Data/hora: 24/06/2024 15:04:17

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	18/08/2005	
Data da última atualização: 	06/10/2005	
Autoria: 	POLETINE, J. P.; ZANOTTO, M. D.; AMARAL, J. G. C. do.	
Título: 	Effect of mass selection on the mean and genetic variance of maize cultivar AL 25.	
Ano de publicação: 	2004	
Fonte/Imprenta: 	Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 4, n. 4, p. 484-489, Dec. 2004.	
Idioma: 	Inglês	
Conteúdo: 	This study analysed the effects of mass selection on the mean and variance of maize cultivar AL 25, using 100 half-sib progenies of an initial cycle and 100 progenies of the 11th cycle. Grain yield and ear height were evaluated in 1999-2000 in Sao Paulo, Brazil. Individual and joint variance analyses considering the two years of experimental duration compared the mean and variance components of both cycles. A slight reduction in additive genetic variance was observed as the selection proceeded for both analysed traits. The increase in the means of grain yield and ear height with the selection cycles was also little expressive. The mass selection cycles did not promote significant alterations in this cultivar's mean and variance.
	
Palavras-Chave: 	Crop breeding; Mass selection; Mean; Média; Melhoramento genético; Variância.	
Thesagro: 	Milho; Seleção Massal; Zea Mays.	
Thesaurus Nal: 	variance.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (22877-1) - ADD - AP - -- - 631.05 - C - 2004.00351 - DIS