Data/hora: 13/06/2024 17:16:10

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	18/03/2009	
Data da última atualização: 	25/02/2015	
Autoria: 	SZANKOWSKI, I.; WAISMANN, S.; DEGENHARDT, J.; PATOCCHI, A.; PARIS, R.; SILFVERBERG-DILWORTH, E.; BROGGIANI, G.; GESSLER, C.	
Afiliação: 	Iris Szankowski, Universidade de Hannover; Sascha Waidmann, Universidade de Hannover; Juliana Degenhardt, Embrapa Florestas; Andrea Patocchi, Agroscope Changins-Wadennswill; Roberta Paris, Universidade de Bologna; Eve Silfverberg-Dilworth, Institute of Integrative Biology/ETH Zurich; Giovanni Broggini, Institute of Integrative Biology/ETH Zurich; Cesare Gessler, Institute of Integrative Biology/ETH Zurich.	
Título: 	Highly scab-resistant transgenic aplle lines achieved by introgression of HcrVf2 controlled by different native promoter lengths.	
Ano de publicação: 	2009	
Fonte/Imprenta: 	Tree Genetics & Genomes, v. 5, p. 349-358, 2009.	
DOI: 	10.1007/s11295-008-0191-8	
Idioma: 	Inglês	
Conteúdo: 	Apple scab, caused by the ascomycete Venturia inaequalis, is the most damaging fungal disease of commercial apple orchards. Functional scab resistance genes are present in some wild Malus species. The HcrVf2 gene, derived from the Vf-region of the wild apple Malus floribunda 821 and encoding a receptor-like protein, has proved to confer scab resistance in a transgenic susceptible cultivar. In order to minimize nonplant DNA in genetically modified apple and to go a step toward the development of cisgenic apples, we have studied the capability of the HcrVf2 gene to confer apple scab resistance when it is controlled by its own promoter. Three promoter deletion constructs containing 115, 288, and 779 bp of the 5? untranslated region and the HcrVf2 gene were used to transform the scab susceptible apple cvs. ‘Gala’ and ‘Elstar.’ The influence of the promoter length on both the HcrVf2 expression level and the response to V. inaequalis was analyzed in different transgenic lines. Promoter length was found to influence both the constitutive transcription levels of HcrVf2 in transgenic lines and the resistance level. Highly scab resistant ‘Elstar’ and ‘Gala’ plants were obtained, proving that the HcrVf2 gene controlled by its native promoter is effective in conferring resistance to V. inaequalis similarly as Vf introgressed in apple cvs. through classical breeding.	
Palavras-Chave: 	Malus venturia.	
Thesagro: 	Maçã; Resistência.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (44907-1) - UPC - AP - DD -  -  -  - DIS