Question

Disease resistant varieties can be produced by _________________

• A. Crossing a plant with wild variety
• B. Treating with colchicine
• C. Crossing with hormones
• D. Treating with low temperature

Answer 1

The correct option is A Crossing a plant with wild variety

• Classical plant breeding uses deliberate crossing of closely or distantly related individuals to produce new crop varieties or disease-resistant high yielding plants.
• Plants are crossbred to introduce traits/genes from one variety or line into a new genetic background.
• The goal of the cross being to introduce disease resistance without losing the high-yield characteristics.
• Progeny from the cross would then be crossed with the high-yielding parent to ensure that the progeny were most like the high-yielding parent, (backcrossing).
• The progeny from that cross would then be tested for yield and disease resistance and high-yielding resistant plants would be further developed.

Therefore, the correct answer is option A.