Identification of drought-tolerant corn genotypes by multivariate analysis
The identification of genotypes that are tolerant to water deficit is crucial for the maintenance of the agricultural production. This study aimed to evaluate the genotypic variation for drought tolerance among corn genotypes by means of multivariate analysis, as well as to identify hybrids with hig...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Goiás
2018-09-01
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| Series: | Pesquisa Agropecuária Tropical |
| Subjects: | |
| Online Access: | https://www.revistas.ufg.br/pat/article/view/52122/25873 |
| _version_ | 1828230402448293888 |
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| author | Ricardo Silva de Sousa Edson Alves Bastos Milton José Cardoso Diléia Rocha Pereira |
| author_facet | Ricardo Silva de Sousa Edson Alves Bastos Milton José Cardoso Diléia Rocha Pereira |
| author_sort | Ricardo Silva de Sousa |
| collection | DOAJ |
| description | The identification of genotypes that are tolerant to water deficit is crucial for the maintenance of the agricultural production. This study aimed to evaluate the genotypic variation for drought tolerance among corn genotypes by means of multivariate analysis, as well as to identify hybrids with high grain yield under conditions of water deficit and full irrigation. For this purpose, an experiment was conducted in a randomized block design, with 36 corn hybrids, being 34 experimental elite and two commercial (controls) hybrids, under water deficit and full irrigation, during the reproductive stage, with four replications. The irrigation levels, added to the rainfall, totaled 691.6 mm under full irrigation and 490.8 mm under water deficit. The evaluation encompassed the leaf area index, leaf chlorophyll content, interval between male and female flowering, number of rows per ear, number of grains per ear, ear length, 100-grain weight, ear yield, ear index, total number of grains, number of ears per m2, grain yield at 13 % of moisture and water-use efficiency. The evaluated hybrids showed useful genetic diversity for drought tolerance. Four experimental elite hybrids (3G7395, 3G7415, 1G7034 and 3G7335) stood out under water deficit, showing a high grain yield performance, if compared to the average of the control hybrids. |
| first_indexed | 2024-04-12T18:47:57Z |
| format | Article |
| id | doaj.art-35abb8c6aa734516815bcff196a2f834 |
| institution | Directory Open Access Journal |
| issn | 1983-4063 |
| language | English |
| last_indexed | 2024-04-12T18:47:57Z |
| publishDate | 2018-09-01 |
| publisher | Universidade Federal de Goiás |
| record_format | Article |
| series | Pesquisa Agropecuária Tropical |
| spelling | doaj.art-35abb8c6aa734516815bcff196a2f8342022-12-22T03:20:33ZengUniversidade Federal de GoiásPesquisa Agropecuária Tropical1983-40632018-09-0148320421110.1590/1983-40632018v4852122Identification of drought-tolerant corn genotypes by multivariate analysisRicardo Silva de Sousa0Edson Alves Bastos1Milton José Cardoso2Diléia Rocha Pereira3Universidade Federal do Piauí, Teresina, PI, Brasil.Empresa Brasileira de Pesquisa Agropecuária (Embrapa Meio-Norte), Teresina, PI, Brasil.Empresa Brasileira de Pesquisa Agropecuária (Embrapa Meio-Norte), Teresina, PI, Brasil.Universidade Federal do Piauí, Teresina, PI, Brasil.The identification of genotypes that are tolerant to water deficit is crucial for the maintenance of the agricultural production. This study aimed to evaluate the genotypic variation for drought tolerance among corn genotypes by means of multivariate analysis, as well as to identify hybrids with high grain yield under conditions of water deficit and full irrigation. For this purpose, an experiment was conducted in a randomized block design, with 36 corn hybrids, being 34 experimental elite and two commercial (controls) hybrids, under water deficit and full irrigation, during the reproductive stage, with four replications. The irrigation levels, added to the rainfall, totaled 691.6 mm under full irrigation and 490.8 mm under water deficit. The evaluation encompassed the leaf area index, leaf chlorophyll content, interval between male and female flowering, number of rows per ear, number of grains per ear, ear length, 100-grain weight, ear yield, ear index, total number of grains, number of ears per m2, grain yield at 13 % of moisture and water-use efficiency. The evaluated hybrids showed useful genetic diversity for drought tolerance. Four experimental elite hybrids (3G7395, 3G7415, 1G7034 and 3G7335) stood out under water deficit, showing a high grain yield performance, if compared to the average of the control hybrids.https://www.revistas.ufg.br/pat/article/view/52122/25873Multivariate discriminationwater stresschlorophyllleaf area index |
| spellingShingle | Ricardo Silva de Sousa Edson Alves Bastos Milton José Cardoso Diléia Rocha Pereira Identification of drought-tolerant corn genotypes by multivariate analysis Pesquisa Agropecuária Tropical Multivariate discrimination water stress chlorophyll leaf area index |
| title | Identification of drought-tolerant corn genotypes by multivariate analysis |
| title_full | Identification of drought-tolerant corn genotypes by multivariate analysis |
| title_fullStr | Identification of drought-tolerant corn genotypes by multivariate analysis |
| title_full_unstemmed | Identification of drought-tolerant corn genotypes by multivariate analysis |
| title_short | Identification of drought-tolerant corn genotypes by multivariate analysis |
| title_sort | identification of drought tolerant corn genotypes by multivariate analysis |
| topic | Multivariate discrimination water stress chlorophyll leaf area index |
| url | https://www.revistas.ufg.br/pat/article/view/52122/25873 |
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