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Bragantia

Print version ISSN 0006-8705On-line version ISSN 1678-4499

Bragantia vol.30 no.2 Campinas May 1971

http://dx.doi.org/10.1590/S0006-87051971000200001 

Novas variedades de pimentão resistentes ao mosaico causado por virus Y1

 

New lines of sweet pepper resistant to strains of potato Y virus

 

 

Hiroshi Nagai2

Engenheiro-agrônomo, Seção de Virologia Fitotécnica, Instituto Agronômico

 

 


SINOPSE

Novas variedades de pimentão denominadas "Agronômico 9" e "Agronômico 10" foram obtidas de cruzamentos múltiplos, em que tomaram parte as variedades de pimentão Casca Dura (Casca Grossa), Mogi das Cruzes, Porto Rico Wonder, Moura, Ikeda, Yolo Wonder e Modestão, além de uma pimenteira P 11 (P.I. 264281). Cada uma dessas variedades contribuiu com respectivos genes de resistência às estirpes Yn, Yw, Yf, Yat do complexo PVY e mais hipersensibilidade ao TMV.
"Agronômico 9" produz frutos quadrados (tipo California Wonder) e "Agronômico 10" apresenta frutos cônico-alongados (tipo Casca Dura).


SUMMARY

Breeding work carried out by the writer in the past led to the development of two new sweet pepper varieties, Agronômico 7 (California wonder type) and Agronômico 8 (conical fruit), incorporating the high level of resistance to strains of potato Y virus from P 11 (P.I. 264281). The occurrence of a potato Y virus strain (Atibaia — Yat) that infected these new pepper types and the fact that their fruit was considered as below the desirable market size led author to continue their improvement.
Further breeding work either the two varieties was carried out, as follows: (1) Agronômico 7 was crossed with a California pepper type that has been called Modestão; selection made in advanced generations of this cross resulted in a sweet pepper type with the blocky type of fruit that combines other favorable characteristics of both parents, and has been designated as Agronômico 9; (2) A selection of Agronômico 8, resistant to the Yat strain, was crossed, with Ikeda, a variety that is tolerant to the virus and has larger fruit than the other parent. Selection in advanced generations of this cross led to Agronômico 10, that has conical fruit of a size comparable to that of Ikeda, and the very high level of resistance to potato Y virus of P 11.
Agronômico 9 and 10 are being tested on a large scale at present and scheduled to be released in the future.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

LITERATURA CITADA

1. BERNARDI, J. B. & IGUE, T. Comportamento de novas variedades de pimentão na região de Campinas. Bragantia 28:227-232, 1969.         [ Links ]

2. COOK, A. A. Genetics of response in pepper to three strains of potato virus Y. Phytopathology 53:720-722, 1963.         [ Links ]

3. ________& ANDERSON, C. W. Inheritance of resistance to potato virus Y derived from two strains of Capsicum annuum. Phytopathology 50:73-75, 1960.         [ Links ]

4. COSTA, A. S. & ALVES, S. Mosaico do pimentão. Bragantia 10:93-94, 1950.         [ Links ]

5. ________; CARVALHO, A. M. B. & KITAJIMA, E. W. Risca do tomateiro em São Paulo, causada por estirpe do vírus Y. Bragantia 19:1111-1128, 1960.         [ Links ]

6. ________; NAGAI, H. & KITAJIMA E. W. Estirpe do vírus Y de valor experimental. Bragantia 28:233-239, 1969.         [ Links ] .

7. KITAJIMA, E. W.; CARVALHO, A. M. B. & COSTA, A. S. Microscopia electrônica de estirpes do virus Y da batatinha que ocorrem em São Paulo. Bragantia 21:755-763, 1962.         [ Links ]

8. NAGAI, H. Obtenção de variedades de pimentão resistentes ao mosaico. Bragantia 27:311-354, 1968.         [ Links ]

9. ________& SMITH, P. G. Reaction of pepper varieties to naturally occurring viruses in California. PI. Dis. Rept. 52:928-930, 1968.         [ Links ]

10. ________; COSTA, A. S.; MATUO, T.; OI, AKIRA & KISHIMOTO, A. Resistência do pimentão Agronômico 8 rompida por estirpe do vírus Y de Atibaia. Rev. Soc. bras. Fitop. 3:52-53, 1969.         [ Links ]

11. PAHLEN, A. The inheritance of a new source of resistance to the potato virus Y in pepper (Capsicum annuum L.). Bol. Genet. Inst. Fitotec. Castelar 3:23-28, 1967.         [ Links ]

12. RIOLLANO, A.; ADSUAR, J. & RODRIGUES, A. Breeding peppers resistant to a Puerto Rico type of mosaic. Proc. Am. Soc. hort. Sci. 51:415-416, 1948.         [ Links ]

13. ROQUE, A. & ADSUAR, J. Studies on the mosaic of peppers (Capsicum frutescens) in Puerto Rico. J. Agric. Univ. P. Rico 25:40-50, 1941.         [ Links ]

14. ZABALA, S. & DELLE COSTA, A. C. Identificacion de "polvillo del tabaco" con uno de los mosaico del pimiento. Rev. argent. Agron. 13:167-180, 1946.         [ Links ]

 

 

Recebido para publicação em 18 de fevereiro de 1971.

 

 

1 Trabalho apresentado na VIII Reunião Latino-Americana de Fitotecnia, Bogotá-Colômbia, Novembro de 1970.
2 Com bolsa de suplementação do Conselho Nacional de Pesquisas.

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