Investigation made on the variation in amino acid compositions among selected traditional and newly improved rice varieties cultivated in Sri Lanka is presented. The free amino acid (FAA) composition including gamma-amino butyric acid (GABA) and protein bound total amino acids (TAAs) of eleven traditional and seven improved rice cultivars grown at Batalagoda across the two major cultivating seasons in the country were evaluated. Significant variations (p < 0.05) in GABA levels, individual and total amino acids in free and protein bound form were observed among the studied varieties. Both traditional and improved varieties reported comparable mean total FAAs and TAA levels. However, significantly higher levels of GABA, which has health promoting functional properties, were found in newly improved rice varieties in comparison to the traditional varieties. Significant impact of seasonal variation on total amino acid levels was observed in majority of the varieties with most of the varieties reporting higher amino acid levels when cultivated during the “Maha”, which is the major cultivation season in the country. The Behethheenati rice out of the traditional, while Bg 300 rice out of the newly improved, was found the most beneficial among the investigated varieties. The potential significant contribution obtainable with several local traditional and improved varieties in fulfilling the majority of the recommended essential amino acid nutrient requirement in the daily diet by the world health organization is highlighted.

对斯里兰卡种植的传统水稻和新改良水稻品种中氨基酸组成的变化进行了研究。评估了该国两个主要栽培季节在巴塔拉戈达（Batalagoda）种植的11个传统水稻品种和7个改良水稻品种的游离氨基酸（FAA）组成，包括γ-氨基丁酸（GABA）和蛋白质结合的总氨基酸（TAA）。显着变化（p 在GABA水平上<0.05），在所研究的品种中观察到游离和蛋白结合形式的单个和总氨基酸。传统品种和改良品种均报告了相当的平均FAA和TAA水平。然而，与传统品种相比，在新改良的水稻品种中发现具有促进健康功能特性的GABA含量明显更高。在大多数品种中观察到季节性变化对总氨基酸水平的显着影响，其中大多数品种在“ Maha ”期间（该国的主要栽培季节）种植时，其氨基酸水平较高。该Behethheenati大米走出传统的，而博伽300米在新改良的品种中，被发现是最有利的品种。着重强调了世界卫生组织在满足日常饮食中大多数推荐的必需氨基酸营养需求方面，可以使用几种当地传统和改良品种获得的潜在重大贡献。