic dissection of heterosis, NCIII design, proposed by Comstock and Robinson [9,10], is one of the most powerful and widely used mating schemes [11][12][13][14][15][16][17]. Therefore, the importance of heterosis necessitates an in-depth study of the NCIII design.…”

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confidence: 99%

Genome-wide mapping of QTL associated with heterosis in the RIL-based NCIII design

Zhang

2012

Chin. Sci. Bull.

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Heterosis represents one of the most revolutionary advancements in crop improvement. In the genetic dissection of heterosis, NCIII design is one of the most powerful and widely used mating schemes. However, the methodologies for quantitative trait loci (QTL) detection in the design were mostly based on composite interval mapping. Therefore, in this study, our purpose was to develop a statistical method for mapping epistatic QTL associated with heterosis in the RIL-based NCIII design. First, we derivated the expectations of two classical linear transformations, Z 1 and Z 2 , while a quantitative trait was controlled by two QTL with digenic epistasis and arbitrary linkage under the F ∞ and F 2 metric models. Then, we constructed an epistatic genetic model that includes all markers on the whole genome simultaneously, and estimated all the parameters in the model by the empirical Bayes approach. Finally, a series of Monte Carlo simulation experiments was carried out to confirm the proposed approach. The results show that: (1) all the augmented genetic parameters for main-effect QTL could be rightly identified with satisfactory statistical power and precision; (2) the statistical powers in the detection of augmented epistatic effects were substantively affected by the signs of pure epistatic effects; (3) it is more difficult to detect epistatic QTL than to detect main-effect QTL; (4) statistical power is higher in the RIL-based NCIII design than in the F 2 -based NCIII design, especially in the detection of the augmented epistatic effect that consists of two pure epistatic effects in opposite directions.empirical Bayes, epistasis, NCIII design, heterosis, quantitative trait locus, recombinant inbred line Citation:He X H, Hu Z L, Zhang Y M. Genome-wide mapping of QTL associated with heterosis in the RIL-based NCIII design.

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“…Twelve NDSU lines were crossed with 12 ex-PVP lines in the 2010 NDSU Fargo summer nursery following the North Carolina Mating Design II (NCII) (Comstock and Robinson 1948). The same 12 NDSU lines were crossed with another set of 12 ex-PVP lines, following a second NCII mating design at the 2010-2011 northern New Zealand winter nursery.…”

Section: Methodsmentioning

confidence: 99%

Identification of heterotic patterns between expired proprietary, NDSU, and industry short-season maize inbred lines

Bari

Carena

Pereira

2016

Crop Breed. Appl. Biotechnol.

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The Components of Genetic Variance in Populations of Biparental Progenies and Their Use in Estimating the Average Degree of Dominance

Cited by 553 publications

References 7 publications

Avaliação de híbridos intervarietais de milho por meio de cruzamento dialélico parcial, considerando quatro ambientes

Avaliação de híbridos intervarietais de milho por meio de cruzamento dialélico parcial, considerando quatro ambientes

Genome-wide mapping of QTL associated with heterosis in the RIL-based NCIII design

Identification of heterotic patterns between expired proprietary, NDSU, and industry short-season maize inbred lines

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