Effects of stratified mass selection on two corn populations and on heterosis of their crosses

Authors

  • Afonso Celso Candeira Valois
  • Roland Vencovsky

DOI:

https://doi.org/10.1590/S1678-3921.pab1983.v18.15432

Keywords:

plant breeding, intervarietal hybrids, recurrent intrapopulational selection, hybrid performance, Dente Paulista, Cateto Minas Gerais

Abstract

The aim of this research was to investigate the effects of stratified mass selection on two corn (Zea mays L.) populations, namely Dante Paulista and Cateto Minas Gerais, and on the performance of the hybrids between these populations in different stages of selection. Dente Paulista was submitted to five cycles of selection and Minas Gerais to three cycles. Yield trials in lattice designs were conducted at three locations totalizing four different environments and thirty-two replications. Appropriate mathematical models were apllied for the analysis of yield values and to investigate the effects of selection on heterosis and the changes of hybrid performances. The result showed that the recurrent intrapopulational selection applied reflected negatively on yield of the population crosses in more advanced stages of selection.

How to Cite

Valois, A. C. C., & Vencovsky, R. (2014). Effects of stratified mass selection on two corn populations and on heterosis of their crosses. Pesquisa Agropecuaria Brasileira, 18(10), 1099–1107. https://doi.org/10.1590/S1678-3921.pab1983.v18.15432

Issue

Section

CROP SCIENCE