Current Advances in Agricultural Sciences(An International Journal)
  • Year: 2011
  • Volume: 3
  • Issue: 2

Studies of genetic diversity in quality protein maize (Zea mays L.) inbreds

  • Author:
  • Vinay Kumar, PK Singh1, Astha Gupta2
  • Total Page Count: 4
  • Page Number: 96 to 99

1Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India; Email: pksbhu@gmail.com

2Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India, sucessfulastha33@gmail.com

Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221 005, Uttar Pradesh, India

Online published on 15 October, 2015.

Abstract

Using D2 analysis, twenty inbreds of maize (Zea mays L.) were categorized based on genetic diversity into six clusters. Among them, clusters III, IV, V and VI were monogenotypic, rest cluster I and II were polygenotypic based on genetic divergence. Intra cluster values ranged from zero (monogenotypic cluster III, IV, V, VI) to 172.92 (cluster II). Minimum inter cluster distance was observed between cluster III and V (204.20), while maximum inter cluster distance was observed between cluster I and V (1512.43) suggesting that genotype of these clusters may be used in hybridization programme. Phenotypic coefficient of variability (PCV) was slightly higher than that of genotypic coefficient of variability (GCV) for all characters. Estimates of heritability (in broad sense) ranged from 0.926 (ear diameter without husk) to 0.999 (1000-grain weight). 1000-grain weight showed highest heritability with genetic advance followed by yield plot−1 and yield plant−1, respectively.

Keywords

Genetic advance, Genetic divergence, Heritability, Quality protein maize