International Journal of Agricultural Policy and Research
Vol.2 (9), pp.301-310, September 2014
Article 14/ID/ JPR162, 10 pages
Copyright © 2014 Author(s) retain the copyright of this article. Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 3.0 International License
Original Research Article
Genetic analysis of flag leaf area in the crosses of wheat (Triticum aestivum L.)
Kalim Ullah*1, Muhammad Irfaq Khan2, Imdad Ullah Khan3, Rehmat Ullah Khan4, Zahid Usman1 and Muhammad Ali5
1Cotton Research Station, Dera Ismail Khan, Pakistan Central Cotton Committee, Pakistan.
2Plant Breeding and Genetics Division, Nuclear Institute for Food and Agriculture (NIFA), Peshawar, Pakistan.
3Department of Soil & Environmental Sciences, Faculty of Agriculture, Gomal University D.I.Khan, Pakistan.
4Department of Agricultural Extension and Communication, Faculty of Social Sciences, KP agricultural University, Peshawar, Pakistan.
5Department of Agriculture, University of Swabi, Swabi, Pakistan.
*Corresponding Author Email: kalimpbgian(at)yahoo.com
Using joint segregation analysis (JSA) technique for flag leaf area, mixed inheritance analysis was performed in six basic generations (P1, F1, P2, BC1, BC2 and F2) of four bread wheat crosses viz., Hashim-08 × LU-26, Farid-06 × Shafaq, Parula × Blue Silver and TD-1 × D-97603 at Nuclear Institute for Food and Agriculture (NIFA), Peshawar, Pakistan during cropping season 2011-12. Results revealed that flag leaf area in cross Hashim-08 × LU-26 was found to be controlled by additive, dominance and epistasis of two major genes (Model B-1). In cross Farid-06 × Shafaq and Parula × Blue Silver the flag leaf area was under the control of mixed action of two major additive dominant epistatic genes plus additive dominant polygenes (Model E-1). In cross TD-1 × D-97603 the flag leaf area was under the control of mixed one major gene and additive dominance polygenes (Model D-1). The major gene variation (σmg2) and heritability (hmg2) was higher than the polygene variation (σpg2) and heritability (σpg2) in case of cross Farid-06 × Shafaq and Parula × Blue Silver. Polygene variation and polygene heritability was zero because no polygenes were involved in case of Hashim-08 × LU-26 and the trait was mainly under the influence of major genes. On the other hand, in cross TD-1 × D-97603, polygene variation and polygene heritability was higher compared to major gene variation and heritability. Higher environmental variation for the trait suggests that it was highly under the influence of environment. The trait (flag leaf area) suggests early selection in cross Hashim-08 × LU-26, Farid-06 × Shafaq, Parula × Blue Silver and delayed selection till the accumulation of maximum favorable genes in cross TD-1 × D-97603.
Key words: Triticum aestivum L., flag leaf area, major genes plus polygenes inheritance