English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/102419
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Cold tolerance evaluation in a diallel among open-pollinated sweet corn cultivars

AutorRevilla Temiño, Pedro ; Hotchkiss, J. R.; Tracy, W. F.
Palabras claveZea mays
Combining ability
Fecha de publicaciónfeb-2003
EditorAmerican Society for Horticultural Science
CitaciónHortScience 38 (1): 88-91 (2003)
ResumenMany sweet corn hybrids germinate poorly and have low seedling vigor in cold soils. Sources of cold tolerance and an understanding of its inheritance would benefit sweet corn production. Our objective was to determine the genetics of cold tolerance among open-pollinated progenitors of modern sweet corn. Six open-pollinated sweet corn cultivars were used as parents of a diallel. The 15 crosses plus reciprocals, parents, and checks were evaluated in cold chambers. Growing conditions were 14 hours with light at 14 °C, and 10 hours without light at 10 °C. Days to emergence, percent emergence, shoot dry weight, and root dry weight were recorded. The experiment was repeated in the greenhouse under warm conditions. Variation for cold tolerance was present among the crosses and cultivars. The variation was primarily due to general combining ability (GCA) effects, with specific combining ability (SCA) effects and reciprocal effects being significant for seedling dry mater. `Howling Mob' had significant favorable GCAs for all cold tolerance traits and resulted in the most cold-tolerant hybrids. `Country Gentleman' and `Stowell's Evergreen' were the slowest emerging parents. Days to emergence under cold conditions was not correlated to days to emergence under warm conditions. The correlations between root weight (cold) and root weight (warm) and shoot weight (cold) and shoot weight (warm) were significant, positive, and relatively large. In this material it appears that seedling vigor under warm conditions could be used to predict seedling size under cold conditions.
Versión del editorhttp://hortsci.ashspublications.org/content/38/1/88
Aparece en las colecciones: (MBG) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.