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Pakistan Journal of Biological Sciences
  Year: 2005 | Volume: 8 | Issue: 4 | Page No.: 553-557
DOI: 10.3923/pjbs.2005.553.557
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Heterosis Estimates for Yield and Yield Components in Sunflower (Helianthus annus)

Masood Jan , Farhatullah and Ghulam Hassan

The study was carried out to determine magnitude of heterosis for six heritable traits in sunflower. Study was conducted during 2000-2003 at NWFP Agricultural University, Peshawar on a 8x8 diallel cross of sunflower to find out the extent of heterosis for parameters like head size, achene yield/plant, achene number/plant, 100-achene weight, achene yield (kg ha-1) and oil content. Heterosis was observed for all the parameters studied. The magnitude of heterosis for different characters varied for the parameters studied and it was the maximum (32.88%) for head size and minimum (1.29%) for achene yield ha-1. No cross combination was consistent in heterosis for all characters studied. Maternal effects were significantly visible for traits like achene number/plant, achene yield ha-1 and oil content but not significantly visible for head size, achene yield/plant and 100-achene weight. For most of the characters except head size and achene number, heterosis was more in those cross combinations where parents were phenotypically at distance.
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How to cite this article:

Masood Jan , Farhatullah and Ghulam Hassan , 2005. Heterosis Estimates for Yield and Yield Components in Sunflower (Helianthus annus). Pakistan Journal of Biological Sciences, 8: 553-557.

DOI: 10.3923/pjbs.2005.553.557






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