Genetic Analysis of Grain Yield Related Traits in Rice

• Published in: Tulīd va Farāvarī-i Maḥṣūlāt-i Zirā̒ī va Bāghī Vol. 4; no. 14; pp. 161 - 173
• Main Authors: S. S. Zarbafi, B. Rabiei, M. Allahgholipour
• Format: Journal Article
• Language: Persian
• Published: Isfahan University of Technology 01.03.2015
• Subjects: Diallel; Gene action; Hayman graphical analysis; Heritability; Rice
• ISSN: 2251-8517

To determine gene action and heritability of grain yield related traits in rice, six rice varieties including Hashemi, Vandana, Kadous, Hassani, Shahpasand and IR36 were crossed in a diallel design in 2010. The parents and seeds of F1 generation (36 genotypes) were grown in a completely randomized block design with three replications at the Research Field of the Rice Research Institute of Iran-Rasht in 2011. In this experiment, the yield related traits including grain yield, number of panicles per plant, number of spikelet’s per panicle, 1000-grain weight, plant height, panicle length and flag leaf area were measured in each experimental unit. Evaluation of the gene action based on the Hayman graphical method indicated that 1000-grain weight was controlled by partial dominance effect and the other attributes were controlled by complete dominance to over-dominance effects. Broad-sense heritability varied from 54.91% to 99.84% for flag leaf area and plant height, respectively and narrow-sense heritability ranged from 26.04% to 88.68% for panicle length and 1000-grain weight, respectively. Results of this research showed that the additive gene effect can be used to improve several traits including 1000-grain weight, but utilizing the heterosis phenomenon and hybrid production is recommended to improve the remaining traits in the studied population.