论文部分内容阅读
以甘蓝型油菜(Brassica napus L.,AACC,2n=38)[(O)13.3(gur)13.3(a )]CMS材料与白菜 (B. campestris ssp. chinensis Makino, AA,2n=20) 品种新选1号、矮脚黄和芜菁 (B. campestris ssp. rapifera Sinsk , AA,2n=20)品种耐病98[(-)13.3(1)]进行杂交、回交。F1花粉母细胞减数分裂染色体构型为10Ⅱ+9[(242361)(241243)]BC1生长势强的群体中,新选1号和耐病[(98)13.3(-)0(1)]染色体构型多为10Ⅱ+9Ⅰ,矮脚黄的染色体构型以10Ⅱ和10Ⅱ+7Ⅰ占优势;BC1生长势弱的群体中,新选1号和耐病[(98)13.3(-)0(1)]染色体构型多为10Ⅱ+7Ⅰ,矮脚黄的染色体构型多为10Ⅱ+1[(242361)(241243)]BC2生长势强的群体中,新选1[(272305265304310276311253314345271271320315)13.3(266340316252)]10Ⅱ+1Ⅰ,矮脚黄多为10Ⅱ;BC2生长势弱的群体中,新选1号和矮脚黄多为10Ⅱ,耐病98[(-)13.3(1)]多为10Ⅱ+6[(242361)(241242)]10Ⅱ+5[(242361)13.3(241243)]BC3根尖染色体观察新选1号、矮脚黄染色体数达到100%,耐病98[(-)13.3(1)]中染色体数为20的细胞达到78.12%。同时对BC1代不同染色体数在减数分裂Ⅰ的分离规律进行了研究。结果表明,AACC染色体组物种与AA染色体组物种杂交经少数几代回交即可获得后代性状相
The new CMS cultivars (Brassica napus L., AACC, 2n = 38) [(O) 13.3 (gur) 13.3 (a)] and B. campestris ssp. Chinensis Makino (AA, 2n = 20) Selection 1, B. campestris ssp. Rapifera Sinsk (AA, 2n = 20) variety disease-resistant 98 [(-) 13.3 (1)] were hybridized and backcrossed. F1 pollen mother cell meiosis chromosome configuration for the 10 Ⅱ +9 [( 242 361) ( 241 243)] BC1 growth potential strong group, the new selection 1 and disease-resistant [98] The chromosome configuration of 13.3 (-) 0 (1) was mostly 10Ⅱ + 9Ⅰ, while the chromosome configuration of dwarf yellow was dominated by 10Ⅱ and 10Ⅱ + 7Ⅰ. Among the population with weak growth potential of BC1, 98) 13.3 (-) 0 (1)] The chromosome configuration is mostly 10Ⅱ + 7Ⅰ. The chromosome configuration of dwarf yellow is mostly 10Ⅱ + 1 [( 242 361) BC2 growth potential strong group, the new election 1 [( 272 305 265 304 310 276 311 253 314 345 271 271 320 315) 13.3 ( 266 340 316 252)] 10 Ⅱ + 1 Ⅰ, dwarf yellow mostly 10 Ⅱ; BC2 growing weak groups, the new election No. 1 and dwarf yellow more For the 10 Ⅱ, disease resistance 98 [(-) 13.3 (1)] mostly 10 Ⅱ +6 [( 242 361) ( 241 242)] 10 Ⅱ +5 [( 242 361) 13.3 ( 241 243)] BC3 apical chromosome observation of new selection 1, dwarf yellow chromosome number reached 100%, disease-resistant 98 [(-) 13.3 (1)] in the chromosome number of 20 cells reached 78.12%. At the same time, the segregation rule of different chromosome number of BC1 in meiosis Ⅰ was studied. The results showed that AACC chromosome group species and AA genome group cross after a few generations of backcross to get the progeny characters