Predicted genetic gains weighted by selection pressures for grain quality in irrigated rice

Abstract The objective of this work was to analyze components variances and heritabilities, estimate selection gain, evaluate the different pressures for physical quality attributes grains families segregating generations irrigated rice (Oryza sativa), through REML/BLUP methodology. experiment conducted in state Rio Grande do Sul, Brazil, where selections were made F3, F4, F5 generations, 2015/2016, 2016/2017, 2017/2018 crop seasons, eight populations (families) from crosses. Intrinsic attributes, genetic parameters, response evaluated using pressures. obtained estimates showed gains characters related grain quality, mainly total chalky area, vitreous whiteness, ratio between whiteness percentage whole broken grains, early generations. used show satisfactory results, being superior control cultivars. For most characters, broad-sense heritability are considered intermediate, together with other showing possibility attributes. a pressure 10% is very promising