A Breeding Procedure Designed To Make Maximum Use of Both General and Specific Combining Ability<sup>1</sup>

Comstock, R. E.; Robinson, H. F.; Harvey, P. H.

doi:10.2134/agronj1949.00021962004100080006x

Cited by 409 publications

(264 citation statements)

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“…Idealizado por Comstock et al (1949), como um processo de melhoramento de duas populações e do híbrido entre elas, a seleção recorrente recíproca (SRR) com famílias de meios-irmãos paternos interpopulacionais e a recombinação de progênies S 1 têm proporcionado, na maioria dos casos, resultados favoráveis -com milho e milho-pipoca -, em relação à produção, resistência a pragas e doenças, resistência ao acamamento, entre outros caracteres (Keeratinijakal & Lamkey, 1993;Rademacher et al, 1999;Butron et al, 2000). A mesma afirmação pode ser feita em relação às modificações do método realizadas por Paterniani (1967), que sugeriu o uso de famílias de meios-irmãos maternos interpopulacionais e recombinação de progênies de meios-irmãos; e por Lonnquist & Williams (1967) e Hallauer & Eberhart (1970), que propuseram o emprego de progênies de irmãos-completos interpopulacionais e recombinação de famílias S 1 , para o melhoramento das populações e do híbrido, e de famílias de irmãos-completos interpopulacionais endogâmicas, para a obtenção de híbridos de linhagens.…”

Section: Introductionunclassified

Seleção recorrente recíproca na obtenção de híbridos interpopulacionais de milho-pipoca

Faria

Viana

Sobreira

et al. 2008

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a eficiência da seleção recorrente recíproca em produzir híbridos de milho-pipoca (Zea mays) de progênies endógamas superiores, com famílias de irmãos-completos. O programa de seleção recorrente recíproca envolveu as populações de milho-pipoca 'Viçosa' e 'Beija-Flor'. Os testes dos híbridos S 0 xS 0 e S 1 xS 1 foram conduzidos em delineamento látice, nos anos agrícolas de 2002/2003 e 2004/2005. Os dois ensaios incluíram testemunhas comerciais comuns, que permitiram a comparação do desempenho dos híbridos. Analisaram-se a produtividade e a capacidade de expansão. Foram preditos ganhos direto e indireto com a seleção em capacidade de expansão, avaliada em pipoqueira de ar quente e na pipocadora "Metric Weight Volume Tester". Os ganhos observados foram calculados para avaliar a eficiência da seleção recorrente recíproca. As análises de covariância mostraram variabilidade genotípica nas populações. Em relação às testemunhas comerciais, os híbridos S 0 xS 0 foram inferiores em qualidade e equivalentes em produtividade, e os híbridos S 1 xS 1 foram equivalentes nas duas características. O ganho observado na capacidade de expansão foi substancial, cerca de 4 mL g -1 , superior ao ganho predito (2,8 mL g -1 ). A redução observada na produtividade não foi relevante. Verificou-se redução na variabilidade genotípica quanto à capacidade de expansão. O método de seleção recorrente recíproca foi eficiente em produzir híbridos S 1 xS 1 superiores aos S 0 xS 0 .Termos para indexação: Zea mays, famílias de irmãos-completos interpopulacionais, ganho genético, método dos híbridos crípticos. Reciprocal recurrent selection to obtain interpopulation hybrids of popcornAbstract -The objective of this work was to evaluate the efficiency of reciprocal recurrent selection in producing hybrids of popcorn (Zea mays) from superior endogamous progenies, with full-sibling families. The reciprocal recurrent selection program involved the 'Viçosa' and 'Beija-Flor' popcorn populations. Tests of the hybrids S 0 xS 0 and S 1 xS 1 were carried out in lattice design, in the agricultural years 2002/2003 and 2004/2005. The two assays included common commercial controls, allowing for the comparison of the hybrids performance. Productivity and expansion capacity were evaluated. Direct and indirect gains with selection were predicted on expansion capacity assessed in hot air and Metric Weight Volume Tester popcorn makers. The gains observed were calculated to evaluate the efficiency of the reciprocal recurrent selection. The covariance analyses showed genotypic variability in the populations. When compared to the commercial controls, the S 0 xS 0 hybrids were inferior in quality and equivalent in productivity; and the S 1 xS 1 hybrids were equivalent in both traits. The observed gain in expansion capacity was substantial (around 4 mL g -1 ) and higher than the predicted gain (2.8 mL g -1 ). The reduction observed in productivity was not relevant. Reduction in the genotypic variability was verified for expansi...

