Application of cabbage type rape floral leaf mutant

Abstract

The invention relates to an application of a cabbage type rape floral leaf mutant. The cabbage type rape floral leaf mutant is applied by the following steps: hybridizing a sterile plant in a cabbage type rape recessive genic male sterile homozygous two-type line 20118AB serving as a female parent with a cabbage type rape floral leaf mutant serving as a male parent, bagging and performing inbreeding to obtain a floral leaf sterile plant; hybridizing the floral leaf sterile plant with a fertile plant in 20118AB to breed a new homozygous two-type line, namely, a floral leaf recessive genic male sterile homozygous two-type line; hybridizing the floral leaf sterile plant with a temporary maintaining line to obtain a new temporary maintaining line, namely, a floral leaf temporary maintaining line; and hybridizing the cabbage type rape floral leaf recessive genic male sterile homozygous two-type line with the floral leaf temporary maintaining line to produce a cabbage type rape floral leaf complete sterile line. Purity identification and impurity removal at the seedling stage of the complete sterile line are realized by using the character of a floral leaf, the purity of the complete sterile line is increased, the genic male sterile seed production procedure is simplified, and the labor amount of field hybrid seed production is reduced.

Description

technical field [0001] The invention relates to the field of Brassica napus breeding, in particular to the application of a flower leaf mutant of Brassica napus. Background technique [0002] (1) Inheritance of recessive genic male sterile 20118A in Brassica napus [0003] Recessive nuclear male sterility has become an important way to utilize rapeseed heterosis in China because of its complete and stable sterility and wide recovery source. When planting, 50% of the fertile plants in the sterile line need to be manually removed, which limits its wide application, such as double recessive genic male sterile S45A and 117A. [0004] 20118A is a new recessive nuclear male sterile line bred by researcher Sun Chaocai of Shanghai Academy of Agricultural Sciences in 1997. The sterile line has empty anthers, no pollen, bagged self-fertilization, and stable sterility. Not affected by environmental conditions. General genetic studies have proved that 20118A is controlled by 3 pairs ...

AI Technical Summary

Problems solved by technology

The other is to use the fertility survey at the flowering stage for identification. This method requires low-temperature vernalization at the seedling stage and can only be carried out after flowering, and the cycle is longer.

Images