| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Hortaliças. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Hortaliças. |
|
Data corrente: |
28/07/2025 |
|
Data da última atualização: |
28/07/2025 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
CUNHA, D. F.; PINTO, T. J. B.; FONSECA, M. E. N.; SILVA, G. O. da; RAFAEL, F. S.; SANTOS, L. A.; CARES, J. E.; PINHEIRO, J. B.; BOITEUX, L. S. |
|
Afiliação: |
DWILLIAN FIRMIANO CUNHA, UNIVERSIDADE DE BRASÍLIA; THÁVIO JÚNIOR BARBOSA PINTO, UNIVERSIDADE DE BRASÍLIA; MARIA ESTHER DE NORONHA FONSECA BOITEUX, CNPH; GIOVANI OLEGARIO DA SILVA, CNPH; FELIPE SANTOS RAFAEL, ICESP; LEANDRO ALVES SANTOS, UNIVERSIDADE DE BRASÍLIA; JUVENIL ENRIQUE CARES, UNIVERSIDADE DE BRASÍLIA; JADIR BORGES PINHEIRO, CNPH; LEONARDO SILVA BOITEUX, CNPH. |
|
Título: |
Assessing the residual effects of the tomato Mi‐1.2 gene against a Meloidogyne enterolobii (guava race) population via comparative assays with contrasting near‐isogenic lines. |
|
Ano de publicação: |
2025 |
|
Fonte/Imprenta: |
Tropical Plant Pathology, v. 50, n. 55, 2025. |
|
Páginas: |
10 p. |
|
Idioma: |
Português |
|
Conteúdo: |
The interaction of the tomato Mi-1.2 gene with the members of the genus Meloidogyne is a special case where a single host factor confers resistance to an array of up to 13 species, but not against M. enterolobii populations. There are numerous reports of “defeated” resistance genes in distinct pathosystems, which are not effective against distinct pathogen variants (at biotype, race, or species level as in the case of the Mi-1.2 gene). However, a subgroup of these apparently non-effective genes can still display residual or “ghost” effects, resulting in lower damage levels caused by a virulent pathogen. Thus far, residual effects of the Mi-1.2 gene to M. enterolobii have not been properly investigated. Herein, two comparative assays using contrasting near-isogenic lines (NILs) for presence/absence of the Mi-1.2 locus were carried out using a guava race population of M. enterolobii. Seedlings of two pairs of contrasting NILs ‘Nemadoro’ (homozygous dominant; Mi-1.2/Mi-1.2) / ‘Rio Grande’ (homozygous recessive, mi-1.2/mi-1.2) and ‘Del Rey’ (Mi-1.2/Mi-1.2) / ‘Calipso’ (mi-1.2/mi-1.2) were inoculated with 2,000 M. enterolobii eggs. The homozygous dominant (Mi-1.2/Mi-1.2) NILs displayed values for the quantitative parameter number of eggs+J2s per gram of root tissue similar or even superior to their corresponding recessive (mi-1.2/mi-1.2) NILs. A slight positive impact of the resistance gene in the reproduction factor (RF) value was observed only for one pair of contrasting NILs (‘Del Rey’ / ‘Calipso’), which was restricted to one bioassay. Hence, the employment of NILs in our bioassays allowed us to hypothesize that the Mi-1.2 gene, although extremely effective against populations of at least 13 Meloidogyne species, does not confer significant residual effects against M. enterolobii (guava race). MenosThe interaction of the tomato Mi-1.2 gene with the members of the genus Meloidogyne is a special case where a single host factor confers resistance to an array of up to 13 species, but not against M. enterolobii populations. There are numerous reports of “defeated” resistance genes in distinct pathosystems, which are not effective against distinct pathogen variants (at biotype, race, or species level as in the case of the Mi-1.2 gene). However, a subgroup of these apparently non-effective genes can still display residual or “ghost” effects, resulting in lower damage levels caused by a virulent pathogen. Thus far, residual effects of the Mi-1.2 gene to M. enterolobii have not been properly investigated. Herein, two comparative assays using contrasting near-isogenic lines (NILs) for presence/absence of the Mi-1.2 locus were carried out using a guava race population of M. enterolobii. Seedlings of two pairs of contrasting NILs ‘Nemadoro’ (homozygous dominant; Mi-1.2/Mi-1.2) / ‘Rio Grande’ (homozygous recessive, mi-1.2/mi-1.2) and ‘Del Rey’ (Mi-1.2/Mi-1.2) / ‘Calipso’ (mi-1.2/mi-1.2) were inoculated with 2,000 M. enterolobii eggs. The homozygous dominant (Mi-1.2/Mi-1.2) NILs displayed values for the quantitative parameter number of eggs+J2s per gram of root tissue similar or even superior to their corresponding recessive (mi-1.2/mi-1.2) NILs. A slight positive impact of the resistance gene in the reproduction factor (RF) value was observed only for one pair of contrasting NILs (... Mostrar Tudo |
|
Thesagro: |
Gene; Meloidogyne spp; Resistência; Tomate. |
|
Thesaurus Nal: |
Genetic resistance; Root-knot nematodes; Solanum lycopersicum. |
|
Categoria do assunto: |
G Melhoramento Genético |
|
Marc: |
LEADER 02809naa a2200313 a 4500
001 2177528
005 2025-07-28
008 2025 bl uuuu u00u1 u #d
100 1 $aCUNHA, D. F.
