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根据乌克兰蚕业试验站家蚕育种部(梅列法城)和保加利亚养蚕试验站(符腊察城)科研协作计划,在1987年春季饲育期,对苏联和保加利亚选育的品种的配合力进行了研究。其品种有:梅4(梅列4号的简称,下同)、梅5、梅6、梅7、梅8和梅9。根据测试成绩,可利用的有希望的测试品种有乌10(乌克兰10号简称,下同)、乌11、乌12、乌14—1、乌15—1和乌12—2。根据多系杂交的方法(型式1是B·T·沃尔夫等于1980年做),研究了育成品种和测验品种的杂交:一是梅4、梅6、梅8与乌10、乌14—1、乌15—1杂交;二是梅5、梅7、梅9与乌11、乌12、乌15—2杂
According to the collaborative scientific research program of Silkworm Breeding Department of Ukraine (Serbia and Montenegro) and Bulgarian Sericulture Experiment Station (Ruratchal), at the spring 1987 breeding season, the combining ability of varieties bred in the Soviet Union and Bulgaria Study. The varieties are: plum 4 (Melaleuca 4 abbreviation, the same below), plum 5, plum 6, plum 7, plum 8 and plum 9. According to test scores, there are promising test varieties available Ukrainian 10 (Ukraine 10 abbreviation, the same below), Ukraine 11, Ukraine 12, Ukraine 14-1, Ukraine 15-1 and Ukraine 12-2. According to the method of multi-line crossing (type 1 is B · T · Wolff equal to 1980), the hybridization of cultivated and tested cultivars was studied: one was Mei 4, Mei 6, Mei 8 and Wu 10, Wu 14- 1, Ukraine 15-1 hybrid; two is plum 5, plum 7, plum 9 and Ukraine 11, Ukraine 12, Ukraine 15-2 hybrid