Data/hora: 23/09/2024 22:53:57

Biblioteca(s): 	Embrapa Milho e Sorgo.	
Data corrente: 	12/08/2004	
Data da última atualização: 	14/06/2018	
Autoria: 	MORO, G. L.; LOPES, M. A.; HABBEN, J. E.; HAMAKER, B. R.; LARKINS, B. A.	
Afiliação: 	MAURÍCIO ANTONIO LOPES, EMBRAPA-CNPMS.	
Título: 	Phenotypic effects of opaque-2 modofier genes in normal maize endosperm.	
Ano de publicação: 	1995	
Fonte/Imprenta: 	Cereal Chemistry, St. Paul, v. 72, n. 1, p. 94-99, 1995.	
Idioma: 	Inglês	
Conteúdo: 	The opaque2 modifier genes convert the soft, chalky endosperm, as found in maize opaque2 mutants, to a hard, vitreous phenotype. Modified opaque2 genotypes, also known as Quality Protein Maize (QPM), have increased levels of the essential amino acid Iysine and a normal appearing kernel. The development of vitreous endosperm in QPM is associated with a two-to threefold increase in the l'-zein storage protein. To determine whether an increased concentration of l'-zein can influence hardness and the formation of vitreous endosperm in normal genotypes, we derived 13 modified normal inbreds from a cross of the normalline W64A with Pool 34 QPM. Analysis of protein content, kernel density and hardness revealed variation among the 13 inbreds. The modified normal inbreds show an increased content of l'-zein in the endosperm, similar to that of QPM. But the high levei of l'-zein did not increase hardness and density above a threshold leveI. The modified normal inbreds did not have an increased Iysine content, suggesting modifier genes, per se, do not improve the nutritional quality of maize endosperm.	
Palavras-Chave: 	Opaque 2; Opaque-2; Protein; Quality.	
Thesagro: 	Biologia Molecular; Milho; Proteína; Qualidade; Zea Mays.	
Thesaurus Nal: 	molecular biology.	
Categoria do assunto: 	S Ciências Biológicas	
Registro original: 	Embrapa Milho e Sorgo (CNPMS)	
Exemplares: 	CNPMS - (16573-1) - UPC - AP - DD -  -  -  - DIS