Abstract
To analyze genetic divergence 22 strawberry genotypes (Fragaria x ananassa Duch.) were studied for six bioactive compounds traits at Central Institute of Temperate Horticulture (CITH), Srinagar, India. The maximum PCV and GCV were estimated for the total phenol content (23.78 and 23.87) followed by vitamin C (22.39 and 22.48). The heritability was highest for total phenols (99.61%) and DDPH (99.18). Genotypic correlation was of higher magnitude to the corresponding phenotypic ones. Titrable acidity exhibited highly negative association with vitamin C whereas total phenol content was showed significantly negative correlation with vitamin C but positive association with titrable acidity and total anthocyanin contents. DPPH and vitamin C negatively correlated, however DPPH exhibited highly positive and significant association with titrable acidity, total anthocyanin and total phenol contents. In path analysis, highest positive direct effect was exhibited by total phenol content (0.937) the highest negative direct effect by total flavonols (-0.055). The selection based on higher total phenols, titrable acidity and total anthocyanin contents will be beneficial for enhancing the total antioxidant potential attributes of strawberry germplam for commercial utilization and processing. The information also could be utilized to increase the nutritional value of different foods and diets in the prevention of chronic human diseases using strawberry genotypes having higher bioactive compounds.SAARC J. Agri., 14(1): 81-91 (2016)
Highlights
Strawberries belong to the genus Fragaria that consists of several diverse species of varying ploidy levels with a wide geographic distribution among species (Hancock, 1999)
Maximum variability recorded in total phenol content ranged from 372.45- 914.29 followed by total antioxidant potential (DPPH) 199.38-481.12, vitamin-C 50.4091.27, total flavonols 31.07-56.56, total anthocyanine 28.01- 44.35 and least in titrable acidity 0.727- 1.46
Maximum PCV and GCV estimated for the total phenol content (23.78 and 23.87) followed by total antioxidant potential (22.48, 22.39), titrable acidity (18.55, 18.43), vitamin-C (15.73, 15.61), total flavonols (13.88, 13.69) and total anthocyanin contents (12.74, 12.56)
Summary
Strawberries belong to the genus Fragaria that consists of several diverse species of varying ploidy levels with a wide geographic distribution among species (Hancock, 1999) It is one of the most preferred and excellent berry fruit for its sweet flavor and attraction. Detailed information on antioxidant properties of these cultivars with desired genetic architecture rich in nutraceutical content will serve as a reference material to develop nutraceutical rich strawberry. Generation of such information will benefit breeders, processors and general consumer. The present investigation was undertaken to assess genetic divergence among the 22 strawberry genotypes for six different bioactive compounds, their correlation with each other and their direct and indirect contribution to total antioxidant potential
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