中文摘要：

以普通小麦川农19（N，7＋8，2＋12）和1BL／1RS易位系小麦川农18（1，7＋9，2＋12）F1为试材，用十二烷基硫酸钠一聚丙烯酰胺凝胶电泳（sodium dodecyl sulphate—polyacrylamide gel electrophoresis，SDS-PAGE）法鉴定分析了杂交后代的高分子量谷蛋白亚基组成，发现其中1粒产生了2个亲本中都没有的高分子量谷蛋白亚基，其高分子量谷蛋白亚基组成为（1，X＋7＋8＋9，2＋12）。变异的亚基在SDS—PAGE电泳图谱上位于1Dx5和JBx7亚基之间，迁移率与1Bx6相似。统计变异株F2代HMW—GS的遗传规律，结果表明，Glu-Al位点上的亚基分离正常：而Glu—B1位点上亚基的分离以及Glu-A1与例Glu-B1位点之间的组合都不符合孟德尔遗传规律：变异亚基与IBy8亚基呈现共显性。最后对变异产生的机制进行了探讨。

英文摘要：

The compositions of high-molecular-weight glutein subunits （HMW-GS） of F1 grains derived from wheat Chuannongl9 （N, 7 ＋ 8,2 ＋ 12） × Chuannong18 （ 1,7＋ 9,2 ＋ 12 ） were analyzed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis （SDS PAGE）, and a HMW- GS variant was detected in one of the grains tested. The HMW-GS patterns of the variant seed were（1, x＋ 7 ＋ 8 ＋ 9,2＋ 12）. SDS-PAGE analysis showed that the band of variant subunit was similar to 1Bx6, which located between 1Dx5 and 1Bx7. The HMW-GS subunits encoded by GlwB1 and the combination of Glu-Al and Glu-B1 loci deviated the Mendel＇s segregation ratios in Fe progenies. Furthermore,the variant subunit and the 1By8 were codominant. The forming mechanism of the variant HMW-GS was discussed at last.