白菜型油菜(B. campestris L.)双显性核不育896AB的选育

以北方白菜型油菜自交系Ｓ３－１８为母本，加拿大白菜型春油菜Ｔｏｂｉｎ为父本杂交，在自交２代中出现不育株３７ＡＢ，经研究认为，该不育材料是由２种不育基因（ＭＳＭＳｒｆｒｆ，ＭＳｍｓｒｆｒｆ），４种保持基因（ＭＳＭＳＲｆｒｆ，ＭＳｍｒＲｆｒｆ，ｍｓｍｓＲｆｒｆ，ｍｓｍｓｒｆｒｆ）组成的杂合不育群体，用成对保持，双隐性测交的方法，经２～３个世代的选育，育成８９６ＡＢ双显性不育系及１２５ａｂ等双隐性临保系

Selection and Breeding of Double Dominant Nuclear Sterility of 896AB in B. campestrics L.

Self-bred line S3-18 of the Northern B. campestrics L. , as female parent, cross with B. campestrics L. Canadian spring, as male parent. The sterile plant 37AB appeared in the second selfing generation. The study showed that sterile material is constitutes of heterozy gous sterility population with 2 sterile genes (MSMSrfrf, MSmsrfrf) and 4 maintaining genes (MSMSRfrf, msMSRfrf, msmsRfrf, msmsrfrf). Using paird maintaining, double recessive test crossing, the doubledominant nuclear sterility line of 896 AB and double recessive temporary maintainer 125 ab after 2~3 selecting generation. The completely sterile line can be obtained crossing temporary double dominant maintaining line with double dominant sterile line; and then the completely sterile line can become fertile, crossed the plant with inhibiting genes with com plete sterility; finally,the 3 lines of the double dominance formed a complete set.