Chemical regulating method for keeping sterile line of thermo-sensitive genic male sterile wheat BNS thoroughly aborted

Abstract

The invention discloses a chemical regulating method for keeping a sterile line of thermo-sensitive genic male sterile wheat BNS thoroughly aborted. Starting from the stamen development of the sterile line of the thermo-sensitive genic male sterile wheat BNS to the pistil-stamen primordium differentiation period until wheat ears are completely extracted from leaf sheaths of flag leaves, plants of the sterile line of the thermo-sensitive genic male sterile wheat BNS are subjected to whole-plant spraying treatment by adopting a 500U / L catalase solution for one time every four days from the first day, wherein the spraying quantity is 50-80L / mu, and other plants refer to an ordinary field cultivation management mode. Through field cultivation, the 500U / L catalase solution is adopted for treatment, so that the pollen abortion rate of the BNS sterile line is approximate to the complete sterility level, the self-fruitful rate is 0, and the requirement on the sterile line in the production of hybrid wheat is met. The chemical regulating method is relatively simple in operation, lower in investment cost, time-saving and labor-saving, and has a broad application prospect.

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...

AI Technical Summary

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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