Heritability and trait association studies in maize F1 hybrids
Paper Details
Heritability and trait association studies in maize F1 hybrids
Abstract
Maize is the important staple food in many part of the world. Genetic variation in the breeding material and performance of hybrids are important to determine breeding strategies and heterosis. The experiment was conducted to evaluate eighty-one maize hybrids using alpha lattice design with three replications in experimental spot of National Agricultural Research Centre Islamabad, Pakistan. The data were collected for plant height, ear height, flag leaf area, ear leaf area, days to 50% tasseling, days to 50% silking, days to 50% anthesis, anthesis silking interval, chlorophyll content, ear length, number of cobs row-1, fresh ear weight, kernels rows ear-1, kernels row-1, 100-kernel weight, grain moisture, ear diameter, cob diameter and grain yield. Statistically significant differences were observed among the genotypes. Plant height (38.5), ear height (32.6), days to 50% tasseling (48.4), 100-kernels weight (42.3), ear length (49.5), ear diameter (40.0) and cob diameter (28.5) revealed moderate heritability. High genetic advance was observed for all the traits except chlorophyll content. Grain yield showed positive correlation with plant height (0.35), ear height (0.29), days to silking (0.10), anthesis silking interval (0.07), fresh ear weight (0.51), 100-kernel weight (0.04), ear length (0.24), kernel rows ear-1 (0.10), kernels row-1(0.19), ear diameter (0.07) and cob diameter (0.09). Variability among genotypes for the characters indicated the worth of selection for these characters in the genetic material used for upcoming improvement. The present research discloses that better yield response could be achieved through direct selection scheme in maize hybrids.
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