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The presented study sought to phenotype the rice cultivars procured from the Unique Scientific Installation (USI) -Collection of Federal Scientific Rice Centre, Krasnodar, Russian Federation, as sources of valuable grain quality traits, as well as BC 2 populations with the selection of the best genotypes for quality traits in developing the red grain rice cultivars with high nutritional properties.The studied rice plant material, grown in the artificial climate chambers of FSBSI -Federal Scientific Rice Centre, had the following conditions: temperature -28-30 °C during the day (12 h) and 24 °C at night (12 h); illumination -30,000 lux, and humidity = 70%.Rice determination and phenotyping for grain quality traits commenced on high-tech certified equipment per GOSTs.The experiment results had the parental genotypes used in the backcrossing program assigned to the group of medium-grain cultivars, except for the long-grain cultivars, i.e., Svetlana and Gagat.The 1000-grain weight ranged from 23.0 to 27.4 g, filminess (17.8% to 19.9%), and total milling yield (65.0% to 70.4%).Low fracturing appeared in rice cultivars, viz., Rubin, Alliance, Kurazh, Gagat, and VNIIR10163, while a high vitreosity emerged in rice cultivars Veles, Svetlana, VNIIR10163, and Khaw-sri-nin.BC 2 plant populations' evaluation depended on the technological quality traits.The effective heterosis was evident for most grain quality traits.Rice genotypes selected based on lower fracturing and higher grain size will undergo further breeding work to develop the high-yielding rice genotypes with desirable grain quality traits.
ZHM MUKHINA (Thu,) studied this question.