1. Salerno, J.C. 2
  2. Kandús, M.V. 2
  3. Prada, A. 1
  4. Almorza, D. 3
  1. 1 Facultad de Medicina, Universidad de Cádiz, España
  2. 2 INTA, Argentina | Universidad de Morón (UM), Argentina | Universidad del Salvador (USAL), Argentina
  3. 3 Facultad de Ciencias del Trabajo, Universidad de Cádiz, España
Journal of Basic and Applied Genetics

ISSN: 1852-6233 1666-0390

Year of publication: 2023

Volume: 34

Issue: 1

Pages: 11-29

Type: Article

DOI: 10.35407/BAG.2023.34.01.03 GOOGLE SCHOLAR lock_openOpen access editor

More publications in: Journal of Basic and Applied Genetics


In order to increase the efficiency of maize hybrid seed production it is necessary to achieve a high grain yield to reduce production costs. This goal requires an expansion of the basic knowledge of the inheritance of characters in order to develop new breeding techniques to improve experimental materials with hard endosperm (flint). The balanced lethal system allows to study the relative contribution of different chromosome segments to hybrid vigour due to the heterozygosity of certain chromosome segments while the rest of the genome becomes homocygotic through continuous selfing. In this way, these segments can be transferred to inbred lines in order to increase grain yield or tassel size (to increase pollen production). The goal of this study was to transfer a heterotic segment by using a balanced lethal system regulated line (BLS14), through crosses and backcrosses, to S5 flint lines derived from two commercial hybrids, ACA 2000 and Cóndor with closed pedigree, with the objective of increase grain yield or tassel size for pollen production. The analysis of variance (ANOVA) and principal components analysis (PCA) showed a significant improvement in grain yield and tassel size in the S5 flint lines of both commercial hybrids, carrying the heterotic segment of the BLS14 line.

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