Biochemical evaluation of food quality traits in hulless barley genotypes
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Date
2018
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Punjab Agricultural University, Ludhiana
Abstract
Thirty six hulless barley genotypes along with eight checks were evaluated for their biochemical constituents and quality traits during 2016-17 and 2017-18. The average content of β-glucan, protein, starch, amylose, amylopectin and ash was found to be in the range of 3.71 to 5.06%, 10.35 to 15.00%, 60.89 to 68.26%, 10.13 to 23.53%, 42.82 to 52.17% and 1.37 to 2.18% respectively. One hulless barley genotype BHS 352 has been identified to possess higher content of β-glucan (5.06%). Being rich in soluble dietary fibre β-glucan this genotype can be used for the persons suffering from cardiovascular diseases and Type-II diabetes. These genotypes were also evaluated for their bold grains content which was found to be in the range of 4.00 to 90.00%. Higher bold grain percentage represents the soundness and fulfillment of grains. The grain hardness and test weight of barley genotypes ranged from 9.90 to 15.64 kg and 48.70 to 76.75kg/hl respectively. The genotypes were categorized into low, medium and high on the basis of biochemical and quality traits. The genotypes were grouped into two clusters by using WPGMA (Weighted Pair Group Method with Arithmetic Mean), thus showing sufficient genetic diversity for biochemical and quality traits. The cluster II having the genotypes BL 1678, BL 1679 have good amount of bold grains, amylose and hectolitre weight. These genotypes can be used by the diabetic people as high amylose content will contribute less to the glycemic index. Hectolitre weight of barley genotypes was found to have positive correlation with starch and amylose. β-glucan in barley genotypes showed positive correlation with total proteins. In overall study, genotypes namely BL 1678, BL 1705 and BL 1708 were found to be excellent for biochemical and quality traits and can be further used in the breeding programmes.
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