Utility of heterosis of two-line hybrid rapeseed in China: approaches and achievements

摘要

The author reviewed the approaches and achievements for utility of two-line hybrid rapeseed in China. The approaches of producing hybrid rapeseed include self-incompatibility (SI), dominant genic male sterility (DGMS), recessive genic male sterility (RGMS), ecotype cytoplasmic male sterility (ECMS), thermo and/or photoperiod sensitive genic male sterility (EGMS), and male sterility induced by chemical hybridizing agent (CHA). Almost all these approaches except SI are employed only in China because there are plentiful of labor resource and the cost of hybrid seed is not significantly higher than inbred line for each small farmer. All of these approaches have been put in practice on larger scale in China, but CHA approaches and RGMS system were more successful. However, ECMS and EGMS system are also promising.