Tentativa para induzir mutação na cor do feloderma das raízes de mandioca pela irradiação de sementes

Attempt to induce phelloderm color mutation of cassava roots by seed irradiation

NOTAS

Tentativa para induzir mutação na cor do feloderma das raízes de mandioca pela irradiação de sementes

Attempt to induce phelloderm color mutation of cassava roots by seed irradiation

Araken S. Pereira^I; Akihiko Ando^II; Edgard S. NormanhaIII, ^*; Jairo R. Silva^IV; José Osmar LorenziV, ^**; Domingos Antonio Monteiro^V

^ISeção de Raízes e Tubérculos, Instituto Agronômico, IAC

^IIDepartamento de Genética, E.S.A. "Luiz de Queiroz", USP, IAC

^IIIEx-Chefe da Seção de Raízes e Tubérculos, IAC

^IVEx-Pesquisador da Seção de Raízes e Tubérculos, IAC

^VSeção de Raízes e Tubérculos, Instituto Agronômico, IAC

SUMMARY

Selfed cassava seeds of the cultivars IAC Mantiqueira that has a purple phelloderm were treated with gama radiation from a cobalt 60 radiation source at the Centro de Energia Nuclear, Piracicaba, Brasil.

Germination was initially relatively low, but slightly better for the irradiated seeds when compared with the control. The untreated control seeds and the samples irradiated with 20 KR and 30 KR (roentgen units) gave origin respectively to 8%, 13% and 21,6% of seedlings with white phelloderm roots.

The cassava seedlings with a white phelloderm that resulted from the untreated seeds are considered as genetic recombinants of a selfed heterozygous parent. The excess in the number of seedlings with white phelloderm among the population that resulted from the treated seeds, suggest that it was due to the mutagenic effect of the radiation.

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

Recebida para publicação a 10 de maio de 1979.

*

Contratado através do Convênio EMBRAPA/STI/FUNAT.

**

Com bolsa de suplementação do CNPq.

Datas de Publicação

• Publicação nesta coleção
  21 Dez 2007
• Data do Fascículo
  1980