Discovery and application of a new kind of genic male sterile material Mian 7AB-4-2 in Brassica napus L

摘要

We discovered a new genic male sterile material Mian 7AB-4-2 in the selection of a genic male sterile line Mian 7AB-4 in Brassica napus in 1998. The rate of sterile plants from the selfing progeny of fertile plants was over 60%. We made test crosses and back crosses with a sib line Mian 7AB-4-1 and 9 other male sterile materials of different sources. In test crosses, 80% of the materials produced over 90% of sterile rate. In backcrosses, the rate of sterile plants was also over 80%. The results were evidently different from other recessive genic male sterile lines in Brassica napus. In present paper, we discussed the possibility of seed production with three-line genic male sterility system in hybrid rapeseed production.