Agricultural Science Digest
SCOPUS
  • Year: 2025
  • Volume: 45
  • Issue: 5

Generation Mean Analysis using Six Parameters Genetic Model for Quantitative Traits in Quality Protein Maize (Zea mays L.)

  • Author:
  • K. Vinay Teja1, K. Krishnam Raju1,*, Anjan Roy1, Satyabratha Nanda2, Swapnil1, Sanghamitra Rout1, Poulami Sil1, Vishal Kumar Gupta1, Vidadala Rajendra1
  • Total Page Count: 8
  • Page Number: 787 to 794

1Department of Genetics and Plant Breeding, M.S Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi-761 211, Odisha, India

2Department of Biotechology, Centurion University of Technology and Management, Bhubaneswar, Khurda-752 050, Odisha, India

*Corresponding Author: K. Krishnam Raju, Department of Genetics and Plant Breeding, M.S Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi-761 211, Odisha, India, Email: k.krishnam@cutm.ac.in

Online published on 29 October, 2025.

Abstract

Discovery of maize mutants in the mid-1960s containing the opaque-2 gene which enhances levels of lysine and tryptophan in the endosperm protein opened a new era in breeding for improvement of quality in maize.

The present study aimed to perform a generation mean analysis of two quality protein maize (QPM) (Zea mays L.) crosses CML332 × CML145 and CML167 × CML330 during zaid, 2023 P.G Research Farm, MSSSoA, Paralakhemudi. To, determine the genetic effects along with nature of gene action.

Dominance variance showed more importance than additive variance and the presence of duplicate form of non-allelic gene interaction was prevalent for all the characters studied except days to 50% tasseling in CML332 × CML145 and catalase in CML167 × CML330 which showed complementary gene action. Characters with duplicate gene interactions, grain yield per plant in CML167 × CML330 and number of kernels row-1 in CML332 × CML145 showed strong dominance and dominance × dominance gene interaction. Selection could be rewarding for consecutive populations followed after bi-parental mating design to improve these traits.

Keywords

Additive and dominance effect, Generation mean analysis, Non-allelic interactions, Quality protein maize