Adaptabilidade e estabilidade de híbridos de canola em diferentes datas de semeadura no município de Cerro Largo/RS

Abstract

Canola is a crop that is gradually gaining space in the southern states of Brazil, being used in the translation of crops in the winter period. Due to the fact that there is still little study on this crop aimed at the Missões Region of Rio Grande do Sul, making it difficult to provide a better recommendation for farmers, this work was developed. Adaptability is when genotypes take advantage of environmental stimuli and stability is when genotypes are predictable in different environments. This work aimed to compare canola hybrids in different sowing data following an Adaptability and Stability analysis proposed by the method of Eberhart and Russell (1966) through a simple linear regression, of easy interpretation. The importance of knowing the interaction between genotype and environment is to recommend the best hybrid according to sowing data. The experiment was carried out in the interior of the municipality of Cerro Largo, RS, in which five canola hybrids were sown on three different data points, with four replications each, using a randomized block design (DBC), with 60 trial units in total. The results were confirmed by the joint analysis of variance to verify the existence of genotype-by-environment interaction between the sowing data for a variety of grain yield, estimating the adaptability and stability parameters by the regression method, using the GENES program. One datum that proved to be adapted for the cultivation of canola in the municipality of Cerro Largo RS in the year 2022 was the date of May 23, presenting a higher average than the general average. The indication is the hybrids Diamond and Nuola 300, both of which have higher productivity values than the average and both have stability and adaptability.