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极矮化抗病苹果砧木──Ｇ．６５美国康乃尔大学纽约州立农业试验站的Ｊ．Ｎ．Ｃｕｍｍｉｎｓ等从Ｍ２７×美丽酸苹果（ＢｅａｕｔｙＣｒａｂ）的杂交后代中选出热那亚６５号（Ｇｅｎｅｖａ６５：Ｇ．６５）矮化砧木，其矮化效果大于Ｍ９，固地性好，早熟性和产量同Ｍ９，...
Very dwarf disease-resistant apple rootstock ─ ─ G. 65 New York State Agricultural Experiment Station at Cornell University. N. Cummins et al. (Geneva65: G.65) dwarfing rootstocks were selected from the hybrid progeny of M27 × BeautyCrab. The dwarfing effect was greater than that of M9, and the solidity, precocity and yield were similar to those of M9, ...