Studies on heritability and genetic variability for grain physical properties in Malaysian rice germplasm

• Published in: IOP conference series. Earth and environmental science Vol. 482; no. 1; pp. 12022 - 12027
• Main Authors: Saidon, S A, Kamaruzaman, R, Razak, M S F A, Ramli, A, Sarif, H M, Zuki, Z M, Rahman, S N A, Devarajan, T, Sunian, E
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.03.2020
• Subjects: Coefficient of variation; Cooking; Elongation; Gene banks; genetic advance; Genetic variability; genotypic coefficient of variation (GCV); Germplasm; Grain; Heredity; Heritability; Kernels; phenotypic coefficient of variation (PCV); Phenotypic variations; Physical properties; Rice
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/482/1/012022

Genetic based information of different traits plays important role in varietal improvement of rice. Twenty rice accessions (Oryza sativa L.) obtained from National Rice Gene Bank were evaluated during main season 2015/2016 to estimate heritability, genetic variability and genetic advance for seven grain physical properties. Among the traits, milled grain length/width ratio, milled grain length, milled grain length after cooking and grain length exhibited high estimates of phenotypic coefficient of variation (PCV), and genotypic coefficient of variation (GCV). Highest broad sense heritability and genetic advance was obtained for grain length (98.66% and 62.25%), milled grain length (98.95% and 67.31%), milled grain length/width ratio (98.50% and 80.41%) and milled grain length after cooking (98.93% and 65.44%) which suggest these traits are most probably controlled by additive gene action and hence they can be fixed by selection. However, kernel elongation ratio showed lowest value of broad sense heritability and genetic advance (11.76% and 1.38%, respectively) and may suggest non-additive gene action in their inheritance and selection of this trait may difficult due to high environmental influences. Therefore, improvement of high quality rice with kernel elongation ability may require molecular marker application as it is highly affected by environment for precise selection.