The Indian Journal of Genetics and Plant Breeding

SCOPUSWeb of Science
  • Year: 1994
  • Volume: 54
  • Issue: 2

Relative usefulness of triple test cross methods for estimating additive and dominance in bread wheat

  • Author:
  • Iqbal Singh, Mohd. Yunus
  • Total Page Count: 5
  • DOI:
  • Page Number: 120 to 124

Department of Plant Breeding, CCS Haryana Agricultural University, Hisar 125004.

* Present address: 10/70, New Campus, CCS Haryana Agricultural University, Hisar 125004.

Abstract

Forty-five triple test cross progenies of wheat were produced by crossing 15 true breeding lines/varieties with three testers and grown in normal and stress environments. The data on parents and F1s were analysed for days to heading, plant height, tillers/plant, total biomass, grains/ear, 1000-grain weight and grain-yield/plant to determine the relative usefulness of three methods for estimation of additive and dominance components of genetic variation. The variance of parents () estimated the additive component better than the two other methods (1i + 2i and 1i + 2i + 3i). The methods 4 + 9 σ2 (1i + 2i - 1) and 25 (σ2 (2 1i-i) pooled with σ2 (2 2i-i)] provided better estimates of dominance component than 1i-2i method in the presence of epistasis. These two methods also gave similar estimates of dominance component.

Keywords

Triticum aestivum, relative usefulness, triple test cross, additive and dominance components