GENE ACTION APPRAISAL FOR SEED YIELD AND RELATED TRAITS IN BREAD

Authors: N. Akhtar A. Waseem, T. Mehmood S. Bano, A. Raza, Ahsan Aziz
Journal: Journal of Animal and Plant Sciences (JAPS)
ISSN: 1018-7081 (Print), 2309-8694 (Online)
Volume: 28  Issue: 5  Pages: 1457-1465
Year: 2018
DOI: NA
URL: https://doi.org/NA
Publisher: Pakistan Agricultural Scientists Forum

Abstract:
The inheritance pattern understanding of wheat plant traits ( qualitative and quantitative) is the prerequisite to improve seed yield of bread wheat. Gene action for seed yield and yield related parameters were studied by generation mean analysis. Two wheat crosses ( PARI-73 × V-7682 and V-6055 × Chakwal-50) indicated that seed yield and other studied plant traits of crosses PARI-73 × V-7682 and V-6055 × Chakwal-50 showed significant differences among themselves. -1 The model [md] gave the greatest fit for plant height and spikelets spike in both crosses. In aforementioned crosses -1 -1 parameters like plant height, spikelets spike and of grains spike displayed additive or additive × additive of type gene actions which indicated that selection in early generations would improve these yield related traits. However, traits i.e., -1 spike length, seed yield plant and harvest index in cross PARI-73 × V-7682 showed epistatic effects i.e., [i], [j] and [l] types of gene interaction which demonstrated that genetic behaviour of these traits were complex as and needed more attention. Therefore, it concluded that additive genetic effects played a vital role in expression of most of the yield related traits in wheat and careful selection of these traits in segregating populations would be helpful to increase seed yield. desirable combination of plant height, lodging resistance

Keywords: Bread wheat, gene action, epistasis, generation mean analysis.