A.育成雜交 B.導(dǎo)入雜交 C.經(jīng)濟(jì)雜交
A.遠(yuǎn)緣雜交 B.經(jīng)濟(jì)雜交 C.導(dǎo)入雜交
A、0.02-0.05 B、0.025-0.03 C、0.25-0.3