Evaluation of promising lines in rice ( O r y z a s a t i v a L.) to agronomic and genetic performance under Egyptian conditions Grain Quality of Doubled Haploid Lines in Rice (Oryza sativa L.) Produced by Anther Culture Genetic Analysis to Improve Grain Yield Potential and Associated Agronomic Traits of Rice. Improving Grain Yield in Rice (Oryza Sativa L.) by Estimation of Heterosis, Genetic Components and Correlation Coefficient. Heterosis, Combining ability and Phenotypic Correlation for Some Economic Traits in Rice (Oryza sativa L.)