Data/hora: 03/06/2024 09:20:26

Provedor de dados: | 63
País: | Brazil
Título: | Field comparison between selection methods at the maize seedling stage in relation to aluminum tolerance
Autores: | Giaveno,Carlos Daniel; Miranda Filho,José Branco de.
Data: | 2002-06-01
Ano: | 2002
Palavras-chave: | Zea mays; Acid soils; Seedling; Divergent selection.
Resumo: | Selection and breeding for aluminum tolerance is a useful approach to increase maize (Zea mays L.) grain yield in acid soils. The objective of this work was the comparison between two screening approaches for the development of Al tolerant maize populations. One cycle of divergent selection for aluminum tolerance, using both nutrient solution and pots with acid soil, were completed in the maize population SIKALQ. The four sub-populations selected through both selection procedures were compared with the original population and checks in field trials repeated over locations. Eight environments stratified into four groups varying from non acid to high aluminum saturation were used. Three variables were analyzed for comparisons of methodologies: grain yield, plant height and days to male flowering. The populations performed similarly in the high productivity locations and the differences between tolerant and sensitive ones were more evident for increasing levels of toxic aluminum. In spite of little differences, selection in pots with acid soil was more efficient than nutrient solution in changing the genetic structure of the population toward more tolerant and sensitive levels.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200029
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162002000200029
Formato: | text/html
Fonte: | Scientia Agricola  v.59 n.2 2002
Fonte: | info:eu-repo/semantics/openAccess