Resistance of Brazilian wheat cultivars to blast under controlled condition
ABSTRACT: The first report of wheat blast in the world was in Brazil, in 1986. Since then, a great effort has been made towards the development of wheat cultivars resistant to this disease, which is caused by the fungus Pyricularia oryzae Triticum (PoT). The objective of this research was to (i) eva...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2021-11-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700152&tlng=en |
| _version_ | 1798014410054172672 |
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| author | João Leodato Nunes Maciel Gustavo Bilíbio dos Santos Carlos Augusto Pizolotto Marcos Kovaleski Alieze Nascimento da Silva Carolina Cardoso Deuner Ivan Francisco Dressler da Costa |
| author_facet | João Leodato Nunes Maciel Gustavo Bilíbio dos Santos Carlos Augusto Pizolotto Marcos Kovaleski Alieze Nascimento da Silva Carolina Cardoso Deuner Ivan Francisco Dressler da Costa |
| author_sort | João Leodato Nunes Maciel |
| collection | DOAJ |
| description | ABSTRACT: The first report of wheat blast in the world was in Brazil, in 1986. Since then, a great effort has been made towards the development of wheat cultivars resistant to this disease, which is caused by the fungus Pyricularia oryzae Triticum (PoT). The objective of this research was to (i) evaluate the resistance of wheat genotypes to blast and (ii) verify the correlation between disease severity on wheat spikes and sporulation rate of PoT on spike rachises. Plants of 40 cultivars grown in pots, at the flowering stage (stage 65 on the Zadoks scale), were inoculated with a suspension of conidia of a PoT isolate representative of the main variant of the fungus reported in Brazil. Severity of blast on the spikes at 5 and 7 days after inoculation (dai) and the rate of sporulation of the fungus on the rachis (conidia per g of rachis) were evaluated. Eighty percent of the cultivars that were classified in the group with the lowest sporulation rate were also classified in the group with the highest resistance at 7 dai. However, the correlation coefficients of the analysis established between the cultivar severity at 5 and 7 dai averages and the PoT sporulation rate averages were not significant (r=0.2464 and r=0.2047, respectively). Results obtained represent the updated characterization to blast of wheat cultivars in Brazil and constitute an important exploratory framework for the evaluation of the reaction of wheat genotypes based on the sporulation rate of PoT on their tissues. |
| first_indexed | 2024-04-11T15:16:59Z |
| format | Article |
| id | doaj.art-62c42ef2842e4ad3b18e79d0dfbaf698 |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-04-11T15:16:59Z |
| publishDate | 2021-11-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-62c42ef2842e4ad3b18e79d0dfbaf6982022-12-22T04:16:27ZengUniversidade Federal de Santa MariaCiência Rural1678-45962021-11-0152710.1590/0103-8478cr20210417Resistance of Brazilian wheat cultivars to blast under controlled conditionJoão Leodato Nunes Macielhttps://orcid.org/0000-0002-1827-1381Gustavo Bilíbio dos Santoshttps://orcid.org/0000-0002-6741-1395Carlos Augusto PizolottoMarcos Kovaleskihttps://orcid.org/0000-0002-4839-0904Alieze Nascimento da SilvaCarolina Cardoso DeunerIvan Francisco Dressler da CostaABSTRACT: The first report of wheat blast in the world was in Brazil, in 1986. Since then, a great effort has been made towards the development of wheat cultivars resistant to this disease, which is caused by the fungus Pyricularia oryzae Triticum (PoT). The objective of this research was to (i) evaluate the resistance of wheat genotypes to blast and (ii) verify the correlation between disease severity on wheat spikes and sporulation rate of PoT on spike rachises. Plants of 40 cultivars grown in pots, at the flowering stage (stage 65 on the Zadoks scale), were inoculated with a suspension of conidia of a PoT isolate representative of the main variant of the fungus reported in Brazil. Severity of blast on the spikes at 5 and 7 days after inoculation (dai) and the rate of sporulation of the fungus on the rachis (conidia per g of rachis) were evaluated. Eighty percent of the cultivars that were classified in the group with the lowest sporulation rate were also classified in the group with the highest resistance at 7 dai. However, the correlation coefficients of the analysis established between the cultivar severity at 5 and 7 dai averages and the PoT sporulation rate averages were not significant (r=0.2464 and r=0.2047, respectively). Results obtained represent the updated characterization to blast of wheat cultivars in Brazil and constitute an important exploratory framework for the evaluation of the reaction of wheat genotypes based on the sporulation rate of PoT on their tissues.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700152&tlng=enPyricularia oryzae Triticumseveritysporulation |
| spellingShingle | João Leodato Nunes Maciel Gustavo Bilíbio dos Santos Carlos Augusto Pizolotto Marcos Kovaleski Alieze Nascimento da Silva Carolina Cardoso Deuner Ivan Francisco Dressler da Costa Resistance of Brazilian wheat cultivars to blast under controlled condition Ciência Rural Pyricularia oryzae Triticum severity sporulation |
| title | Resistance of Brazilian wheat cultivars to blast under controlled condition |
| title_full | Resistance of Brazilian wheat cultivars to blast under controlled condition |
| title_fullStr | Resistance of Brazilian wheat cultivars to blast under controlled condition |
| title_full_unstemmed | Resistance of Brazilian wheat cultivars to blast under controlled condition |
| title_short | Resistance of Brazilian wheat cultivars to blast under controlled condition |
| title_sort | resistance of brazilian wheat cultivars to blast under controlled condition |
| topic | Pyricularia oryzae Triticum severity sporulation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700152&tlng=en |
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