Chemical regulation method for promoting thorough abortion of TGMS (thermo-sensitive genic male sterile) wheat BNS pollen

Abstract

The invention discloses a chemical regulation method for promoting thorough abortion of TGMS (thermo-sensitive genic male sterile) wheat BNS pollen. In Huang-Huai wheat main producing area, TGMS wheat BNS is sowed under the sowing condition in a sterility period, namely, a period from 23th, September to 17 th, October, a sterile line is formed, a hydrogen peroxide solution with the molar concentration of 5,000 mu mol / L is adopted to perform whole-plant spraying treatment on TGMS wheat BNS plants once every four days from a first day of a period starting from stamen development to a stamen and pistil primordium differentiation period until ears of wheat are extracted from flag leaf sheaths, the spraying amount is 50-80 L / mu, and other steps refer to a general field production management mode. According to the chemical regulation method, the hydrogen peroxide solution with the molar concentration of 5,000 mu mol / L is adopted for treatment, so that the pollen abortion rate of BNS under the sowing condition in the sterility period reaches the complete sterility level, the self-fertility percentage is 0, and the requirement for the sterile line in hybrid wheat production is met; the chemical regulation method is relatively simple to operate, the cost is lower, time and labor are saved, and the chemical regulation method has broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical regulation and control of BNS pollen fertility of thermosensitive genic male sterile wheat, and in particular relates to a chemical regulation method for promoting complete abortion of thermosensitive genic male sterile wheat BNS pollen. 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 fertilit...

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 At present, there are few reports on the research, and there is no report on the use of hydrogen peroxide spraying to promote the temperature-sensitive GMS line wheat BNS under the condition of sowing in the sterile stage, and the pollen is completely aborted.