International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 1
First page : (992) Last page : (996)
Article doi: http://dx.doi.org/10.18782/2320-7051.5239
Genetic Parameters of Grain Yield and Its Contributing Characters in Pearl Millet (Pennisetum glaucum (L.) R. Br.] Under Varying Environmental Conditions
Rajesh C. Jeeterwal*, L. D. Sharma, Anju Nehra and R. Mundiyara
Division of Plant Breeding and Genetics, Rajasthan Agricultural Research Institute
(SKN Agriculture University), Jaipur (Rajasthan) India
*Corresponding Author E-mail: jeeterwal.raj.pbg@gmail.com
Received: 18.07.2017 | Revised: 26.08.2017 | Accepted: 1.09.2017
ABSTRACT
The present investigation was under taken to the study of genetic analysis in pearl millet in 10x10 diallel set, excluding reciprocals, for grain yield and its 12 component traits, viz., grain yield per plant, days to 50% flowering, days to maturity, productive tillers per plant, plant height, panicle length, panicle girth, biological yield per plant, dry fodder yield per plant, harvest index, test weight, Fe content and Zn content. Genetic components analysis revealed that additive-dominance model fitted for all the characters in all the environments, both additive (D) and dominance (H1 and H2) components were significant for all the characters, except additive (D) component in days to 50% flowering and dry fodder yield in E2 & E3, days to maturity in E2, productive tillers in E3 and plant height, biological yield and grain yield per plant in all the the environments. However, relative magnitude of dominance component(H1 and H2) was higher than additive component for all the characters indicated preponderance of dominant gene action. The ratio of mean degree of dominance as measured by (H1/D)½ was more than unity in all the environments indicating over dominance. The value of (H2/4H1) was less than 0.25 indicating asymmetric distribution of positive and negative alleles. The ratio of dominant to recessive alleles was more than unity in all the environments indicating accumulating of dominant genes. Narrow sense heritability estimates were of low to high magnitude for different traits. Heritability estimates (ns) were high 0.303 in E2 and 0.528 in E3 for Fe content and 0.116 in E1 and 0.117 in E3 for grain yield per plant, but low 0.073 in E2, 0.080 in E1 and 0.131 in E3 for days to maturity. This suggesting that selection based on these traits would lead to rapid genetic improvement. The preponderance of non-additive gene effects of grain yield and its component traits in parents indicated that, heterosis breeding would be practically feasible in pearl millet crop.
Key words: Pearl millet, gene action, heritability, Pennisetum glaucum
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Rajesh C. Jeeterwal, Sharma, L.D., Nehra, A. and Mundiyara, R., Genetic Parameters of Grain Yield and Its Contributing Characters in Pearl Millet (Pennisetum glaucum (L.) R. Br.] Under Varying Environmental Conditions, Int. J. Pure App. Biosci.6(1): 992-996 (2018). doi: http://dx.doi.org/10.18782/2320-7051.5239
