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Elucidation of Variability, Interrelationships and Path-Coefficient in Maize (Zea mays L.)


Affiliations
1 Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, India
 

In order to study the genetic variability, heritability with genetic advance and character association along with the partitioning of the association into direct and indirect effects in 40 inbreds, an experiment was conducted at the Agricultural Research Farm of Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), India during rabi season of 2011-12. Almost all the characters under study showed highly significant variation. Higher values of genotypic and phenotypic coefficients of variation were observed for the characters like grain yield per plant, number of kernels per row and ear height. Among the characters under study, yield per plant, ear height, number of kernels per row and 100-grain weight showed high heritability coupled with high genetic advance suggesting their importance for direct selection. Correlation studies revealed that number of kernels per row followed by cob diameter, ear height and number of kernel rows per cob exhibited significant positive association with grain yield per plant. Days to 50% tasseling and days to 50% silking showed a negative association with yield. Highest direct positive effect on yield per plant was observed for number of kernels per row followed by a number of kernel rows per cob.

Keywords

Genetic Variability, Zea mays L., Path-Coefficient.
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  • Elucidation of Variability, Interrelationships and Path-Coefficient in Maize (Zea mays L.)

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Authors

Anand Chaudhary
Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, India
Kartikeya Srivastava
Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, India
Vishal Agrawal
Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, India
Santosh Kumar
Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, India

Abstract


In order to study the genetic variability, heritability with genetic advance and character association along with the partitioning of the association into direct and indirect effects in 40 inbreds, an experiment was conducted at the Agricultural Research Farm of Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), India during rabi season of 2011-12. Almost all the characters under study showed highly significant variation. Higher values of genotypic and phenotypic coefficients of variation were observed for the characters like grain yield per plant, number of kernels per row and ear height. Among the characters under study, yield per plant, ear height, number of kernels per row and 100-grain weight showed high heritability coupled with high genetic advance suggesting their importance for direct selection. Correlation studies revealed that number of kernels per row followed by cob diameter, ear height and number of kernel rows per cob exhibited significant positive association with grain yield per plant. Days to 50% tasseling and days to 50% silking showed a negative association with yield. Highest direct positive effect on yield per plant was observed for number of kernels per row followed by a number of kernel rows per cob.

Keywords


Genetic Variability, Zea mays L., Path-Coefficient.

References