Chemical regulation method to maintain complete abortion of thermosensitive genic male sterile wheat bns male sterile line

Abstract

The invention discloses a chemical control method for ensuring the complete abortion of the thermosensitive genic sterile wheat BNS sterile line, starting from the development of the stamens of the thermosensitive genic sterile wheat BNS sterile line to the differentiation stage of the pistil primordium to the ear of wheat Just after being completely pulled out from the flag leaf sheath, once every 4 days from the first day, use 500U / L catalase solution to spray the whole plant of the thermosensitive genic male sterile wheat BNS male sterile line plant, spray The application rate is 50-80L / mu, and the other refers to the general field cultivation management mode. The present invention adopts 500U / L catalase solution treatment through field cultivation, so that the pollen abortion rate of the BNS sterile line is close to the level of complete sterility, and the self-fertilization seed setting rate is 0, reaching the improvement of the sterile line in the production of hybrid wheat. requirements, the present invention is relatively simple in operation, low in investment cost, time-saving and labor-saving, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of BNS chemical regulation of thermosensitive genic sterile wheat, and in particular relates to a chemical regulation method for maintaining complete abortion of BNS sterile line of thermosensitive genic sterile wheat. Background technique [0002] The utilization of wheat photothermo-sensitive male sterility (PTSMS) is a major advance in the research of hybrid wheat. The wheat light-temperature-sensitive sterile lines discovered in my country, such as ES, C49S, ZP, BS, YS and BNS, have become important test materials for hybrid wheat research. [0003] Thermosensitive genic male sterile wheat BNS was successfully bred by Ru Zhengang in 2002. BNS has the characteristics of complete sterility and complete fertility transformation, and the fertility change trend is: complete abortion-semi-sterility-complete fertility. Low temperature is the main reason for affecting the fertility transformation of BNS, showin...

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Problems solved by technology

Previous studies have pointed out that the existing chemical andricides such as ethephon can effectively kill males, but after the use of ethephon, there are many problems such as slowing down the development of wheat flowers, difficulty in heading, easy to be green and late ripening, and easy to be infected with diseases and insect pests. Other existing chemical andricides are highly toxic to wheat plants, reduce male fertility, and have a strong inhibitory effect on pistil fertility. After artificial assisted pollination, the seed setting rate is low and the grains are not full, and the drug price is high. Therefore, the application of existing chemical andricides in production is limited, and existing chemical hybridization agents are used to overcome the interference of periodic fluctuations in temperature during the sensitive period of fertility conversion on the fertility stability of BNS male sterile lines of thermosensitive genic male sterile wheat research has not yet been reported

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