Rind puncture resistance in maize: inheritance and relationship with resistance to pink stem borer attack

Abstract

The main pest of maize in north-western Spain is the pink stem borer, Sesamia nonagrioides, and stem lodging is one of the consequences of attack. Since rind puncture resistance is related to stem lodging resistance, the objectives of this work were to estimate the genetic effects involved in the inheritance of rind puncture resistance and to determine the phenotypic correlation coefficients between rind puncture resistance and pink stem borer damage. Six generations from the crosses ‘CM109’בEP31’ and ‘CM109’בEP42’ and a 10-inbred line diallel were evaluated in Pontevedra, Spain, in 1995 and 1996. The inheritance of rind puncture resistance had two significant components, one additive and one dominant. Non-allelic and genotype × environment interactions were not significant. Improvement for internode rind puncture resistance to increase stem strength and stalk lodging resistance could have some positive influence on resistance to pink stem borer. However, its use as an estimator of pink stem borer resistance cannot be generalized and so must be restricted to programmes that involve materials exhibiting physical resistance to pink stem borer attack.Research was supported by the Committee for Science and Technology of Spain (project AGF95-0891) and by the Department of Education of the Autonomous Government of Galicia (project XUGA 40301B95). A. Butrón acknowledges a fellowship from the Spanish Council for Scientific Research of Spain. The authors thank E. Muiños for her invaluable help in rearing the pink stem borers.MCYTXunta de GaliciaCSICPeer reviewe

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oaioai:digital.csic.es:10...Last time updated on 5/25/2016

This paper was published in Digital.CSIC.

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