经X射线诱导发现的家蚕体形突变第2数珠蚕(mf-2)在形态上与数珠蚕(mf:12-39.8)相似。通过二者间的杂交实验表明,mf-2与mf为独立遗传;与各染色体的标记基因进行连锁分析,发现mf-2与第15染色体的眼纹全黑(bl:15-0.0)连锁,说明mf-2基因属于第15连锁群;初步测定mf-2与bl间的遗传距离为27.7 cM。
The moniliform 2 is an X ray-induced mutant of body shape.Its morphology is similar to that of the natural moniliform silkworm(mf: 12-39.8).Hybridization experiment between them showed that mf-2 is inherited independently with mf.Linkage analyses of mf-2 with marker genes on each chromosome indicated that the mutant gene mf-2 is linked with the blind(bl: 15-0.0) which belongs to the 15th linkage group,meaning that the mf-2 gene is also on the 15th linkage group.The genetic distance between mf-2 and bl was determined as 27.7 cM.