Abstract
The present study was carried out to investigate the correlation coefficient, path analysis and genetic variability among some barley varieties for nine characters in a Randomize Block Design (RBD) with three replications in three environments of Bangladesh. High genotypic coefficient of variation (GCV) was obtained from grain/ spike (29.89 %), yield/ plant (28.72%) and effective tiller/plant (21.86 %) and spike length (13.56 %). The characters with high GCV indicated high potential for selection. The highest heritability (Hb) was observed for 1000 seed weight (95.09) followed by yield/ plant (93.98), grain/ spike (92.09) and spike length (69.93), days to heading (72.65) but the lowest Hb was identified for effective tiller/plant (22.41) followed by the plant height (34.21). Those traits with higher heritability may be considered for selection. Grain/ spike had the highest positive direct effect (5.65) on yield followed by 1000 seed weight (4.65), spike length (1.26), yield/ plant (0.66), days to heading (0.55) and days to maturity (0.34). These parameters were identified as direct selection. Direct negative effect on yield was shown by plant height (-0.32) and effective tiller/plant (-0.74). This was an indication of indirect selection.
 Int. J. Appl. Sci. Biotechnol. Vol 7(2): 243-247
Highlights
Barley (Hordeum vulgare L., 2n=2x=14) is a cereal grain that was domesticated 10,000 years ago in the fertile crescent indicated by different archaeological evidence
The highest Hb was observed for 1000 seed weight (95.09) followed by yield/ plant (93.98), grain/ spike (92.09) and spike length (69.93), days to heading (72.65) but the lowest Hb identified for effective tiller/plant (22.41) followed by the plant height (34.21)
Grain/ spike had the highest positive direct effect (5.65) on yield followed by 1000 seed weight (4.65), spike length (1.26), yield/ plant (0.66), days to heading (0.55) and days to maturity (0.34)
Summary
Barley (Hordeum vulgare L., 2n=2x=14) is a cereal grain that was domesticated 10,000 years ago in the fertile crescent indicated by different archaeological evidence. Barley currently ranks fourth after wheat, maize and rice in terms of total production which has an early maturation and a high level of adaptability to stress environment. It serves as a major animal fodder, as base malt for beer and certain distilled beverages and as a component of various healthy foods. In many countries of the world it is grown with less care and input in stress environment due to its hardiness.
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