A Test System for the Quantitative Assessment of Resistance to Mildew in Rye (Secale cereale L.) |
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| Authors: | V. Llnd |
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| Affiliation: | Biologische Bundesanstalt für Land- und Forstwirtschaft, Institut für Resistenzgenetik, Grünbach (Germany F. R.) |
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| Abstract: | A test system is presented allowing the quantitative measurement of two resistance components, number of mildew infections per cm2 and spore production. The infection frequency is obtained from segments of the first leaf. The spore production is determined spectrophotometrically using suspensions from the infected second leaf of the same plant. The assessment of resistance can be extended to later growth stages of the genotypes, thus providing information about the dynamics of mildew development and the existence of adult plant resistance. Multiple measurements of resistance (two components, several growth stages) increase the reliability of single plant evaluation and enhance the response to selection. This point is especially important in population breeding of rye. |
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