Diallel analysis of grain yield and other agronomic traits in durum wheat [Triticum durum]
1991
Ul Haq, I. | Laila, T. (University of Agriculture, Vienna (Austria). Inst. of Agronomy and Plant Breeding)
In a 5x5 half diallel analysis, three Austrian and two French durum wheat cultivars were investigated. Plant height, last internode length, spike length, number of spikes/plant, number of fertile spikelets, kernel number and kernel weight, main spike, 1000-kernel weight, and grain yield per plant were recorded during the 1984-86 seasons. Cultivars showed significant differences among the years for most of these traits. Crosses Unidur x Miradur and Mondur x Arcour achieved maximum heterosis for grain yield and its components in comparison to their parental means. General combining ability (GCA) effects were significant for plant height, last internode length, and spike length; and were larger than the specific combining (SCA) effects for number of spikes/plant and kernel number/main spike. The cultivars Mondur and Unidur seemed to be best general combiners. Cultivar Miradur, on the contrary, gathered the maximum negative GCA values. The crosses Unidur x Miradur, Mondur x Arcour, and Attila x Mondur showed high positive SCA values for grain yield and its components; 1000-kernel weight was not heritable. Low to moderate heritabilities were calculated for spike length, fertile spikelets, kernel number and kernel weight per main spike, and number of spikes and grain yield per plant. Heritabilities were moderate for last internode length, and high for plant height
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