Cleistogamic mutant material of brassica napus and breeding application of cleistogamic mutant material

Abstract

The invention discloses a cleistogamic mutant material of brassica napus. The cleistogamic mutant material of the brassica napus provided by the invention is a cleistogamic mutant Zhong 9-Clg, and isobtained by screening of brassica napus cultivar Zhongshuang No. 9 subjected to induced mutation by ethyl methyl sulfone; and the mutant shows that petals are closed without cracking during the entireflowering period, but fruiting is normal, the petals are shrunken, the edges of calyxes are adherent, no missing or obvious structural variation is found in other flower organs such as stigmas, filaments and anthers, electron microscope scanning results show that the epidermal cells of the petals of the mutant have irregular arrangement, cuticles are reduced, the number of stomata in the lower surfaces of the calyxes is reduced, the cell ornamentation is in the shape of stripes, the upper epidermal cells are disordered and wrinkles exist. The pollination traits of the cleistogamic mutant Zhong 9-Clg are utilized to change the pollination behavior of the brassica napus, so that a plurality of excellent traits such as excellent brassica napus quality can be maintained stably, and theoretical and technical support is provided for breeding of the brassica napus.

Description

technical field [0001] The invention relates to the technical field of crop breeding, in particular to a brassica napus cleistopollination mutant material and its breeding application. Background technique [0002] Rapeseed is an important oil crop and protein crop in the world, and it is also an important renewable energy plant. In recent years, China's rapeseed planting area and total output accounted for about 20% of the world's total. Rapeseed oil accounts for more than 55% of the oil production of China's domestic oil crops, and plays a very important role in the national edible oil supply security strategy. Rapeseed has strong stress resistance and a wide range of adaptability. According to the ecological type, it can be divided into two major regions: winter rapeseed and spring rapeseed. my country's rapeseed production is dominated by winter rapeseed, and its planting area and output account for about 90% of the country's total. Winter rapeseed planting areas are ...

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Problems solved by technology

[0006] According to the data retrieval conducted by the applicant, there is no relevant report on the cleistinia characteristics of rapeseed in China at present, and there are no cleistinia varieties and materials used in production

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