Adaptability and stability of low-cost corn seed cultivars in the Brazilian Central Region
DOI:
https://doi.org/10.33448/rsd-v15i5.51034Keywords:
Maize, MHPRVG, OPVs , Productivity.Abstract
The objective of this study was to identify low-cost maize seed varieties and hybrids with high production potential, with broad adaptability and high stability for the central region of Brazil. The adaptability and stability of 168 maize genotypes (122 Open Pollinated Maize Varieties “OPVs”, 19 Inter-varietal Hybrids “IHs”, 13 Top-crosses Hybrids “TCHs”, 6 Double-cross Hybrids “DHs”, 4 single-cross hybrids “SHs” and 4 three-way-cross hybrids “THs”) were evaluated in a series of trials for the value of cultivation and use (VCU), between 15 consecutive years (2002/3 to 2016/17 growing seasons), in the localities of Sete Lagoas - MG, Londrina - PR and Planaltina-DF. The experimental design was a randomized block design, with two replicates. The estimates of the genetic parameters were obtained using the Reml / Blup procedure, using the model that considers the three main effects (genotypes, sites and years), as well as their interactions, providing a simultaneous measure of productivity, stability and adaptability (MHPRVG) for each evaluated cultivar. Twelve OPVs with high grain yield, adaptability and stability were selected. In spite of the identification of these varieties, it was verified that low-cost hybrid seeds are an excellent alternative for the family farming, since they have potential production compatible with commercial hybrids, making it worth highlighting three IH and two TCH.
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