245 $aAssessing the residual effects of the tomato Mi‐1.2 gene against a Meloidogyne enterolobii (guava race) population via comparative assays with contrasting near‐isogenic lines.$h[electronic resource]
260 $c2025
300 $a10 p.
520 $aThe interaction of the tomato Mi-1.2 gene with the members of the genus Meloidogyne is a special case where a single host factor confers resistance to an array of up to 13 species, but not against M. enterolobii populations. There are numerous reports of “defeated” resistance genes in distinct pathosystems, which are not effective against distinct pathogen variants (at biotype, race, or species level as in the case of the Mi-1.2 gene). However, a subgroup of these apparently non-effective genes can still display residual or “ghost” effects, resulting in lower damage levels caused by a virulent pathogen. Thus far, residual effects of the Mi-1.2 gene to M. enterolobii have not been properly investigated. Herein, two comparative assays using contrasting near-isogenic lines (NILs) for presence/absence of the Mi-1.2 locus were carried out using a guava race population of M. enterolobii. Seedlings of two pairs of contrasting NILs ‘Nemadoro’ (homozygous dominant; Mi-1.2/Mi-1.2) / ‘Rio Grande’ (homozygous recessive, mi-1.2/mi-1.2) and ‘Del Rey’ (Mi-1.2/Mi-1.2) / ‘Calipso’ (mi-1.2/mi-1.2) were inoculated with 2,000 M. enterolobii eggs. The homozygous dominant (Mi-1.2/Mi-1.2) NILs displayed values for the quantitative parameter number of eggs+J2s per gram of root tissue similar or even superior to their corresponding recessive (mi-1.2/mi-1.2) NILs. A slight positive impact of the resistance gene in the reproduction factor (RF) value was observed only for one pair of contrasting NILs (‘Del Rey’ / ‘Calipso’), which was restricted to one bioassay. Hence, the employment of NILs in our bioassays allowed us to hypothesize that the Mi-1.2 gene, although extremely effective against populations of at least 13 Meloidogyne species, does not confer significant residual effects against M. enterolobii (guava race).
650 $aGenetic resistance
650 $aRoot-knot nematodes
650 $aSolanum lycopersicum
650 $aGene
650 $aMeloidogyne spp
650 $aResistência
650 $aTomate
700 1 $aPINTO, T. J. B.
700 1 $aFONSECA, M. E. N.
700 1 $aSILVA, G. O. da
700 1 $aRAFAEL, F. S.
700 1 $aSANTOS, L. A.
700 1 $aCARES, J. E.
700 1 $aPINHEIRO, J. B.
700 1 $aBOITEUX, L. S.
773 $tTropical Plant Pathology$gv. 50, n. 55, 2025.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Hortaliças (CNPH) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 328 | |
| 2. |  | CRUZ, G. M. D. Produção de carne bovina utilizando confinamento. In: ENCONTRO DE MÉDICOS VETERINÁRIOS DOS VALES MUCURI, JEQUITINHONHA E RIO DOCE 22.; SIMPÓSIO DE ATUALIZAÇÃO TÉCNICA DO NORDESTE MINEIRO, 2001, Teófilo Otoni, MG. Teófilo Otoni: SRMVM, 2001. p.33-41.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
|    |
| 5. | | CRUZ, G. M. D. Avaliação qualitativa e quantitativa da carcaça de bovino. In: ESTEVES, S.N.; BARBOSA, P. F.; BARBOSA, R.T. (Ed.). Intensificação da bovinocultura de corte: estratégias de alimentação e terminação. São Carlos, SP: EMBRAPA-CPPSE, 1997. p.58-75. p.58-75. (EMBRAPA-CPPSE. Documentos, 27).| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| 15. | | CRUZ, G. M. D. Uso de silagem para bovinos de corte. In: CURSO DE ATUALIZAÇÃO EM PRODUÇÃO E USO DE SILAGEM PARA BOVINOS, 1997, São Carlos, SP. Palestras... São Carlos: Embrapa Pecuária Sudeste, 1997. p.61-67.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| 16. | | CRUZ, G. M. D. Uso de silagem para bovinos de corte. In: CRUZ, G. M. da; MONTEIRO NOVO, A. L.; PEDROSO, A. de F. Curso: produção e manejo de silagem. Resumos... São Carlos, SP: EMBRAPA-CPPSE, 1998. p.62-69.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| Registros recuperados : 328 | |
|
| Expressão de busca inválida. Verifique!!! |
|
|
