Green Global
Foundation   Journal
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DISTINCTNESS, UNIFORMITY AND STABILITY (DUS) CHARACTERIZATION FOR BRRI DEVELOPED RICE VARIETIES OF BANGLADESH (Pages : 13 - 19)

For characterization of the distinctness and uniformity among eighteen newly released rice varieties developed by BRRI, thirty-eight characters were used. Characterization were performed using thirty-eight agro-morphological traits following Distinctiveness, Uniformity and Stability test (DUS) during T. Aman and Boro season of 2018 and 2019, respectively at the Seed Certification Agency (SCA) farm, Gazipur-1701, Bangladesh. Among the 38 DUS characters utilized in the characterization of eighteen rice genotypes, five characters viz., penultimate leaf: ligule, shape of the ligule, anthocyanin colouration of internodes, panicle: attitude of branches, and sterile lemma length of spikelet’s showed no variation and found distinctive among all of the cultivars. Maximum variability was observed with respect to pubescence of penultimate leaf, Spikelet-colour of tip of lemma, Panicle-exertion and Grain-length among all the cultivars. Anthocyanin colour of leaf sheath was present in BRRI dhan80 and BRRI dhan91. Dark green leaves colour was noticed in BRRI dhan86, BRRI dhan91 and BRRI dhan95. Cultivar BRRI dhan86 was identified with the presence of very short yellow white awns. The variety BRRI dhan80 was found with purple stigma while BRRI dhan83 as red, and remarkable purple tip colour of lemma was noticed in BRRI dhan80. Test weight of 1000 fully developed grains and grain length (without dehulling) of BRRI dhan90 were found as very low and very short, respectively. Decorticated unpolished grain colour was white as observed in BRRI dhan80 and BRRI dhan89, while only red colour in BRRI dhan84. Decorticated grain of BRRI dhan80 and BRRI dhan90 was identified based on light aroma. The cultivars BRRI dhan81, BRRI dhan84 and BRRI dhan89 were found chalkiness or size of white core in polish grain. This study will be useful for breeders, researchers and farmers to identify and choose the restoration and conservation of beneficial genes for crop improvement and also to establish proDownload