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Title

Yield evaluation of maize cultivars across environments with different levels of pink stem borer infestation

AuthorsButrón Gómez, Ana María ; Velasco Pazos, Pablo ; Ordás Pérez, Amando ; Malvar Pintos, Rosa Ana
Issue Date2004
PublisherCrop Science Society of America
CitationCrop Science 44 (3): 741-747 (2004)
AbstractYield under infestation by the pink stem borer [Sesamia nonagrioides (Lefebvre)] has been proposed as the best estimator of maize (Zea mays L.) performance under pink stem borer attack. Yield is a complex trait that greatly interacts with the environment. Several methods could be used to study the genotype × environment (GE) interaction. The objective of this work was to study the GE interaction for yield of 49 maize hybrids in five different environments by the Site Regression (SREG) and factorial regression methods. Locations presented different levels of natural infestation by the pink stem borer. The biplot obtained by applying the SREG method allowed visual cultivar evaluation. The factorial regression method incorporated genotypic and environmental covariates that enhanced biological interpretation of GE interaction. Hybrid A637 × EP42 would be recommended in northwestern Spain under medium and high natural infestation by the pink stem borer because it showed high and stable yielding ability. Genotypic and environmental covariates explained approximately 75% of the GE interaction variation, but other genotypic covariates could be introduced in the model to reduce GE residual variation to a nonsignificant level. In general, GE effects for grain yield were mainly due to earliness, vigor effects, and environmental yield limiting factors such as the mean of minimum temperature and percentage of air humidity.
Publisher version (URL)http://dx.doi.org/10.2135/cropsci2004.7410
URIhttp://hdl.handle.net/10261/102392
DOIhttp://dx.doi.org/10.2135/cropsci2004.7410
ISSN0011-183X
E-ISSN1435-0653
Appears in Collections:(MBG) Artículos
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