Question

Sequence the Cross combinations of the apple rootstock
(A) Malling 2 $\times$ Northern Spy
(B) Malling 1 $\times$ Northern Spy
(C) Northern Spy $\times$ Merton 793
(D) Northern Spy $\times$ Malling 2
Choose the correct answer from the options given below:

• A. M.25 - M.111 - M.104 - M.106
• B. M.111 - M.25 - M.106 - M.104
• C. M.104 - M.106 - M.111 - M.25
• D. M.104 - M.111 - M.106 - M.25

Hint:

All Malling-Merton (MM) series rootstocks carry genes from 'Northern Spy' because it was used as the donor parent to introduce resistance to woolly apple aphid.

Answer 1

The Correct Option is D