一、问题的提出建国以来,我国广大蔗区不断地进行甘蔗有性杂交育种科研工作,虽然先后育成几十个新良种或优良新品系,但育种效能仍较低。例如江西第一糖厂甘蔗试验场1965～1978年的实绩,约82,000个杂种才育成一个良种,轻工业部甘蔗糖业研究所1954～1977年24年的平均,约培育6万个杂种才育成一个良种,我场要7 First, the issue put forward Since the founding of our country, the majority of sugar cane areas continue to carry out sexual hybrid breeding research, although it has bred dozens of new varieties or good new lines, but the breeding efficiency is still low. For example, the sugar cane farm in Jiangxi Province from 1965 to 1978 actual performance, about 82,000 hybrids were bred into a seed, the Ministry of Light Industry Cane Sugar Institute of 1954 to 1977, the average of 24 years to cultivate about 60,000 hybrids to form a Good seed, my field to 7