Evaluation of inbred lines derived from commercial hybrids and their utilization in developing high yielding field corn (Zea mays L.) hybrids

Authors

  • Ganapati Mukri Indian Agricultural Research Institute, New Delhi, India-110012
  • Jayant S Bhat Indian Agricultural Research Institute, New Delhi, India-110012
  • R N Gadag Indian Agricultural Research Institute, New Delhi, India-110012
  • B N Motagi University of Agricultural Sciences, Dharwad, India-580005
  • B Manjunatha University of Agricultural and Horticultural Sciences, Shivamogga, India-577204
  • Rajesh Kumar Indian Agricultural Research Institute, New Delhi, India-110012
  • Pal Digvender Indian Agricultural Research Institute, New Delhi, India-110012

Keywords:

Maize, Kernel row number, G×E interaction, Line×Tester, Inbred lines, Hybrids

Abstract

Genetic enhancement and identification of genetically broad-based inbred lines for the development of new hybrids is the pre-requisite for the heterosis breeding. Newly derived 118 inbred lines were evaluated for their morpho-physiological characters in order to identify best suitable male and female parental lines. Total 10 best inbred lines were selected after thorough evaluation of 16 stable inbred lines, identified from the pool of 118 inbred lines. These inbred lines were crossed in line × tester manner, considering three inbred lines as male and
rest as female, based on the Specific Combining Ability and General Combining Ability. Hybrids thus obtained were evaluated in two diverse agroclimatic situations and best heterotic hybrids were selected based on their standard heterosis and rank obtained in Duncan's Multiple Range Test analysis. Single location ANOVA for inbred lines and combined ANOVA for hybrids showed that selected inbreds and hybrids were significantly differing from each other. Since, there exists a Genotype × Environment interaction among hybrids, PCA also taken into consideration for giving weight as classification variable for the hybrids. Further, multi-location evaluation of these hybrids is proposed to identify stable hybrids suitable for large scale commercialization.

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Published

2021-02-17

Issue

Vol. 65 No. 3 (2020)

Section

Articles

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