MORPHOLOGICAL FEATURES AND YIELD EVALUATION OF ONION GENOTYPES IN ACID SOIL

Abstract

An experiment was conducted to study the morphological and yield characters with five genotypes Choto Bombay onion (control), Big Bombay onion, Special Bombay onion, Uz-1 and Uz-2 onion at the research farm of Sylhet Agricultural University, Sylhet from November 2013 to July 2014 with a view to select the suitable genotypes based on higher yielding abilities in acidic soil condition. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The experimental field was divided into three blocks representing three replications and each block had five individual plots with five genotypes that are evaluated on the basis of morphology and yield characteristics. Choto Bombay Onion (control), Two Indian cultivars namely Special Bombay Onion and Big Bombay Onion were collected from seed market at Dhaka while another two cultivars Uz-1 and Uz-2 were collected from Uzbekistan. Results revealed that high yielding genotype was Uz-2 which had highest in bulb fresh weight. The genotype Uz-2 was maximum in Bulb fresh weight, leaf sheath diameter, root fresh weight and bulb diameter and had contain highest moisture content. The genotype Uz1 onion was maximum in leaf blade diameter, leaf blade length, leaf blade fresh weight and root

fresh weight whereas bulb length, bulb dry weight, leaf sheath length, leaf sheath dry weight and

leaf blade dry weight

was highest recorded in Special Bombay Onion. In maximum parameter Choto Bombay onion was lowest except leaf sheath length, root fresh weight, leaf sheath fresh weight, root dry weight, bulb dry weight and leaf sheath dry weight. Considering yield and yield contributing characters Uz-2 can be selected as the best genotype for Sylhet region.