Genetic Variability for Antioxidant Contents and Their Capacity of Selected 20 Landrace Rice Genotypes Based on Good Agronomic Traits
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Abstract
Exploring the rice germplasm with high genetic variability is an important step for a rice breeding program for increased nutritional components. Thus, the objective of this study was to evaluate the genetic variability of the antioxidants and their capacities in 20 landrace rice genotypes. The experiment was conducted in two locations, consisting of (1) the Experimental Field, Department of Agricultural Technology, Thammasat University, Pathum Thani province, and (2) the landrace rice farmers’ field, Ubon Ratchathani province. The results indicated that genotype, location, and location by genotype interaction were statistically different for all studied traits. Variations due to genotype were significant for total phenolic content, total flavonoid content, and ABTS free radical scavenging activity, accounting for 59.07, 76.58, and 66.85 % of total variations, respectively. In contrast, variation due to location was considerable for ABTS free radical scavenging activity (94.13 % of total variation). Moreover, TU-123, TU-130, TU-145, and TU-148 rice genotypes exhibited high adaptability for antioxidants and their capacities across two locations. As a result, these promising rice germplasms will be chosen for use as genetic materials in rice breeding.
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