Open Access
Table 1.
Experimental plan over 5 years to determine the effects of major gene resistance management on changes in downy mildew pathogenicity, H1, H2, H3 and H4 are quasi isogenic forms of a sunflower hybrid differing only for their downy mildew resistance genes.
| Years | Plots (65 m²) |
|||||
|---|---|---|---|---|---|---|
| MixtureH1234 | Alternation | ReferenceH1 | MonocultureH2 | MonocultureH3 | CombinationH4 | |
| n | H1, H2, H3, H4 | H1 | H1 | H2 | H3 | H4 |
| n + 1 | H1, H2, H3, H4 | H2 | H1 | H2 | H3 | H4 |
| n + 2 | H1, H2, H3, H4 | H3 | H1 | H2 | H3 | H4 |
| n + 3 | H1, H2, H3, H4 | H4 | H1 | H2 | H3 | H4 |
| n + 4 | Soil test | Soil test | Soil test | Soil test | Soil test | Soil test |
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