IBIS-Flora

Angiosperm Flora of India

Combining abilities in maize for the length of the internode basal ring, the entry point of the Mediterranean corn borer larvae

Publication Type:Journal Article
Year of Publication:2011
Authors:Barros, J, Malvar, RA, Butrón, A, Santiago, R
Journal:Plant Breeding
Volume:130
Issue:2
Date Published:2011
ISBN Number:1439-0523
Keywords:diallel cross combining ability, intercalary meristem, Sesamia nonagrioides, structural borer resistance, Zea mays
Abstract:

With 2 tablesAbstract Length of the internode basal ring (LIBR) in maize is a morphological character that has been associated with resistance to Mediterranean corn borer (MCB), Sesamia nonagrioides Lef. The present study is the first research to evaluate the usefulness of this trait in breeding programmes. Six maize hybrids, from a complete diallel set of four inbred lines (two resistant and two susceptible to MCB), were evaluated under early and late sowing conditions at three locations in northwestern Spain. General and specific combining ability (GCA and SCA, respectively) for LIBR were estimated, and LIBR correlations with grain yield and other important agronomic traits were evaluated. Hybrid by environment interactions were not significant for LIBR and the sums of squares partitioning indicated a greater GCA effect (95%), suggesting that this trait is stable and shows important additive effects for this set of hybrids. Correlation coefficients not only indicate that selection for increasing LIBR could enhance grain yield and other related plant traits (height and silking) but also an increase in the MCB susceptibility. Based on the limited number genotypes evaluated, LIBR could be modified by selection; however, if LIBR is used as an indirect selection criterion to improve MCB resistance, then some negative effects on yield may be expected.

URL:http://dx.doi.org/10.1111/j.1439-0523.2010.01789.x
Short Title:Plant Breeding
Taxonomic name: 
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