Inheritance of resistance to Meloidogyne enterolobii in Psidium guajava x P. guineense hybrid.

COSTA, S. R. da; SANTOS, C. A. F.; CASTRO, J. M. da C. e

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Campo DC	Valor	Idioma
dc.contributor.author	COSTA, S. R. da	pt_BR
dc.contributor.author	SANTOS, C. A. F.	pt_BR
dc.contributor.author	CASTRO, J. M. da C. e	pt_BR
dc.date.accessioned	2016-11-17T11:11:11Z	pt_BR
dc.date.available	2016-11-17T11:11:11Z	pt_BR
dc.date.created	2016-11-17	pt_BR
dc.date.issued	2016	pt_BR
dc.identifier.citation	European Journal of Plant Pathology, v. 145, n. 4, 2016.	pt_BR
dc.identifier.uri	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1056536	pt_BR
dc.description	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.	pt_BR
dc.language.iso	eng	eng
dc.rights	openAccess	eng
dc.subject	Meloidogyne enterolobii	pt_BR
dc.subject	Melhoramento genético	pt_BR
dc.subject	Guava	pt_BR
dc.subject	Nematode	pt_BR
dc.title	Inheritance of resistance to Meloidogyne enterolobii in Psidium guajava x P. guineense hybrid.	pt_BR
dc.type	Artigo de periódico	pt_BR
dc.date.updated	2017-02-15T11:11:11Z	pt_BR
dc.subject.thesagro	Goiaba	pt_BR
dc.subject.thesagro	Nematoíde	pt_BR
dc.subject.nalthesaurus	Heritability	pt_BR
riaa.ainfo.id	1056536	pt_BR
riaa.ainfo.lastupdate	2017-02-15	pt_BR
dc.identifier.doi	10.1007/s10658-016-1098-0	pt_BR
dc.contributor.institution	SONIANE RODRIGUES DA COSTA, UEFS; CARLOS ANTONIO FERNANDES SANTOS, CPATSA; JOSE MAURO DA CUNHA E CASTRO, CPATSA.	pt_BR
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