Journal of Applied and Natural Science 7 (1): 149–154 (2015)
Genetic variability, heritability and genetic advance estimates in maize (Zea mays L.) inbred lines
R. T. Maruthi 1* and K. Jhansi Rani2
1Crop Improvement Division, Central Research Institute for Jute & Allied Fibres, Barrackpore, Kolkata- 700 120 (West Bengal), INDIA
2Department of Seed Science and Technology, ANGRAU, Rajendranagar, Hyderabad-500 030 (Andhra Pradesh), INDIA
*Corresponding author. E-mail: firstname.lastname@example.org
Abstract : Forty three genotypes of maize were evaluated for eleven traits at the College Farm,
College of Agriculture, Rajendranagar, Hyderabad to study the genetic divergence and various genetic parameters.
There was a significant (P<0.01) difference between genotypes for all the characters, which revealed wide range of
variability and high heritability for all the characters. The genetic advance as percent of mean was high for grain
yield per plant (73.19%), ear height (51.05%), number of kernels per row (44.40%), plant height (43.46%), 100 grain
weight (42.88%), ear length (30.79%), number of kernel rows per ear (25.23%), and ear girth (22.37%) indicating additive
gene action for these traits. D2 analysis partitioned the forty three genotypes in to six clusters. The maximum inter cluster
distance (39.38) was observed between cluster I and cluster V. Grain yield per plant (38.43%), plant height (14.29%),
100 grain weight (12.85%) and number of kernels per row (12.07%) contributed greatly towards diversity.
Keywords : Cluster analysis, Genetic advance, Heritability, Maize