Data/hora: 23/09/2024 05:43:45

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	15/04/2004	
Data da última atualização: 	15/04/2004	
Autoria: 	WOODWARD, B; PUONTI-KAERLAS, J.	
Título: 	Somatic embryogenesis from floral tissue of cassava (Manihot esculenta Crantz).	
Ano de publicação: 	1998	
Fonte/Imprenta: 	Revista Brasileira de Mandioca, Cruz das Almas, v. 17 p.57 nov., 1998. Suplemento.	
Idioma: 	Inglês	
Conteúdo: 	Abstract: Cassava (Manihot esculenta Crantz) is a staple food in many parts of the world, where it is often grown as a carbohyzdrate source by subsistence farmers in developing countries. Traditional breeding of cassava is difficult due to its allopolyploid nature, heterozygosity and its low natural fertillity. In recent years it has become clear that biotechnology could make a significant contribuition to cassava improvement. Although murch research has been done on regeneration and embryogenesis from somatic (leaf) tissue, reports on regeneration and embryogenesis from anther are still limited. Such information would be useful to induce haploidy in cassava. The aim of this study therefore was to examine the embryogenic potential of floral material of the cassava cultivar MCOL 1505. No regeneration was obtained from anther, microspore or floret wall tissue. Macerated immature inflorescences, however, were found to be highly embryogenic, with almost 78% of explants producing somatic embryos. Somatic embryos were also produced from whole male florests and half florets although at much lower rates. Somatics embryos derived from immature inflorescences were regenerated via organogenesis and the plants derived from this process are being assessed in terms of normality and ploidy level. If it can be shown that haploid plants are produced by this method , this would have significant implications in assisting traditional cassava breeding.        	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (20967-1) - ADD - AP - -- - 633.68205 -  -  - DIS