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| Registros recuperados : 130 | |
| Registros recuperados : 130 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
17/11/2016 |
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Data da última atualização: |
15/02/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
COSTA, S. R. da; SANTOS, C. A. F.; CASTRO, J. M. da C. e. |
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Afiliação: |
SONIANE RODRIGUES DA COSTA, UEFS; CARLOS ANTONIO FERNANDES SANTOS, CPATSA; JOSE MAURO DA CUNHA E CASTRO, CPATSA. |
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Título: |
Inheritance of resistance to Meloidogyne enterolobii in Psidium guajava x P. guineense hybrid. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
European Journal of Plant Pathology, v. 145, n. 4, 2016. |
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DOI: |
10.1007/s10658-016-1098-0 |
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Idioma: |
Inglês |
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Conteúdo: |
Inheritance of the resistance to nematodes has been studied on many different crops, however to our knowledge, no data are available for guava species. The basic genetic resistance parameters to Meloidogyne enterolobii are estimated in the current research in order to guide the development of genotypes resistant to the pathogen. The parental plants, F1 and F2 from a Psidium guajava x P. guineense cross were assessed for the presence or absence of galls and for the number of eggs and juveniles in the root system at the 120th and 240th days after inoculation with 10,000 eggs and juve- niles of the nematode. At the age of nine years, the P. guineense plant remained without nematode attack symptoms, whereas the maternal plant was destroyed by the pathogen. The F1 generation showed 270 plants with reproduction factor (RF) <0.322, and there were tiny galls in only 16 plants. The segregation for the presence or absence of galls in the root system in generation F2 was 9:7, wherein the χ2 values were 0.78 and 2.66, respectively, at the 120th and 240th days after inoculation, whereas the segregation for RF was 15:1, wherein the χ2 values were 2.76 and 1.18, respectively, at the 120th and 240th days. These results indicate epistatic interaction between two genes: in RF < 1 only one allele sets the resistance to the pathogen. The broad sense heritability of RF, estimated to the two assessments was 0.97, and it also indicates a simple inheritance of resistance to M. enterolobii. |
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Palavras-Chave: |
Guava; Melhoramento genético; Meloidogyne enterolobii; Nematode. |
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Thesagro: |
Goiaba; Nematoíde. |
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Thesaurus NAL: |
Heritability. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/150141/1/Carlos-Antonio-2016.pdf
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Marc: |
LEADER 02226naa a2200241 a 4500
001 2056536
005 2017-02-15
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s10658-016-1098-0$2DOI
100 1 $aCOSTA, S. R. da
245 $aInheritance of resistance to Meloidogyne enterolobii in Psidium guajava x P. guineense hybrid.$h[electronic resource]
260 $c2016
520 $aInheritance of the resistance to nematodes has been studied on many different crops, however to our knowledge, no data are available for guava species. The basic genetic resistance parameters to Meloidogyne enterolobii are estimated in the current research in order to guide the development of genotypes resistant to the pathogen. The parental plants, F1 and F2 from a Psidium guajava x P. guineense cross were assessed for the presence or absence of galls and for the number of eggs and juveniles in the root system at the 120th and 240th days after inoculation with 10,000 eggs and juve- niles of the nematode. At the age of nine years, the P. guineense plant remained without nematode attack symptoms, whereas the maternal plant was destroyed by the pathogen. The F1 generation showed 270 plants with reproduction factor (RF) <0.322, and there were tiny galls in only 16 plants. The segregation for the presence or absence of galls in the root system in generation F2 was 9:7, wherein the χ2 values were 0.78 and 2.66, respectively, at the 120th and 240th days after inoculation, whereas the segregation for RF was 15:1, wherein the χ2 values were 2.76 and 1.18, respectively, at the 120th and 240th days. These results indicate epistatic interaction between two genes: in RF < 1 only one allele sets the resistance to the pathogen. The broad sense heritability of RF, estimated to the two assessments was 0.97, and it also indicates a simple inheritance of resistance to M. enterolobii.
650 $aHeritability
650 $aGoiaba
650 $aNematoíde
653 $aGuava
653 $aMelhoramento genético
653 $aMeloidogyne enterolobii
653 $aNematode
700 1 $aSANTOS, C. A. F.
700 1 $aCASTRO, J. M. da C. e
773 $tEuropean Journal of Plant Pathology$gv. 145, n. 4, 2016.
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Embrapa Semiárido (CPATSA) |
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