Adaptability and stability of maize landrace varieties

Barboza Reis de Oliveira, RaquelMaria Pinto Moreira, RosângelaMaldonado Ferreira, Josué

 Maize landrace varieties are known to be adaptable to different environmental conditions. The objective of this work was to estimate and compare adaptability and stability parameters of 12 maize landrace varieties during two cycles of recurrent selection. The study used grain yield data from eight experiments in the first selection cycle (Group I) and seven experiments in the second cycle (Group II). The experiments were conducted in Paraná and Santa Catarina states. Each experiment evaluated 12 maize landrace varieties and one control variety, BR106. The experiments involved a randomized complete block design in which four methodologies were used to analyze variety stability and adaptability. The majority of the maize landraces assessed were competitive with the control BR 106 in the environments studied. Different adaptability and stability outcomes were verified for both groups. The varieties Macaco, Amarelão and Carioca, from Group I, and Palha Roxa, Amarelão and Astequinha Sabugo Fino, from Group II, showed superior average grain yield, general adaptability and stability.

1. Melhoramento vegetal
2. Family farm
3. Genotypes x environments interaction
4. Zea mays
5. ptrticipatory breeding.