In this study, agro-morphological properties, phenolic
compounds,
and organic acid contents in the fruits of service tree (Sorbus domesticaL.) genotypes naturally grown in
Türkiye (Bolu) were determined. The fruit weights of genotypes
were found to be quite variable, ranging from 5.42 g (14MR05) to 12.54
g (14MR07). The highestL*,a*,
andb* fruit external color values were found to
be 34.65 (14MR04), 10.48 (14MR09), and 9.10 (14MR08), respectively.
The highest chroma and hue values were recorded as 12.87 (14MR09)
and 49.07 (14MR04), respectively. 14MR03 and 14MR08 genotypes exhibited
the highest amount of soluble solid content and titratable acidity
(TA) as 20.58 and 1.55%, respectively. The pH value was found to be
in the range of 3.98 (14MR010)–4.32 (14MR04). Chlorogenic acid
(14MR10, 48.49 mg/100 g), ferulic acid (14MR10, 36.93 mg/100 g), and
rutin (14MR05, 36.95 mg/100 g) were predominant phenolic acids observed
in the fruits of service tree genotypes. The predominant organic acid
in all fruit samples was malic acid (14MR07, 34.14 g/kg fresh weight
basis), and the highest quantity of vitamin C was detected at 95.83
mg/100 g in genotype 14MR02. Principal component analyses (%) were
performed to determine the correlation between the morphological–physicochemical
(60.6%) and biochemical characteristics of genotypes (phenolic compounds:
54.3%; organic acids and vitamin C: 79.9%). It was determined that
measured genotypes were important genetic resources in terms of nutritional
value.