The fungus Melampsora lini causes a disease known as flax rust.Different strains of M. lini cause varying degrees of the rust disease.Conversely, different strains of flax are resistant or sensitive to thevarious varieties of rust. The Bombay variety of flax is resistant toM. lini-strain 22 but sensitive to M. lini-strain 24. A strain of flaxcalled 770B is just the opposite; it is resistant to strain 24 but sensitive to strain 22. When 770B was crossed to Bombay, all F1 individuals were resistant to both strain 22 and strain 24. When F1individuals were self-fertilized, the following data were obtained:43 resistant to strain 22 but sensitive to strain 24 Explain the inheritance pattern for flax resistance and sensitivityto M. lini strains.9 sensitive to strain 22 and strain 2432 sensitive to strain 22 but resistant to strain 24110 resistant to strain 22 and strain 24
The
Different strains of M. lini cause varying degrees of the rust disease.
Conversely, different strains of flax are resistant or sensitive to the
various varieties of rust. The Bombay variety of flax is resistant to
M. lini-strain 22 but sensitive to M. lini-strain 24. A strain of flax
called 770B is just the opposite; it is resistant to strain 24 but sensitive to strain 22. When 770B was crossed to Bombay, all F1 individuals were resistant to both strain 22 and strain 24. When F1
individuals were self-fertilized, the following data were obtained:
43 resistant to strain 22 but sensitive to strain 24 Explain the inheritance pattern for flax resistance and sensitivity
to M. lini strains.
9 sensitive to strain 22 and strain 24
32 sensitive to strain 22 but resistant to strain 24
110 resistant to strain 22 and strain 24
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