Genetic Variability and Path Analysis Studies in Barley (Hordeum vulgare L.)

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

Assessment of Genetic Variations and Interrelationships Among Agronomic Traits in Advanced Breeding Barley Lines Under Salinity Condition

“…These results proved the greater role of genetic components and the phenotypic expression is weakly affected by the environmental factors and so promising the evidence that the improvements of these traits would be successful and effective through selection basing on the phenotypic performance according to the wide of variation among the various investigated characters in all generations. These calculations are compatible with those of Hailu et al (2016), Oraby et al (2018), Matin et al (2019) and Yadav et al (2019). In the same table, broad sense heritability revealed high measures with highness in its limit values ranged from 71.1 to 89.47 of all traits in most genotypes in the three generations and these probably due to the presence of great differences among the average data of these traits that permit successful selection among them to develop new salt-tolerant genotypes.…”

“…In the same table, broad sense heritability revealed high measures with highness in its limit values ranged from 71.1 to 89.47 of all traits in most genotypes in the three generations and these probably due to the presence of great differences among the average data of these traits that permit successful selection among them to develop new salt-tolerant genotypes. In this connect the results of Shrimali et al (2017), Arshadi et al (2018), Oraby et al (2018), Matin et al (2019) and Dyulgerova and Dyulgerov (2020) came in support with ours.…”

“…However, as for F6 the grain weight/spike was 0.32 and the number of tillers/plant (0.26) via the biological yield; while grain weight/spike (0.38) and number of grains/spike (0.85) induced the same indirect effect in F7 generation by the biological yield also. Likewise, Eshghi et al (2011), Mohtashami (2015, Tofiq et al (2015 and, Amardeep et al (2017), Sunil et al (2017, Malik et al (2018), Matin et al (2019) and Yadav et al (2019) obtained similar results. Moreover, principal components (PCs) were computed for determining the interrelationship among agronomic traits over the three generations (Fig.…”

Stomatal Traits and Barley (Hordeum vulgare L.) Forage Yield in Drought Conditions of Northeastern Mexico

“…In crop plant breeding, the study of interrelations among traits that determine yield has been done using correlation and path coefficients [ 20 ], in order to break down the direct and indirect effects of the correlations as a way to estimate the relative importance of causal factors. In grain barley, the direct effect of several agronomic variables on grain yield has been studied [ 21 , 22 , 23 , 24 ]. However, little is known about the direct effects of agronomic variables on forage and even less is known about the relationship between stomatal variables and forage yield.…”

Evaluation of Breeding Improvement for Spring Barley Varieties in Terms of Yield and Yield-Related Traits

“…Thereby yield increasing depends on genetic improvement and the optimal combination of these individual traits (Sharma et al, 2018;Hu et al, 2018). That is why the level of manifestation and interrelation between yield and its structural components has received considerable attention in breeding and genetic studies (Abdullah et al, 2018;Matin et al, 2019). The information about already achieved level of manifestation of yield-related traits in previously developed varieties has the practical worth for the purpose of consistent improvement of new varieties (Mirosavljević et al, 2016).…”