Genetic characterization of the 28 maize landraces in Paraná State
The characterization of maize landraces is extremely important in breeding programs for use of these genotypes as sources of genetic variability. The objective of this study was to quantitatively characterize 28 populations of maize landraces from the state of Paraná using the estimates of the effec...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Londrina
2017-08-01
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| Series: | Semina: Ciências Agrárias |
| Subjects: | |
| Online Access: | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/26389 |
| _version_ | 1818535884476121088 |
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| author | Sara Regina Silvestrin Rovaris Pedro Mário de Araújo Deoclécio Domingos Garbuglio Cleber Vinicius Guiaretta de Azevedo Cássio Egídio Cavenaghi Prete |
| author_facet | Sara Regina Silvestrin Rovaris Pedro Mário de Araújo Deoclécio Domingos Garbuglio Cleber Vinicius Guiaretta de Azevedo Cássio Egídio Cavenaghi Prete |
| author_sort | Sara Regina Silvestrin Rovaris |
| collection | DOAJ |
| description | The characterization of maize landraces is extremely important in breeding programs for use of these genotypes as sources of genetic variability. The objective of this study was to quantitatively characterize 28 populations of maize landraces from the state of Paraná using the estimates of the effects of varieties and heterosis parents and the general combining ability, thereby assessing the main agronomic traits. In the crop of 2008/09, 56 inter-varietal hybrids, obtained through a topcross, 28 populations of maize landraces and three check varieties were evaluated for female flowering (FF), plant height (PH), ear height (EH) and grain mass (GY). The treatments were evaluated in a randomized block design, with two replications, at three Paraná State locations: the Experimental Center of the Agronomic Institute of Paraná in Londrina (IAPAR) and the experimental units of Pato Branco and Ponta Grossa. The data were submitted to an analysis of variance, considering a fixed model for genotypes and a random model for environments; the averages grouped by the Scott-Knott test, along with intersections of topcrosses, were analyzed according to a readapted model proposed by Oliveira et al. (1997). According to estimates of the parental effects, the GI 133 population showed the most promising estimates for all characteristics. The GI 088 and GI 173 populations stood out with promising estimates of the effects of heterosis. The conclusion is that the populations GI 133 and GI 173 may be indicated for recurrent selection programs or participation in obtaining composites. |
| first_indexed | 2024-12-11T18:30:52Z |
| format | Article |
| id | doaj.art-98914e0e81da4293a0bd7e8fd44d4790 |
| institution | Directory Open Access Journal |
| issn | 1676-546X 1679-0359 |
| language | English |
| last_indexed | 2024-12-11T18:30:52Z |
| publishDate | 2017-08-01 |
| publisher | Universidade Estadual de Londrina |
| record_format | Article |
| series | Semina: Ciências Agrárias |
| spelling | doaj.art-98914e0e81da4293a0bd7e8fd44d47902022-12-22T00:54:56ZengUniversidade Estadual de LondrinaSemina: Ciências Agrárias1676-546X1679-03592017-08-013841715172610.5433/1679-0359.2017v38n4p171515521Genetic characterization of the 28 maize landraces in Paraná StateSara Regina Silvestrin Rovaris0Pedro Mário de Araújo1Deoclécio Domingos Garbuglio2Cleber Vinicius Guiaretta de Azevedo3Cássio Egídio Cavenaghi Prete4Instituto AgronômicoInstituto Agronômico do ParanáInstituto Agronômico do ParanáFaculdade de Ciências Agrárias e Veterinárias de JaboticabalUniversidade Estadual de LondrinaThe characterization of maize landraces is extremely important in breeding programs for use of these genotypes as sources of genetic variability. The objective of this study was to quantitatively characterize 28 populations of maize landraces from the state of Paraná using the estimates of the effects of varieties and heterosis parents and the general combining ability, thereby assessing the main agronomic traits. In the crop of 2008/09, 56 inter-varietal hybrids, obtained through a topcross, 28 populations of maize landraces and three check varieties were evaluated for female flowering (FF), plant height (PH), ear height (EH) and grain mass (GY). The treatments were evaluated in a randomized block design, with two replications, at three Paraná State locations: the Experimental Center of the Agronomic Institute of Paraná in Londrina (IAPAR) and the experimental units of Pato Branco and Ponta Grossa. The data were submitted to an analysis of variance, considering a fixed model for genotypes and a random model for environments; the averages grouped by the Scott-Knott test, along with intersections of topcrosses, were analyzed according to a readapted model proposed by Oliveira et al. (1997). According to estimates of the parental effects, the GI 133 population showed the most promising estimates for all characteristics. The GI 088 and GI 173 populations stood out with promising estimates of the effects of heterosis. The conclusion is that the populations GI 133 and GI 173 may be indicated for recurrent selection programs or participation in obtaining composites.http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/26389Efeitos de variedadeEfeitos de heterosePré-melhoramentoZea mays L. |
| spellingShingle | Sara Regina Silvestrin Rovaris Pedro Mário de Araújo Deoclécio Domingos Garbuglio Cleber Vinicius Guiaretta de Azevedo Cássio Egídio Cavenaghi Prete Genetic characterization of the 28 maize landraces in Paraná State Semina: Ciências Agrárias Efeitos de variedade Efeitos de heterose Pré-melhoramento Zea mays L. |
| title | Genetic characterization of the 28 maize landraces in Paraná State |
| title_full | Genetic characterization of the 28 maize landraces in Paraná State |
| title_fullStr | Genetic characterization of the 28 maize landraces in Paraná State |
| title_full_unstemmed | Genetic characterization of the 28 maize landraces in Paraná State |
| title_short | Genetic characterization of the 28 maize landraces in Paraná State |
| title_sort | genetic characterization of the 28 maize landraces in parana state |
| topic | Efeitos de variedade Efeitos de heterose Pré-melhoramento Zea mays L. |
| url | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/26389 |
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