Bc INSTITUTE FOR BREEDING AND PRODUCTION OF FIELD CROPS
Department of Cereal Crops, Marulicev trg 5/I, 10000 Zagreb, Croatia.
Slobodan Tomasovic and Petar Javor.
The effect of artificial infectin on the components of grain yeild in wheat with a natural infection of Fusarium head blight.
Evaluation of wheat for resistance to FHB under artificial infection showed a reduction in the number of kernels/spike, kernel weight/spike, and 1,000-kernel weight. The greatest effect of FHB infection was on the number of kernels/spike, and the least effect was on the 1,000-kernel weight. We conclude that the number of kernels/spike may be a good indicator of resistance in a particular genotype to FHB.
Results of an analysis of variance for various yield components under artificial and natural infection are shown in Table 1. We observed a significant difference among the genotypes for kernel number/spike in trial 1 with both artificial and natural infections. However, these results were not obtained in the second trial. The reduction in 1,000-kernel weight was significant only under natural infection and only in trial 1.
| Component | F-test significance * | |||
|---|---|---|---|---|
| Artificial infection | Natural infection | |||
| trial 1 | trial 2 | trial 1 | trial 2 | |
| Kernel number/spike | ++ | ++ | ++ | --- |
| Kernel weight/spike (g) | ++ | --- | ++ | --- |
| 1,000-kernel weight (g) | --- | --- | ++ | --- |
| * ++ significant at p = 1 %; - not signigicant at p = 1 % | ||||
Publications.
Javor P, Tomasovic S, and Sesar B. 1998. Yields of the newly developed Bc winter wheat cultivars and their genetic resistance to certain fungal diseases. Sjemenarstvo 15:253-260 (in Croatian with English summary).
Tomasovic S. 1997. Effect of artificial and natural infections os wheat with Fusarium graminearum Schw. on grain yield per plant. Agnon Glasnik 3-4:203-226 (in Croatian with English summary).
Tomasovic S. 1997. Effect of artificial and natural infections of wheat with Fusarium graminearum Schw. on the most important grain yield components. Agnon Glasnid 3-4:227-255 (in Croatian with English summary).