RUDN Journal of Agronomy and Animal IndustriesRUDN Journal of Agronomy and Animal IndustriesВестник Российского университета дружбы народов. Серия: Агрономия и животноводство2312-797X2312-7988Peoples’ Friendship University of Russia named after Patrice Lumumba1958610.22363/2312-797X-2020-15-3-272-280Genetics and plant breedingГенетика и селекция растенийResearch ArticleEvaluation of yield and its components for some flax genotypesОценка урожайности генотипов льнаOmarTaha AhmedОмарТаха АхмедAgricultural Research Center, Fiber Crops Research Departmentцентр сельскохозяйственных исследований, департамент исследований прядильных культурdrtahaomar@yahoo.comField Crops Research InstituteИнститут исследований полевых культур15122020153VOL 15, NO3 (2020)ТОМ 15, №3 (2020)27228030092020Copyright ©; 2020, Omar T.A.Copyright ©; 2020, Омар Т.А.2020Omar T.A.Омар Т.А.http://creativecommons.org/licenses/by/4.0https://agrojournal.rudn.ru/agronomy/article/view/19586Sixteen flax ( Linum usitatissimum L.) genotypes were evaluated at Gemmeiza Agricultural Research Station, Agricultural Research Center, El-Gharbia Governorate, Egypt during the two successive seasons 2015/2016 and 2016/2017. Randomized complete block design with three replications was used. Phenotypic and genotypic coefficients of variation for all studied traits had closely values. High heritability coupled with high genetic advance (as % of mean) for most studied traits. Plant height, technical length and stem diameter were the best selection indices to improve straw yield /plant, along with number of branches, capsules and seeds were effective selection criteria for improving seed yield /plant as proven by phenotypic and genotypic correlationШестнадцать генотипов льна Linum usitatissimum L. исследованы по показателям урожайности на сельскохозяйственной исследовательской станции Геммейза в Центре сельскохозяйственных исследований (Египет, мухафаза Эль-Гарбия) в течение двух вегетационных периодов 2015/2016 и 2016/2017 гг. Блочный рандомизированный эксперимент выполнялся с тремя повторностями. Фенотипические и генотипические коэффициенты вариации для всех изученных признаков имели близкие значения. Высокая наследуемость коррелировала с высоким генетическим прогрессом,% от среднего, для большинства изученных признаков. Высота растения, техническая длина и диаметр стебля служили лучшими критериями для контроля увеличения урожайности. Количество ветвей, коробочек и семян также использовались и были не менее эффективными критериями отбора для повышения урожайности растений льна, что подтвердилось фенотипической и генотипической корреляцией.Flaxgenetic variabilitycorrelationheritabilitygenetic advanceленгенетическая изменчивостькорреляциянаследственностьгенетический прогресс1.Mourad NKM, Mostafa SHA, Zahana AEA. Yield components, quality and variabity assessment of some flax genotypes. Egypt J plant Breed. 2003; 7(2):129-142.2.Abd El-Daiem MAM, El-Borhamy AMA. Effect of nitrogen, phosphor and potassium fertilization on yield of flax and quality under sandy soils. J Plant Production. 2015; 6(6):1063-1075. doi: 10.21608/jpp.2015.498303.Al-Sadek MSA, Abd El-Haleem RA, Abo-Kaied HMH. 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