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以博 A配组的博优系列组合一般产量高、米质好 ,面上推广十多年后 ,发现博优系列组合抗性退化、产量下降 ,为此 ,对博 A进行杂交改良 ,历时 6年 ,选出新一代不育系博 A。1 选育1990年早造用博 B为母本、 32 B为父本进行杂交 ,1992年从 F4中选育出优良单株系列 ,并与母本博 A
Bo combination with the Bo combination of high-quality series of general high yield, good quality rice, the promotion of more than 10 years after the panel, we found that the combination of Bo You series of resistance degradation, yield decline, for this Bo A hybrid improvement, lasted 6 Years, selected a new generation of sterile line Bo 1 Breeding Early 1990 with Bo B as the female parent, 32 B as the male parent for hybridization in 1992 from F4 bred excellent single plant series, and the mother Bo A