African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Genetic analysis of some quantitative traits in bread wheat across environments

Farhad Ahmad1, Saleem Khan1*, Sahibzada Qayyum Ahmad1, Hakim Khan2, Ayub Khan2 and Fida Muhammad3
  1Agricultural Research Station, Baffa, Mansehra, KPK, Pakistan. 2Department of Agriculture, Hazara University Mansehra, Pakistan. 3Department of Plant Breeding and Genetics, Agricultural University Peshawar, Pakistan.
Email: [email protected]

  •  Accepted: 24 December 2010
  •  Published: 04 February 2011

Abstract

 

Performance of eight bread wheat (Triticum aestivum L.) genotypes; namely, Wafaq-2001, Takbeer, Tatara, Iqbal-2000, Margalla-99, Ghaznavi-98, Khattakwal and Inqalab-91, were evaluated under three diverse environments (early, normal and late sown conditions) through an 8x8 diallel cross. Observations were recorded on days to heading, productive tillers plant-1, number of grains spike-1, 1000-grain weight and grain yield plant-1. Highly significant differences were observed among the genotypes for all traits. Analysis of genetic components revealed significant additive (D) and dominant (H) genetic variations for days to heading, productive tillers plant-1, number of grains spike-1, 1000-grain weight and grain yield plant-1 under early planting. Under normal planting both additive (D) and dominant (H) genetic components were significant for days to heading, productive tillers plant-1, grain yield plant-1 and 1000-grain weight. Similarly, under late planting significant additive (D) and dominant (H) genetic variations were observed for number of grains spike-1 and grain yield plant-1, while for 1000-grain weight only additive (D) genetic component was found significant. Genetic analyses of the traits confirm the involvement of both additive and non-additive gene effects in governing the inheritance.

 

Key words: Genetic analysis, bread wheat, quantitative traits, environmental variations.