Vol. 11, Issue 7 (2022)

Author(s):
Viveka Nand Yadav, RK Yadav, HC Singh, Shweta, Ajay Kumar and Nrendra Kumar

Abstract:
An experiment consisting 45 single crosses derived from Line x Tester with parents and two standard check of maize were conducted at two different locations Kanpur and Aligarh with two diverse environments during Kharif (2018) and Rabi (2018-19). The data were collected on five randomely selected plants from each parent and their F₁s in each replication for 13 yield attributed traits namely Days to 50% tasseling, Days to 50% silking, Days to 75% dry husk, Plant height (cm), Number of cobs per plant, Cob weight (g), Number of grain rows per cob, Number of grains per row, Grain weight per cob (g), Shelling percentage (%), 100 kernel weight (g), Grain yield per plant and Seed vigour index. The data so generated were subjected for statistical analysis as usual procedure while Variability was computed by Burton (1952) and Johnson et al. (1955). Similarly. The phenotypic, genotypic and environmental coefficients of correlation were computed as per the methods suggested by Robinson et al. (1951). The analysis of variance over the environments showed highly significant differences among parents and crosses revealing sufficient quantity of variations in the genetic materials used in study. Highest PCV was observed for grain yield per plant (g) followed by grain weight per cob (g), cob weight (g) and number of grains per row similarly the GCV was higher for grain yield per plant (g) followed by grain weight per cob (g), cob weight (g) and number of grains per row while lower PCV was observed for days to 75% dry husk followed by days to 50% silking, Days to 50% tasseling and shelling percentage (%) and lower PCV was observed for days to 75% dry husk followed by Days to 50% tasseling, days to 50% silking, and shelling percentage (%).At genotypic level the grain yield per plant showed positive and significant correlation with all the characters except days to 50% tasseling, days to 50% silking and days to 75% dry husk which had negatively significant correlation with yield. At phenotypic level in general the associations of characters were lower in magnitude as compared with corresponding genotypic one but same in direction.