核质互作雄性不育纯合恢复系的育性基因型可表示为

A.N (RfRf )

B.N (rfrf )

C.S (rfrf )

D.S (Rfrf )

A.通系

B.恢复系

C.保持系

D.不育系

A.S(r r) × N(RR)

B.S(r r) × N(r r)

C.N(R r) × S(r r)

D.N(r r) × N(r r)

A.1/4

B.1/8

C.1/16

D.9/64

A.back cross

B.test cross

C.reciprocal cross

D.hybridization