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Khasi mandarin (Citrus reticulata Blanco.) is one of the most widely cultivated and important commercial fruit crop of North Eastern region. During 2005-2010, a survey was conducted for identification of superior Khasi mandarin genotypes in relation to growth, yield, quality, pest and disease tolerance from different places of North Eastern region. After thorough survey, eight elite Khasi mandarin genotypes were selected and collected for maintaining at Citrus Research Station, AAU, Tinsukia in 2011. Among the growth characters, CRS-4 was found to be the highest for most of the characters viz., plant height (4.37m), stem girth (13.47cm), N-S plant spread (4.67m), E-W plant spread (5.10m) and crop canopy volume (49.67m³). CRS-4 recorded highest for most of the yield and yield attributing characters viz., fruit length (7.13cm), fruit width (8.57cm), fruits per plant (782.67), fruit yield per plant (146.33kg), fruit yield (35.63t/ha) and fruit weight (172.67g). In quality parameters also, CRS-4 exhibit the best for most of the characters viz., juice content, TSS content, ascorbic acid, TSS:Acid, reducing sugar, non-reducing sugar, total sugar and shelf-life. Further, CRS-7 was observed to be comparatively tolerant to biotic stresses. 

Key words: Khasi mandarin, Fruit, Growth, Yield, Quality, North East