Method for increasing hybrid rape planting purity by applying herbicide resistant mutant character

Abstract

The invention provides a method for increasing hybrid rape planting purity by applying a herbicide resistant mutant character, which belongs to a plant breeding method. A conventional breeding technique is applied to transfer and breed imidazoline ketone herbicide resistance to a cytoplasmic male sterility restorer; a resistance restorer is utilized to selectively breed new combination of hybrid rape; and when the new combination F1 is planted, an imidazoline ketone herbicide is sprayed once at the seedling stage, so that all false hybrids without resistance such as trace pollen selfing plants, foreign pollen pollution plants and all mechanical mixing plants in a sterile line can be killed and removed, thereby greatly increasing the hybrid rape planting purity and maximizing the potential yield increase and the yield level of hybrids.

Description

technical field [0001] The invention relates to a method for improving the planting purity of hybrid rape by applying herbicide-resistant mutation traits, which belongs to the plant breeding method. Specifically, it involves methods such as the transfer of herbicide-resistant traits, the screening of resistant restorer lines, the production of resistant combination seeds, and the identification of hybrid planting purity. Background technique [0002] The use of heterosis can greatly increase the yield of rapeseed. The success of heterosis utilization in rapeseed depends on two important conditions, one is to have a suitable genetic mating system, and the other is to have efficient and economical hybrid seed production technology. At present, there are two types of genetic mating systems used in hybrid rapeseed production in my country, cytoplasmic male sterile system and nuclear male sterile system. The former is sensitive to low temperature due to the sterile cytoplasm, a...

AI Technical Summary

Problems solved by technology

However, my country's transgenic herbicide-resistant rapeseed has not yet been approved for commercial planting, mainly for the following two reasons: First, transgenic crops must pass strict safety evaluations before entering commercial production. and insect vectors, herbicide resistance genes may transfer resistance genes to rapeseed relatives through pollen drift and make them resistant. Rapeseed is one of the crops that need special attention

Secondly, so far, domestic research materials on genetically modified herbicide-resistant rapeseed basically come from abroad, and resistance genes are protected by international intellectual property rights. Once commercialized, expensive patent fees must be paid to patent owners, which will greatly increase Rapeseed production cost

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