Cross Hybridisation of the Selected Parents

Q. Heterosis (hybrid vigor) is desirable in vegetatively propagated plants because:

1. Heterosis is maintained for a longer duration
2. These plants are easy to cultivate
3. Vegetative reproduction helps to multiply fast
4. It is due to homozygosity

Q. Which one of the following is a man-made variety made by combining wheat and rye?

1. Triticum
2. Cicer arietinum
3. Secale
4. Triticale

Q. Which one of the following is a man-made variety made by combining wheat and rye?

1. Triticum
2. Cicer arietinum
3. Secale
4. Triticale

Q. In maize, hybrid vigour is exploited by:

1. Inducing mutations
2. Bombarding the seeds with DNA
3. Crossing of two inbreed parental lines
4. Harvesting seeds from the most productive plants