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Título

Adaptation of super-sweet maize to cold conditions: mutant x genotype interaction

AutorOrdás López, Bernardo ; Rodríguez Graña, Víctor Manuel ; Romay Álvarez, María Cinta ; Malvar Pintos, Rosa Ana ; Ordás Pérez, Amando ; Revilla Temiño, Pedro
Palabras claveSweetcorn
Zea mays
Cold conditions
Adaptation
Mutant x genotype interaction
Fecha de publicación19-abr-2010
EditorCambridge University Press
CitaciónJournal of Agricultural Science 148 (4): 401–405 (2010)
ResumenSuper-sweet maize (shrunken2, sh2) has a longer post-harvest life than standard sweetcorn (sugary1, su1), but is less well-adapted to cold conditions. The objective of the present work was to determine if the replacement of su1 by sh2 alters the combining abilities of sweetcorn inbreds for adaptation to early planting under cold conditions. Two diallel sets of su1 and sh2 near-isogenic inbred lines were evaluated in a cold chamber and by early field planting. For most of the traits related to adaptation, except silking date, there were significant mutantrgenotype interactions and the estimates of general combining ability (GCA) of each version of the same inbred were different, probably due to epistasis. Therefore, to widen the genetic base of the super-sweet germplasm for adaptation, conversion of the earliest su1 inbreds to sh2, ignoring other characteristics such as emergence or early vigour in early planting or cold tests, is proposed.
Versión del editorhttp://dx.doi.org/10.1017/S0021859610000249
URIhttp://hdl.handle.net/10261/35063
DOI10.1017/S0021859610000249
ISSN0021-8596
E-ISSN1469-5146
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