evaluation of fruit physicochemical properties and qualitative characteristics of some european pear (pyrus communis l.) genotypes

abstract considering to importance and high genetic diversity of pear (pyrus communis l.) in iran, a study was conducted on the effect of genotype on fruit physicochemical properties and qualitative characteristics of six mature european pear genotypes in teheran, iran environmental conditions. in this study some physicochemical fruit properties and qualitative characteristics such as: fruit length, width, length to width ratio, fruit pedicel length, fruit color, fruit fresh and dry weight, fruit volume, fruit firmness, total soluble solids (tss), titratable acidity (ta), ph and sensory evaluate were monitored based on the descriptors of international plant genetic resources institute (ipgri). results showed significant differences within the studied genotypes in the most fruit characters (p ≤0.05). in addition, it was a diversity within the measured characters in fruit length (ranged from 6.99 to 9.82 cm), fruit width (4.69 to 7.17 cm), fruit length to width ratio (1.23 to 1.59), fruit pedicel length (2.2 to 3.73 cm), fruit color (yellow to yellowish green and green to red with l* value 60.47 to 74.08 and h* value 80.06 to 86.95 and c* value 46.16 to 53.43), fruit fresh weight (80.5 to 308.9 g), fruit dry weight (4.52 to 5.36 g), fruit volume (86.33 to 270.7 cm3), fruit firmness (1 to 2.37 kg/cm2), tss (14.9 to 17.63 οbrix), ta (0.18 to 0.41 % malic acid), tss/ta (40.49 to 92.66) and ph (3.95 to 5.33). results revealed that genotype a95 had better quality and physicochemical properties and qualitative characteristics than other genotypes which can be considered as promising genotype for further evaluations.