Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex
Soybean genotypes resistant to stink bugs are derived from complex breeding processes obtained through indirect selection. The aim of the present work was to estimate genetic parameters for guiding selection strategies towards resistant genotypes, based on those traits associated with responses to p...
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Sociedade Brasileira de Genética
2009-01-01
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doaj-43efbede18874a7c93ec517be4d2dc0e2020-11-25T02:17:49ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1415-47571678-46852009-01-0132232833610.1590/S1415-47572009000200020Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complexCláudio Roberto Cardoso de GodoiJosé Baldin PinheiroSoybean genotypes resistant to stink bugs are derived from complex breeding processes obtained through indirect selection. The aim of the present work was to estimate genetic parameters for guiding selection strategies towards resistant genotypes, based on those traits associated with responses to pod-attacking stink bugs, such as the grain filling period (GFP), leaf retention (LR), percentage index of pod damage (PIPD) and percentage of spotted seeds (PSS). We assessed the parental lines IAC-100 (resistant) and FT-Estrela (susceptible), the progenies F2 and F4, 30 progenies F2:3, 30 progenies BC1F2:3 and 30 progenies BC2F2:3, besides the cultivars BRS Celeste and MGBR-46 (Conquista). Three field experiments, using randomized complete block design with three replications, were installed in Goiânia-GO, in the 2002/03 season. Each experiment consisted of 36 treatments (6 common and 30 regular). Heritability estimates were: 74.6 and 36.1 (GFP); 51.9 and 19.9 (LR); 49.6 and 49.6 (PIPD) and 55.8 and 20.3 (PSS), in both the broad and narrow senses, respectively. Based on these results, we concluded that the best strategy for obtaining stink bug-resistant genotypes consists of selecting the PIPD trait in early generations (F3 or F4), followed by selection for the GFP, LR and PSS traits in generations with higher endogamy levels.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200020Glycine maxinsect resistancestink bugsheritability |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Cláudio Roberto Cardoso de Godoi José Baldin Pinheiro |
spellingShingle |
Cláudio Roberto Cardoso de Godoi José Baldin Pinheiro Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex Genetics and Molecular Biology Glycine max insect resistance stink bugs heritability |
author_facet |
Cláudio Roberto Cardoso de Godoi José Baldin Pinheiro |
author_sort |
Cláudio Roberto Cardoso de Godoi |
title |
Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex |
title_short |
Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex |
title_full |
Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex |
title_fullStr |
Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex |
title_full_unstemmed |
Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex |
title_sort |
genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex |
publisher |
Sociedade Brasileira de Genética |
series |
Genetics and Molecular Biology |
issn |
1415-4757 1678-4685 |
publishDate |
2009-01-01 |
description |
Soybean genotypes resistant to stink bugs are derived from complex breeding processes obtained through indirect selection. The aim of the present work was to estimate genetic parameters for guiding selection strategies towards resistant genotypes, based on those traits associated with responses to pod-attacking stink bugs, such as the grain filling period (GFP), leaf retention (LR), percentage index of pod damage (PIPD) and percentage of spotted seeds (PSS). We assessed the parental lines IAC-100 (resistant) and FT-Estrela (susceptible), the progenies F2 and F4, 30 progenies F2:3, 30 progenies BC1F2:3 and 30 progenies BC2F2:3, besides the cultivars BRS Celeste and MGBR-46 (Conquista). Three field experiments, using randomized complete block design with three replications, were installed in Goiânia-GO, in the 2002/03 season. Each experiment consisted of 36 treatments (6 common and 30 regular). Heritability estimates were: 74.6 and 36.1 (GFP); 51.9 and 19.9 (LR); 49.6 and 49.6 (PIPD) and 55.8 and 20.3 (PSS), in both the broad and narrow senses, respectively. Based on these results, we concluded that the best strategy for obtaining stink bug-resistant genotypes consists of selecting the PIPD trait in early generations (F3 or F4), followed by selection for the GFP, LR and PSS traits in generations with higher endogamy levels. |
topic |
Glycine max insect resistance stink bugs heritability |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200020 |
work_keys_str_mv |
AT claudiorobertocardosodegodoi geneticparametersandselectionstrategiesforsoybeangenotypesresistanttothestinkbugcomplex AT josebaldinpinheiro geneticparametersandselectionstrategiesforsoybeangenotypesresistanttothestinkbugcomplex |
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