Resumo

SALERNO, Juan Carlos et al. Genetics and statistical association between lethal alleles and quantitative yield factors in maize (Zea mays l.). BAG, J. basic appl. genet. [online]. 2007, vol.18, n.1, pp.07-13. ISSN 1852-6233.

The objective of this work is to study the genetic process related to the hybrid vigour (heterosis) and the identification of quantitative trait loci (QTL) in maize. A biometric model was built using the mathematical formalism relating to the discrete absorbent Markov chain in canonical form, in order to analyse the evolution of chromosome segments, with recessive lethal genes linked with grain yield factors through generations. The grain yield obtained from an inbred maize line regulated by a balanced lethal system, and other lines without this system as control, were evaluated during five inbreeding generations. The use of the Markov chain theory for the study of evolution during these generations was a different approach of the classical mathematical ones.

Palavras-chave : Maize; Lethal alleles; Heterosis; Markov Chains; QTL.

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