ISSN 2375-1134
African Journal of Agriculture ISSN 2375-1134 Vol. 6 (12), pp. 001-007, December, 2019. © International Scholars Journals
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.
Accepted 24 May, 2019
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.