Seleção de progênies de eucalipto pelo índice Z por MQM e Blup

Reis, Cristiane Aparecida Fioravante; Gonçalves, Flávia Maria Avelar; Ramalho, Magno Antônio Patto; Rosado, Antônio Marcos

doi:10.1590/s0100-204x2011000500009

Cited by 10 publications

(14 citation statements)

References 20 publications

(19 reference statements)

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“…The Z-index has been used recently because it is easy to obtain, ANOVA can be carried out, and the values compared statistically since it is easy to interpret, especially using graphic analysis (Menezes Jr. et al, 2008;Mendes et al, 2009;Reis et al, 2011). In the present study, using the Z-index made it possible to verify the implication of the progeny x environment interaction in the selection of more than 1 trait simultaneously.…”

Section: Discussionmentioning

confidence: 83%

Implications of the progeny x environment interaction in selection index involving characteristics of the common bean

Lima¹,

Ramalho²,

Abreu³

2012

Genet. Mol. Res.

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ABSTRACT. Breeders normally select simultaneously for several traits in various environments. We investigated the effects of the progeny x environment interaction on success in selection for several traits. The population used was obtained from a cross between the CVIII-85-11 line, which has a semi-erect to prostrate plant architecture and a cream with brown streaks bean type, and the BRS-Supremo cultivar, which has an erect plant architecture and black grains. In experiments conducted in the field, 47 progenies F 4:6 and F 4:7 were evaluated for two seasons for grain yield, plant architecture and grain type score. The variables were standardized and we obtained the sum of Z. The components of genetic variance in the average of the two environments were nil due to the progeny x environment interaction, which would hinder successful simultaneous selection of characters.

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Section: Discussionmentioning

confidence: 83%

Implications of the progeny x environment interaction in selection index involving characteristics of the common bean

Lima¹,

Ramalho²,

Abreu³

2012

Genet. Mol. Res.

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“…For eucalyptus, this Z index allowed to graphically observe in which characteristics the progeny presented any deficiency (Reis et al, 2011). Also with eucalyptus, Reis et al (2015) concluded that the sum of Z of the standardized variables is a good alternative for simultaneous selection of many characteristics in the forestry sector.…”

Section: When Analyzing Interactions T X L and L X Ymentioning

confidence: 98%

Adaptability and stability of soybean cultivars for grain yield and seed quality

et al. 2017

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ABSTRACT. This study aimed at verifying the adaptability and stability of soybean cultivars, considering the grain yield and quality of seeds, adopting univariate and multivariate approaches. The experiments were conducted in two crops, three environments, in 2013/2014 and 2014/2015 crop seasons, in the county of Inconfidentes, Lavras, and Patos de Minas, in the Minas Gerais State, Brazil. We evaluated 17 commercial soybean cultivars. For adaptability and stability evaluations, the Graphic and GGE biplot methods were employed. Previously, a selection index was estimated based on the sum of the standardized variables (Z index). The data relative to grain yield, mass of one thousand grain, uniformity test (sieve retention), and germination test were standardized (Z ij ) per cultivar. With the sum of Z ij , we obtained the selection index for the four traits evaluated together. In the Graphic method evaluation, cultivars NA 7200 RR and CD 2737 RR presented the highest values for selection index Z. By the GGE biplot method, we verified that cultivar NA 7200 RR presented greater stability in both univariate evaluations, for grain yield, and for selection index Z.

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“…O índice Z permite padronizar os dados a serem utilizados como uma alternativa à seleção e não necessita de estimativas de covariâncias genéticas e fenotípicas (Ramalho et al, 2012). Entretanto, o índice Z é composto pela soma das variáveis Z, e estas podem assumir tanto um valor negativo quanto um positivo, o que dificultaria a análise do melhorista (Reis et al, 2011). Uma alternativa para se obter um índice composto pelas variáveis de interesse, que apresente valores exclusivamente positivos, seria a padronização das variáveis pela média.…”

Section: Introductionunclassified

Seleção simultânea em progênies de sorgo-sacarino por meio de índices de seleção

França

Parrella

Souza

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi comparar ganhos genéticos obtidos por diferentes índices de seleção aplicados a múltiplos caracteres agronômicos de sorgo-sacarino (Sorghum bicolor). Foram feitas avaliações de 189 progênies F5 e sete testemunhas, em delineamento de blocos incompletos, com três repetições. Mensuraram-se os caracteres produtividade de matéria verde, teor de sólidos solúveis totais, extração de caldo, teor de sacarose no caldo e sólidos solúveis totais por hectare. Analisaram-se os índices de soma de postos de Mulamba e Mock (ou índice de ranks), da soma dos valores padronizados (ou índice Z), índice padronizado pela média e índice padronizado pela média modificado. As correlações e as percentagens de coincidência na seleção das progênies foram elevadas entre o índice Z, o índice padronizado pela média e o índice padronizado pela média modificado. Entre os índices de seleção testados, o de soma de postos de Mulamba e Mock foi o menos eficiente. A seleção simultânea de progênies de sorgo-sacarino permite ganhos genéticos expressivos para todos os caracteres mensurados.Termos para indexação: Sorghum bicolor, ganho genético, melhoramento genético de plantas. Simultaneous selection in sweet sorghum progenies by selection indicesAbstract -The objective of this work was to compare the genetic gains obtained by different selection indices applied to various agronomic traits of sweet sorghum (Sorghum bicolor). Evaluations were carried out for 189 F5 progenies and seven controls, in an incomplete block design, with three replicates. The measured traits were green matter yield, content of total soluble solids, juice extraction, sucrose content in juice, and total soluble solids per hectare. The rank summation index of Mulamba and Mock (or index of ranks), standardized value summation index (or Z index), standardized by the mean index, and the modified standardized by the mean index were analyzed. The correlations and coincidence percentages in the progeny selections were high between the Z index, the standardized by the mean index, and the modified standardized by the mean index. Among the tested selection indices, the rank summation index of Mulamba and Mock was the less efficient. The simultaneous selection of sweet sorghum progenies allows expressive genetic gains for all measured traits.

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Seleção de progênies de eucalipto pelo índice Z por MQM e Blup

Cited by 10 publications

References 20 publications

Implications of the progeny x environment interaction in selection index involving characteristics of the common bean

Implications of the progeny x environment interaction in selection index involving characteristics of the common bean

Adaptability and stability of soybean cultivars for grain yield and seed quality

Seleção simultânea em progênies de sorgo-sacarino por meio de índices de seleção

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