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Section: Introductionunclassified

Seleção recorrente recíproca na obtenção de híbridos interpopulacionais de milho-pipoca

Faria

Viana

Sobreira

et al. 2008

Pesq. agropec. bras.

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“…As pointed out by Schnell (1961), this may seem surprising since reciprocal selection was designed to make maximum use of both general and specific combining ability (Comstock, Robinson, and Harvey 1949). However, it is true that reciprocal selection, eventually, does isolate and capitalize on exceptional gene combinations at overdominant loci in the hybrid population.…”

Section: Discussionmentioning

confidence: 99%

“…Ever since the reciprocal selection method was suggested (Comstock, Robinson, and Harvey 1949), considerable interest has been manifest in comparing it in various ways with other methods of selection. Such comparisons have been in theoretical terms (Comstock, Robinson, and Harvey 1949;Dickerson 1952;and Schnell 1961), and in terms of actual experiments (Bell, Moore, and Warren 1955;Rasmusson 1956;and Douglas et al 1961).…”

Section: Introductionmentioning

confidence: 99%

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Prediction Formulae for General Combining Ability Selection Methods Utilizing One or Two Random-Mating Populations

Griffing¹

1962

Aust. Jnl. Of Bio. Sci.

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SummaryThis study is the first of a series in which theoretical comparisons are made among various general combining ability and specific combining ability selection methods. The particular purpose of this study is to set out the prediction formulae for all possible general combining ability selection methods which can be generated by one or two base populations.Prediction formulae are considered for various levels of genetic complexity; a single locus, two linked loci, and a generalized, genetic situation.To extend the prediction process to include a general combining ability selection procedure involving two different base populations, it is necessary to extend the gene model and variance partitioning to accommodate the hybrid population, and to define certain covariances between similar elements in different populations.When this is done, it is possible to predict the consequences of n cycles of selection followed by t generations of random mating without selection for each selection method. With the two·locus model it is possible to show how linkage and the additive X additive component of epistasis (as well as the additive genetic variance) enter into the prediction formulae when selection is applied. It is also possible to show, on relaxation from selection, that the disturbances due to linkage and epistasis tend to disappear.With the completely general genetic situation, it is demonstrated that the response to selection is a function of covariances among half· sibs. These parameters are defined either in a single population, or as a sum of cross-products involving two different populations, depending on the selection method involved.

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“…The breeding method under critical examination in the entire work is reciprocal recurrent selection (RRS) as proposed by Comstock, Robinson and Harvey (14). The study is composed of two broad parts: (1) a theoretical development, The goal is to present relationships which will permit the breeder to modify the existing breeding methods to better fill his specific needs.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and simulated selection studies based on progeny performance with special reference to reciprocal recurrent selection

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A Breeding Procedure Designed To Make Maximum Use of Both General and Specific Combining Ability¹

Cited by 409 publications

References 3 publications

Seleção recorrente recíproca na obtenção de híbridos interpopulacionais de milho-pipoca

Seleção recorrente recíproca na obtenção de híbridos interpopulacionais de milho-pipoca

Prediction Formulae for General Combining Ability Selection Methods Utilizing One or Two Random-Mating Populations

Theoretical and simulated selection studies based on progeny performance with special reference to reciprocal recurrent selection

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A Breeding Procedure Designed To Make Maximum Use of Both General and Specific Combining Ability1

Cited by 409 publications

References 3 publications

Seleção recorrente recíproca na obtenção de híbridos interpopulacionais de milho-pipoca

Seleção recorrente recíproca na obtenção de híbridos interpopulacionais de milho-pipoca

Prediction Formulae for General Combining Ability Selection Methods Utilizing One or Two Random-Mating Populations

Theoretical and simulated selection studies based on progeny performance with special reference to reciprocal recurrent selection

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A Breeding Procedure Designed To Make Maximum Use of Both General and Specific Combining Ability¹