Analysis of Quality of Landrace Rice: AG4 variety in An Giang, Vietnam

Abstract

Landrace rice genotypes AG4 were evaluated inTri Ton, Tinh Bien, AnGiang Province with three replications in a field experiment during 2019 to 2020. The analysis revealed significant differences among the genotypes against all the characters studied. In general, phenotypic variance is higher than the corresponding genotypic variance for all the characters studied. AG4 rice is considered as the unique landrace varietal group because of its aroma and superior grain quality.To confirm the presence or absence of fragrance in AG 4,a set of 11 lines was phenotypedby using gas chromatographic separation to quantify 2AP content in milled rice samples. KOH tested and PCR method with two directives RM223 and FMU1-2 are recorded to select the lines with the best fragrance followed by line7, 10 ,14 and 20.The shape is determined by the length and width ratio.From shape evaluation, length and width ratio of AG4 are high. Level of chalkiness is. There are mostly low contents on AG4, when doing rice quality analysing. It is the evidence for the deliciousness on rice. Milling quality determines the final yield and fracture rate of milled rice. Recorded line 7 for high milling rate is over 50%. Protein content of rice varieties ranges from 6.9 to 8.6%. Lines 7 and 56 have the highest protein content (8.5-8.6%). Characters like number of panicles per plant, panicle weightg, number of grains per panicle, and grain yield recorded are high. Grain yield analysis revealed significant differences among lines. Selected AG4, lines number 7 can be used in breed selection program in the nearest future to provide the local need. Keywords— aroma, amylose, chalkiness, genotypic, phenotypic, milling quality.