| Abstract: |
This experiment was conducted during the summer seasons of 2000-2003 at the Experimental Farm of the Faculty of Agriculture, Zagazig University. Five cowpea cultivars; viz., IT 86F, IT 93K, Kafr El-Sheikh-1, Dokki-331 and Kaha-1 were crossed in a diallel mating system, without reciprocals and evaluated in summer season of 2003.Both general (gca) and specific (sca) combining ability were highly significant in the studied nine traits; i.e., plant height, branch number per plant, 4th leaf area, early green pod weight, early green pods number, early yield of green pod, average pod weight, total green pods number, and total plant yield of green pod. A pronounced heterosis over BP was observed in IT 93K x Kafr El-Sheikh (148.8%; 189.9%) and Kafr El-Sheikh x Kaha (75.2%; 113.8%) both for early green pods number and early yield of green pod, respectively, and IT 86F x Dokki, Kafr El-Sheikh x Kaha and Dokki x Kaha (46.0, 46.5 and 46.3%, respectively) for total green pods yield. Additive (D) and non additive had significant effect on all the nine traits. from Wr/Vr graph and (H1/D)1/2, the traits showed over dominance were leaf area, early yield, early green pod number and total plant yield, and other traits showed complete dominance.
|
|
|