NAAS Journal

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P-ISSN: 2618-060X, E-ISSN: 2618-0618   |   NAAS: 5.20

2025, Vol. 8, Special Issue 1

Elucidate gene actions, GCV, PCV, and regression coefficient for grain yield in barley (Hordeum vulgare L.)


Kamlesh Kumar, Pratap Narayan Singh, Nageshwar, Sateesh Chand Gaur, Vinay Rojaria, Girish Chandra Tiwari, Upendra Gautam, Kaushal Singh and Ajay Gaur

This study involved 10 parents and their 45 F1s for the estimation of Gene actions for yield contributing traits in barley during the rabi season 2021- 22. The significant value of additive (D) and dominance (H1) variance for all characters except number of effective tillers per plant, spike length, grains weight per spike and protein content, indicated these traits are controlled by both additive and dominance gene action. The ratio of average degree of dominance (Ĥ1/D̂) reflects the presence of overdominance for all the attributes in both generations except for no of grain per spike in F2. The ratio of dominant and recessive genes [(41)0.5+F/(41)0.5-F] observed more than unity for almost all the characters except for 1000 grain weight, indicated distribution of dominant genes for concern traits. The regression coefficient ‘b’ deviated significantly from unity indicating non-allelic gene action for all the characters in both the generations except no. of spikelets per spike and grain weight per spike. High value of PCV (%) were observed for the characters of number of spikelets per spike, flag leaf area, biological yield per plant (g), harvest index (%) and grain yield per plant (g). Moderate value of GCV (%) were observed for the characters of days to maturity and number of spikelets per spike in F1 generation. The above findings will be useful in the implementation of breeding programs to improve barley.
Pages : 398-402 | 63 Views | 21 Downloads
How to cite this article:
Kamlesh Kumar, Pratap Narayan Singh, Nageshwar, Sateesh Chand Gaur, Vinay Rojaria, Girish Chandra Tiwari, Upendra Gautam, Kaushal Singh, Ajay Gaur. Elucidate gene actions, GCV, PCV, and regression coefficient for grain yield in barley (Hordeum vulgare L.). Int J Res Agron 2025;8(1S):398-402. DOI: 10.33545/2618060X.2025.v8.i1Sf.2452
Call for book chapter